Most Sustainable Windows & Window Companies

MOST SUSTAINABLE WINDOWS

Minimizing energy use for building heating and cooling is a major component of One Community’s open source strategy for building a global collaboration of self-sufficient and self-sustainable teacher/demonstration communities, villages, and cities for The Highest Good of All. Just by using the proper windows, the US is saving an amount of energy per year greater than 10% of annual consumption. With this in mind, we have researched the best energy efficient windows as part of our open source contribution to comprehensive sustainable living. Below you will find an overview of the best windows. It contains the following sections:

• Related Pages
• Why Assess Water-saving Faucets
• Ways to Contribute and Consultants
• Sustainability Benchmarking the Top Faucet Companies
• Best Water-saving Faucets We Could Find Buying Direct
• Best Water-saving Faucets We Could Find on Consumer Sites
• Best Water-saving Faucet Accessories We Could Find
• Resources
• Summary
• FAQ

RELATED PAGES (mouse-over for descriptions and click for complete pages)

WHY ASSESS WINDOWS

In contemporary building design, windows play a pivotal role, shaping the appearance and functionality of structures. Today’s urban landscapes reflect a transformation of the past few decades: an increasing desire for well-lit spaces has fueled the proliferation of windows. As a result, the selection of suitable windows has become more important than ever for the energy savings of a building. The glass type, coatings, and frame materials collectively determine a window’s performance. Choosing the right types of windows can greatly enhance a house or building’s energy efficiency.
Thanks to substantial improvements in window technology, we can now have greater luminosity within buildings and vastly improved insulation capabilities compared to even a decade ago. However, the importance of selecting the right window persists, as windows vary significantly in their attributes.
This article presents the best and most sustainable window company and product options available in the market. Drawing from 100+ hours of research and a comprehensive exploration of fenestration dynamics, we are able to provide you with an all-encompassing overview of windows to support our own projects as well as yours.

Throughout this page, we share insights gained from our selections for projects such as the Earthbag Village and our Duplicable City Center. As new information becomes available, we will continue to update our research and may update our selections accordingly.

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RESEARCHER FOR THIS COMPONENT:

Brianna Olsen: Sustainability Researcher
Elizabeth Kahn: Environmental Consultant
Ian Coletti: Environmental Studies Major, Researcher
Philip Bogaerts: Structural Window Designer

UNDERSTANDING WINDOWS

When deciding which windows are right for your house, it is primarily important to understand how windows work and what influences their performance. Whether you choose double or triple glazing, as well as what type of coating you use will have a significant impact on a windows performance and are therefore important factors to consider. Below you can find an overview of these different aspects for guiding your decision.

GAS CAVITY: AIR VS. ARGON VS. KRYPTON

A gas cavity on windows refers to the space between two or more glass panes that is filled with either air, argon, or krypton gas. These gas-filled cavities serve to improve insulation by reducing heat transfer through the window, with argon and krypton providing higher thermal efficiency compared to regular air due to their lower conductivity properties. In the list below, we explore the differences between air, argon, and krypton when used as window glazings.

• Argon is the most common gas to use in terms of price quality. It is six times denser than air and therefore more efficiently blocks thermal energy traveling through windows.
• In terms of insulations, krypton is the best gas filling as it is 12 times denser than air. It also reduces the width of the cavity by 0.2 inches. Therefore, with a double glazing the width will be approximately 0.2 inches thinner and with triple glazing it will be 0.4 inches thinner.
• Although krypton is even more efficient than argon, the gains are outweighed by the significant increase in cost.
• Krypton is +/- 40% more expensive than argon and the performance gains are minimal. Therefore it is mostly used when there is limited space.
• Air is the cheapest of these options, but it is rarely used as its performance is much worse than argon. Additionally, the oxygen in air-filled windows can cause rust and erosion, making their lifespan much shorter.

Comparison of Different Glass Configurations – Click for source

DOUBLE GLAZING ARGON VS. TRIPLE GLAZING ARGON

As we established in the previous section, argon is the most cost-efficient and effective gas used for window glazing. Argon glazing involves the infusion of argon gas between the glass panes to enhance insulation and energy efficiency by reducing heat transfer and improving thermal performance. This inert gas acts as a barrier, minimizing heat loss and condensation while contributing to a more comfortable indoor environment and a more sustainable home overall. In the list below, we explore a comparative overview of argon glazing options, encompassing light transmission, thermal efficiency, acoustic insulation, cost factors, and spatial considerations. In the realm of window glazing, the interplay between these factors yields a diverse array of options to consider when selecting your windows.

• A double argon glazing with no coating will let through +/- 77% of the visible light, a Solar Heat Gain Coefficient (SHGC) of 0.66, and a U-value of 0.437.
• A triple glazing with no coating will let through +/- 70% of the visible light, a SHGC of 0.66, and a U-value of 0.277.
  • From this point of view, triple glazing is +/- 10% more efficient than double glazing.
• When using coatings, the visible light transmission is a little bit lower with triple glazing, but there is a big upside from the thermal point of view. The U-value can be reduced by 60-70% and the thermal insulation is thus much better.
• Triple glazing acoustically insulates much better than double glazing and reduces the noise from the street significantly. Using an acoustic Poly Vinyl Butyral (PVB) can reduce the noise by as much as 25%.
• Double glazing can be up to 30% cheaper than triple glazing. Triple glazing usually has 2 coatings applied, while double glazing only has 1 coating.
• Triple glazing requires a little more space than double glazing since it has an extra pane and cavity.

Taking the above information into account, double glazing emerges as the optimal choice in terms of price and performance. Nonetheless, it’s crucial to acknowledge that certain benchmarks might necessitate triple glazing as they cannot be attained using double glazing alone.

Terms used above:

• SHGC – Solar Heat Gain Coefficient.
  • This is the fraction of solar radiation admitted through a window, transmitted either directly and/or absorbed and released as heat inside.
• Visible light – The percentage of light that passes through the window as compared to outside.
• PVB – Poly Vinyl Butyral.
  • A pvb is used on a laminated pane, which is required for safety reasons, to avoid people falling through and get injured.

TYPES OF GLASS COATINGS

Coated glass involves the application of multiple thin layers of metal oxides onto a glass pane. These coatings serve various purposes, with two prominent types: Low-e coatings, prevalent in residential settings, and solar control coatings, primarily employed to minimize heat influx into structures. When contrasting their effectiveness, solar control coatings outshine low-e coatings by achieving a Solar Heat Gain Coefficient (SHGC) up to 40% lower.

What’s the origin of this difference? As previously discussed, a coating comprises metal oxides structured into multiple sub-layers. In particular, solar control coatings are composed of one, two, or three layers of silver. The quantity of silver layers directly correlates with enhanced insulation capabilities. However, the augmented silver layer count also corresponds to a heightened cost for the glass.

Referring to the illustration below, it’s notable that solar control coatings are administered at position 2 (on the interior side of the outer glass pane), whereas low-e coatings are commonly positioned at 3 (on the interior side of the inner glass pane). Typically, refraining from coating application on positions 1 (exterior side of the outer pane) or 4 (exterior side of the inner pane) is advised, as they are susceptible to damage.

The placement of coatings holds significance, as using coatings intended for position 3 on position 2 can lead to a substantial alteration in aesthetics. Despite potential improvements in values, such a mismatch could result in a shift in the glass color, potentially compromising the overall visual appeal of the window.

Positions of Solar Control Coatings on a Window – Click for source

Different coatings are formulated for specific positions, catering to diverse building types and environmental conditions. Opting for solar control coatings is advisable when your facades feature extensive glass surfaces and generously sized windows, allowing for precise indoor temperature regulation and yielding substantial cooling savings throughout hot summer periods.

The aesthetic aspect of windows is almost equally important to the performance of the glass. It is a common desire to retain natural light while minimizing heat as much as possible. When using low-e coatings, the light transmission is typically much higher and the light coming through the glass is more natural and neutral. In the case that you use solar coatings (Low e2 and Low e3), expect a slightly darker glass tint, influencing the internal light neutrality yet maintaining an overall natural feel.

Numerous coatings share a resemblance but exhibit distinct efficiencies. Thus, it becomes vital to consider both the aesthetics and performance when selecting the ideal glass for your building.

WINDOW PERFORMANCE METRICS

A U-value, also known as thermal transmittance, is a measure that quantifies the effectiveness of a material in preventing heat transfer. As applied to windows, this value is important for understanding the rate of heat transfer through the glass. Essentially, a lower U-value indicates better insulation performance and a higher level of sustainability for a window. By choosing windows with low U-values you can significantly enhance the energy efficiency of your building. The U-value is what is most often referred to in determining the performance of a window, in combination with the visible light transmission and the Solar Heat Gain Coefficient (SHGC).

The inclination of the glass of a window negatively impacts the U-value, leading to reduced insulation efficacy at certain angles, irrespective of the coating utilized. As is shown in the image below, a window with a 90 degree inclination (vertical) has the best insulation performance, and a window with a 45 degree inclination will perform over 30% worse in comparison. Further, a window with a zero degree inclination (horizontal) will perform over 50% worse as compared to a vertical window. Naturally, the correlation between silver layers and U-value improvement holds true, emphasizing that an increased number of layers yields enhanced insulation performance.

The Effects of Inclination on Window Performance – Click for source

BEST & MOST SUSTAINABLE WINDOW COMPANIES

In this section, we list and describe the best and most sustainable window companies we could find. While several companies have great products, some of them have engaged in more substantial efforts towards sustainability in their manufacturing and operations. Keep in mind that this research was completed in August 2023; companies are constantly evolving. We will continue to add to this page as we undergo the construction of our Earthbag Village, Duplicable City Center, and other 6 sustainable village models.

Best & Most Sustainable Windows Companies – Click to open the spreadsheet

NOTE: New technology is always being invented, check the company websites for their newest models. Even as this page becomes dated, the featured products below can be used as a good base-level starting point for your selection process. We wouldn’t recommend any product that doesn’t meet or surpass the quality and performance of the products listed here. This is how we intend to use this page as we build the Duplicable City Center and 7 sustainable village models. If better products are found when we start making our purchases, we’ll open source share here what they are and our personal experience using them.

#1: PELLA

Pella is a company that shows a definite commitment to sustainability outreach and education. The company has made notable improvements such as an over 10% reduction in energy use in two of their company buildings. Pella also uses 95% recycled aluminum in their clad aluminum window sashes (the part that holds the glass in place). Unfortunately, the same kind of information is not available for the outer frames. As far as could be found, Pella has very little in the way of a sustainability report, and information on their initiatives to improve company efficiency and sustainability is sporadic. However, the company participates in a variety of partnerships taking direct action towards sustainability. For example, they adhere to the Smartway plan to reduce the carbon footprint of its transportation routes. As an AIA/CES Registered Provider Charter Member, the Pella Corporation has been committed to developing learning tools and activities which include courses on green building. Their promotion of sustainability has even been recognized by Energy Star.

Pella’s best products:

1. Pella Impervia Fiberglass Windows
2. Pella 250 Series Vinyl Windows

#2: ANDERSEN

Andersen shows tangible and concerted effort toward maintaining and improving sustainability. They are committed to responsible materials sourcing from companies who value—and practice—environmental stewardship and social responsibility. Andersen has been able to obtain FSC certification for all of its wood. Further, they make continuous investments in creating a better and more sustainable future by optimizing production, becoming more efficient, and making the effort to use as little energy as necessary.
They have a wide range of products and with their Andersen 100 Series, they have the number one on the list of best windows overall – mainly thanks to its very sustainable composition, using wood fibers and thermoplastic polymers. On the other hand, details about their efforts towards waste reduction and repurposing are limited. While Andersen has signed the Ceres Climate Declaration, they remain responsible for their regulation.
Andersen’s best products:

1. Andersen 100 Series Awning Windows
2. Andersen Fiberglass A-series casement windows

#3: MARVIN

While Marvin calls attention to the need for sustainability, this generally has not translated into much tangible action in the same way companies higher on this list have engaged with sustainability efforts. However, they do claim to use their excess wood scraps, trimmings, and other waste materials for generating fuel. This recovery of materials for use as fuel is a sustainable practice that some manufacturing companies adopt as part of their waste management and energy efficiency efforts. Marvin also attempts to reduce Volatile Organic Compounds (VOC) emissions and to use FSC responsibly sourced wood. It should be noted that information on the extent to which they carry out these practices is limited. Marvin does not have a fully accredited environmental management system and seems to have taken relatively few measures for sustainability overall.

Marvin’s best products:

1. Marvin Elevate Casement Windows

#4: JELD WEN

Jeld Wen shows some signs of environmental responsibility. It is a member of the Smartway plan and has an accredited environmental management system. It also makes sure that its manufacturing processes and products are designed to minimize the emission of toxins. Many Jeld Wen products have been awarded the Indoor Advantage Gold Certification for the levels of safety they meet and some of the wood used in their doors is FSC certified. Aside from this the company does match the sustainability practices of companies higher on the list, despite its official yet short sustainability report. Although the company claims to recycle materials and use recycled materials in their manufacturing processes, they do not provide any real numbers on the extent of this. Jeld Wen production sites are found all over North America, Europe and Australia.

Jeld Wen’s best products:

1. Jeld Wen Brickmould Vinyl Window
2. Jeld Wen Hybrid Vinyl Windows: Awning

#5: MILGARD

While Milgard offers some great window products, the company does not disclose much information on their efforts towards sustainability. They have six private facilities in the U.S., but they are all located in the West which limits their reach significantly. With their limited available information about their production sites or operations, their lack of transparency lands them in fifth place in our rankings. However, Milgard does offer some great products and with more open publishing of their contributions to a sustainable future, they may move up the list.

Milgard’s best products:

1. Milgard Vinyl Trinsic™ Series | V300
2. Milgard Fiberglass Ultra™ Series | C650

#6: HARVEY

Harvey Windows + Doors is ranked last in our rankings due to their lack of sustainability initiatives and their additional lack of great products. Although their website offers plenty of explanations for the importance of proper and efficient windows, there is no information on how they improve their operations for increased sustainability. Further, the products they offer are limited to only vinyl and wood windows. Increased transparency, improved products, and making practical efforts for sustainable manufacturing in the future could move this company up the list.

Harvey’s best products:

1. Harvey Wood Majesty Awning Windows
2. Harvey Vinyl Classic Double Hung Windows

BEST WINDOWS OVERALL

In this section, we present the most commendable sustainable windows. It’s important to note that several features may not be included by default and certain attributes might be mutually exclusive. It’s also worth keeping in mind that these selections were made in August 2023; while new designs are consistently emerging, this list remains a valuable point of reference even as it ages. Any new product we may recommend must adhere to, at the very least, the performance benchmarks set by the products featured on this page. As we advance with the construction of the Earthbag Village, Duplicable City Center, and our other six sustainable village models, we will update this page with our latest top-rated choices, ensuring it remains current and informative over the years.

Best & Most Sustainable Windows Overall – Click to open the spreadsheet

NOTE: New technology is always being invented, check the company websites for their newest models. Even as this page becomes dated, the featured products below can be used as a good base-level starting point for your selection process. We wouldn’t recommend any product that doesn’t meet or surpass the quality and performance of the products listed here. This is how we intend to use this page as we build the Duplicable City Center and 7 sustainable village models. If better products are found when we start making our purchases, we’ll open source share here what they are and our personal experience using them.

#1: ANDERSEN 100 SERIES AWNING WINDOWS

Anderson 100 Series Awning Windows

Andersen’s 100 series awning windows are made of Fibrex, which makes them twice as strong as vinyl and allows them increased performance when exposed to extreme temperatures. Their relatively low price in combination with their great performance values makes this product ideal for many houses. They have a lifespan of 25-30 years and are water and moisture resistant. The product is Energy Star rated and does not contain any toxic components, making them a great option for a sustainable future. The window’s frames consist of 40 percent wood fiber (of which the majority is reclaimed from Andersen manufacturing processes) and 60 percent thermoplastic polymer.

The main disadvantage of these windows is that there is no triple-glazing option available at the moment. However, this may become available over time. Additionally, their fire resistance is a little bit lower than other materials. However, the advantages significantly outweigh these disadvantages and therefore, these windows take the first spot.

KEY FEATURES:

• Fibrex® material
• Endlessly recyclable
• Excellent thermal and insulating performances
• 10-year warranty

Additional Information
PRODUCT PAGE | SPEC SHEET

#2: MILGARD VINYL TRINSIC™ SERIES WINDOWS

Milgard Vinyl TRINSIC™ Series Windows

hese Milgard windows are made of Vinyl and have an incredibly narrow frame – you will barely notice it’s there. Their low price in combination with great performance values for double as well as triple windows make this product a great option in any environment or situation. They have a lifespan of 20 years and are water and moisture resistant. The product is also Energy Star rated and their 100% recyclability means they can be recycled up to 7 times without losing their quality. On top of this, they have a full lifetime warranty.

The main disadvantage of these windows is that when exposed to extreme temperatures, their material may slightly expand or shrink, which can affect the overall performance. Further, their fire resistance is lower than other materials.

KEY FEATURES:

• Vinyl material
• Easily recyclable
• Excellent thermal and insulating performances
• Full lifetime warranty

ADDITIONAL INFORMATION
PRODUCT PAGE | SPEC SHEET

#3: PELLA IMPERVIA FIBERGLASS WINDOWS

Pella Impervia Fiberglass Windows

hese Pella windows are made of fiberglass with an incredibly narrow frame, in combination with great performance values for a double window option. The product is extremely fire resistant and is also resistant to extreme weather conditions. Their 50-year lifespan is the best you can find and there is a 10-year limited warranty on this product. The product is also Energy Star rated and while these types of windows can not be recycled, they are fully biodegradable.

The main disadvantage of these windows is that they can not be recycled and that currently, there is no triple-glazing window option available. If this changes over time, this will be a great product to consider for all buildings.

KEY FEATURES:

• Fiberglass material
• Fully biodegradable
• Excellent thermal and insulating performances
• 10-year limited warranty

ADDITIONAL INFORMATION
PRODUCT PAGE | SPEC SHEET

#4: MARVIN ELEVATE CASEMENT WINDOWS

Marvin Elevate Casement Windows

These Marvin windows are made of fiberglass and wood. The wooden exterior gives a modern look to the design protecting it from mold and weather conditions, and the wooden interior creates a warm and classic feel. These windows have a narrow frame in combination with great performance values for double windows. The product has a good fire resistance and is also resistant to extreme weather conditions thanks to the fiberglass on the outside. This product has a 50-year lifespan and a 20-year limited warranty. Additionally, it is Energy Star rated and although the windows are not entirely recyclable, they are fully biodegradable.

The main disadvantage of these windows is that they can not be fully recycled and that there is currently no triple-glazing window option available for this product. If this ever changes, this will be a great option for all buildings.

KEY FEATURES:

• Fiberglass material on the outside and wood on the inside
• Fully biodegradable
• Excellent thermal and insulating performances
• 20-year limited warranty

ADDITIONAL INFORMATION
PRODUCT PAGE | SPEC SHEET

#5: MILGARD FIBERGLASS ULTRA SERIES C650 WINDOWS

Milgard Fiberglass Ultra Series C650 Windows

hese Milgard windows are made of fiberglass and have an incredibly narrow frame in combination with great performance values for double windows. The product is extremely fire resistant and is resistant to extreme weather conditions. It has a 50-year lifespan and offers a 10-year limited warranty. The product is also Energy Star rated. While these types of windows can not be recycled, they are fully biodegradable.

The main disadvantage of these windows is that they can not be recycled and that there is currently no triple-glazing window option available for this product. If this changes over time, this will be a great option for all buildings.

KEY FEATURES:

• Fiberglass material
• Fully biodegradable
• Excellent thermal and insulating performances
• 10-year limited warranty

ADDITIONAL INFORMATION
PRODUCT PAGE | SPEC SHEET

#6: PELLA 250 SERIES VINYL WINDOWS

Pella Vinyl Windows

These Pella windows are made of vinyl and have relatively good values for vinyl windows. As well as this, they are sold in both double and triple configurations. The product has good fire resistance and is also resistant to mold and rot. They possess an average lifespan of 20-years and a 10-year limited warranty is offered with this product. Further, these windows are Energy Star rated and are fully biodegradable.

These window’s main disadvantage is that they can not be recycled.

KEY FEATURES:

• Vinyl material
• Fully biodegradable
• Double and triple configurations
• 10-year limited warranty

ADDITIONAL INFORMATION
PRODUCT PAGE | SPEC SHEET

#7: PELLA ARCHITECT SERIES WOOD WINDOWS

Pella Architectural Series Wood Windows

These Pella windows are made of wood and have great performance values for double windows. The product is fully recyclable and has a great aesthetic appearance. When taking good care of these windows, a 50-year lifespan can be achieved and there is a 10-year limited warranty on this product. These windows are Energy Star rated and are recyclable and fully biodegradable.

The main disadvantage of these windows is that they are not as resistant to fire and that they are quite costly.

KEY FEATURES:

• Wood material
• Fully recyclable and biodegradable
• Great thermal and insulating performances
• 10-year limited warranty

ADDITIONAL INFORMATION
PRODUCT PAGE | SPEC SHEET

#8: ANDERSEN FIBERGLASS A-SERIES WINDOWS

Anderson Fiberglass A Series Windows

These windows have the advantage of good sustainability features combined with a responsible manufacturer. The fiberglass construction is highly effective at insulation and some variants of the window qualify for Energy Star certification in all regions of the US and Canada. The windows have good performance values as well as great fire resistance. On top of that, these windows can last for over 40 years and have a 10-year limited warranty. They are also fully biodegradable.

The main disadvantage of these windows is the extremely high price. They also don’t have a triple window option.

KEY FEATURES:

• Fiberglass material
• Fully biodegradable
• Excellent thermal and insulating performances
• 10-year limited warranty

ADDITIONAL INFORMATION
PRODUCT PAGE | SPEC SHEET

#9: MILGARD THERMALLY IMPROVED ALUMINUM A250 WINDOWS

Milgard Thermally Improved Aluminum A250 Windows

These Milgard windows are made of Aluminum and have an incredibly narrow frame in combination with decent performance values for double windows. The product is extremely fire resistant and is also resistant to extreme weather conditions. The windows have a 50-year lifespan and there is a 20-year limited warranty on this product. They are Energy Star rated and can be fully recycled. On top of that, this is a relatively cheap window option.

The main disadvantage of these windows is that aluminum mining is extremely polluting and unsustainable. Additionally, there is currently no triple-glazing window option available.

KEY FEATURES:

• Aluminum material
• Fully recyclable
• Good insulating performances
• 20-year limited warranty

ADDITIONAL INFORMATION

PRODUCT PAGE | SPEC SHEET

SUSTAINABILITY BENCHMARKING
THE TOP FAUCET COMPANIES

We researched six faucet companies. Each company was benchmarked looking at five different categories of sustainability. These consisted of: (1) if there was a sustainability presence on their website (2) if there was a current sustainability report on their website or available to the public (3) what are their sustainability goals (4) what are their sustainability initiatives and (5) what partnerships/collaborations do they have with other organizations. Taking all of this data into consideration, we were able to rank them from most sustainable to least. Sloan was the most sustainable company, but not far behind was Toto. The third most sustainable was Kohler, next was GROHE, Moen, and then American Standard coming in last and as the least sustainable faucet company.

Sustainability Benchmarking Research Google Spreadsheet – Click to open in a new tab

BEST WATER-SAVING FAUCETS WE COULD FIND BUYING DIRECT

Next, we researched the products available from each of the above companies. The spreadsheet below shows the faucets we found best from over 20 additional hours researching everything available direct from the company websites as of September 2019. We chose these faucets based on their energy and water-saving technology and other features we felt would make them enjoyable to use. Details are below for the specifics of each model, direct links to the products pages, specification sheets, and more.

Best Water-saving Faucet Products Research Google Spreadsheet – Click to open in a new tab

NOTE: New technology is always being invented, check the company websites for their newest models. Even as this page becomes dated, the featured products below can be used as a good base-level starting point for your selection process. We wouldn’t recommend any product that doesn’t meet or surpass the quality and performance of the products listed here. This is how we intend to use this page as we build the Duplicable City Center and 7 sustainable village models. If better products are found when we start making our purchases, we’ll open source share here what they are and our personal experience using them. 

#1 MOST SUSTAINABLE FAUCET COMPANY: SLOAN

The two most sustainable companies, Sloan and Toto, were close for the most sustainable company because they both had highly detailed sustainability sections on their websites. They also had current sustainability reports and efficient products with sustainable technologies built into them. Sloan was chosen as the number one choice of these two because they had the most updated sustainability report. It was from the current year and impressively comprehensive. We found Sloan to be a very transparent company that shares a lot about what they are doing in regards to sustainability within their company and in their products technologies. As one example, they use Environmental Product Declarations (EPD) on all of their products to show the effects these products have on the environment through the product’s entire life cycle. They provide individual reports on each faucet with this information. They are also committed to being LEED v4 compliant.

Additionally, Sloan is partnered with Arbor Day, a sustainable organization that plants trees to offset the carbon footprint of the products Sloan creates. Sloan computes the carbon footprint of a product and then Arbor Day offers reforestation credits to offset this footprint. Sloan partners with many other sustainability-focused organizations too, like WaterSense (a program within the EPA), The Water Council, and the Alliance for Water Stewardship. For the full list of Sloan’s partners, take a look at the Benchmarking Tab on our research spreadsheet.

TOP SLOAN FAUCET PRODUCTS

Here are the best water-saving faucets we found from Sloan. Keep in mind that these are the best products as of September 2019. New designs are constantly being created but this list can still be used as a baseline for comparison even as it becomes dated. We wouldn’t recommend any new product that doesn’t at least meet the performance standards of the products listed here. We will also add to this page our top choices purchased (best on the market at that time) as we build the Earthbag Village, Duplicable City Center, and other 6 sustainable village models. So expect this page to evolve for many years.

#1 :: SLOAN OPTIMA: EAF-350 (CODE #: 3335110)

With Sloan ranked as our #1 sustainable company for faucets, it was certainly difficult to pick our top choice from their array of great, sustainable faucets. While Sloan has countless fantastic faucet options that would all be excellent choices, we did a deep dive paying close attention not only to the primary features but also the secondary and tertiary to deduce our #1. After much consideration, we have chosen the Sloan Optima: EAF-350 as our top choice. The greatest edge that this model had over the other Sloan models considered is that this 0.35 GPM model has several customizable features, namely the option to add the carbon offset feature. This boosted its sustainability points in our book. Additionally, this model is battery powered with a battery that has a service life of 3 years at the average usage of 8,000 cycles per month. This model also has an optional power harvesting feature which significantly extends the battery’s service life even further. The EAF-350 comes with a bi-stable magnetic solenoid valve for increased energy savings too. Lastly, we contacted them and confirmed that this faucet has a ‘timeout’ setting (how long it will run continuously with motion present) of 10 seconds and a ‘follow-up’ time (how often the sensor will check to see if a target is present) default set to 1 second and adjustable in the field to be between 0-10 seconds. This is fantastic for eliminating wasted water.

KEY FEATURES

• Flow Rate: 0.35 GPM (1 Lpm)
• Spray Type: Multi-Laminar (MLM)
• Sensor Type: Infrared (IR)
• Mounting Type: Single Hole
• Power Supply: Battery (BAT)
• Factory Default Timeout: 10s (not adjustable)
• Factory Default Follow-up Setting: 1s (adjustable to 0 seconds to 10 seconds)
• Factory Default GPC: 0.058
• Double Infrared Sensor with Automatic Setting Feature and Microprocessor
• Bi-Stable Magnetic Solenoid Valve (for increased energy savings)
• Adjustable Hot Water Limit Set (with ISM Mixer)
• Water Supply Connection with Flexible High-Pressure Hose and Strainer
• 6V Lithium CR-P2 Commercial Battery included
• IR-Click and IQ-Click features permits activation of continuous run and temporary off modes
• Battery Life: 3 years 8,000 cycles/month
• Optional power harvesting significantly extends service life
• Timeout Adjustment Settings: 10s

COMPLIANCES AND CERTIFICATIONS

ADA Compliant, ASME A112.18.1 Compliant, BREEAM Materials Credit, BREEAM Water Credit, CalGreen Compliant, Carbon Neutral, CEC Compliant, cUPC Certified, cUPC Low Lead Compliant, EPD, Green Globes Materials & Resources Credit, Green Globes Water Credit, HPD, LEED Materials & Resources EPD Credit, LEED Materials & Resources HPD Credit, LEED V4 Water Efficiency Credit, NYC604.4, Proposition 65, Satisfies LEED Credits, TAS, UPC Certified, UPC Low Lead Compliant.

ADDITIONAL INFORMATION

PRODUCT PAGE | SPEC SHEET

#2 :: SLOAN OPTIMA: EAF-200 (CODE #: 3335164)

The Optima EAF-200 is almost identical to the Optima EAF-350 that we voted #1. The main difference between the EAF-200 and the EAF 350 is that the 200 is hardwired power supply as opposed to the 350 being battery powered. The EAF-200 also appears to lack the bi-stable Magnetic Solenoid Valve. Since this valve provides energy savings for the EAF-350, and the EAF-200 lacks it, we ranked it lower. Other than this one feature, the EAF-200 is still a fantastic faucet with the all the other amazing features, certifications, and compliances as the EAF-350 (including the carbon offset option, which not many other Sloan faucets seem to have).

KEY FEATURES

• Flow Rate: 0.35 GPM (1 Lpm)
• Spray Type: Multi-Laminar (MLM)
• Sensor Type: Infrared (IR)
• Mounting Type: Single Hole
• Power Supply: Hardwired Less Transformer (HLT)
• Temperature Mixer: Mixer Not Included (but can be added)
• Factory Default Timeout: 30s
• Factory Default GPC: 0.175
• Double Infrared Sensors with Automatic Setting Feature and Microprocessor
• Automatic Self-adapting Sensor Technology
• Magnetic Solenoid Valve
• 6 Volt DC Plug-in Adapter
• IQ-Click feature permits activation of continuous run and temporary off modes

COMPLIANCES AND CERTIFICATIONS

ADA Compliant, ASME A112.18.1 Compliant, BREEAM Materials Credit, BREEAM Water Credit, CalGreen Compliant, Carbon Neutral, CEC Compliant, cUPC Certified, cUPC Low Lead Compliant, EPD, Green Globes Materials & Resources Credit, Green Globes Water Credit, HPD, LEED Materials & Resources EPD Credit, LEED Materials & Resources HPD Credit, LEED V4 Water Efficiency Credit, NYC604.4, Proposition 65, Satisfies LEED Credits, TAS, UPC Certified, UPC Low Lead Compliant.

ADDITIONAL INFORMATION

PRODUCT PAGE | SPEC SHEET

#3 :: SLOAN OPTIMA: ETF-80 (CODE #: 3365321)

What’s unique about the ETF-80 is that the Sloan site actually lets you customize which compliances/certifications you want your faucet to be equipped with. In this regard it is one of the most customizable of the Sloan faucets because it lets the consumer prioritize which compliances and certifications are most important to them. While this is definitely a cool feature, it should be noted that all these Sloan faucets considered do come standard with many awesome and sustainable compliances and certifications, so it is hard to say how much of an edge this is. Other than that, it shares many of the same features as our #1 and #2 choice but lacks the carbon offset option, which is why it has ranked right below those models that do include it.

KEY FEATURES

• Flow Rate: 0.5 GPM (2 LPM)
• Spray Type: Multi-Laminar (MLM)
• Sensor Type: Infrared (IR)
• Mounting Type: 4″ Centerset
• Trim Plate: 4″ (102mm) (4)
• Power Supply: Box Transformer (BOX)
• Temperature Mixer: Above Deck Mixer (ADM)
• Finish: Polished Chrome (CP)
• Factory Default Timeout: 30s
• Factory Default GPC: 0.25

Compliances/Certifications vary based on customization..

PRODUCT PAGE

#4 :: SLOAN OPTIMA: ETF-600 (CODE #: 3365773) / ETF-610 (CODE #: 3365166)

These two models are exactly the same except that the 610 has a Plug Adapter power supply while the 600 has a Box Transformer power supply. They are great faucets but have ranked #4 because they don’t have the carbon offset option that #1 and #2 have, and it is not as customizable as #3. With that said, it’s notable (and impressive) that all of our top Sloan faucets are very similar and we have only been able to differentiate them based on the intricate details like these that may or may not be super influential when making a purchasing decision.

KEY FEATURES

• Flow Rate: 0.35 GPM (1 LPM)
• Spray Type: Multi-Laminar (MLM)
• Sensor Type: Infrared (IR)
• Power Supply: Box Transformer (BOX)
• Temperature Mixer: Back-Check Tee (TEE)
• Factory Default Timeout: 30s
• Factory Default GPC: 0.175

COMPLIANCES AND CERTIFICATIONS

ADA Compliant, ASME A112.18.1 Compliant, BREEAM Materials Credit, BREEAM Water Credit, CalGreen Compliant, Carbon Neutral, CEC Compliant, cUPC Certified, cUPC Low Lead Compliant, EPD, Green Globes Materials & Resources Credit, Green Globes Water Credit, HPD, LEED Materials & Resources EPD Credit, LEED Materials & Resources HPD Credit, LEED V4 Water Efficiency Credit, NYC604.4, Proposition 65, Satisfies LEED Credits, TAS, UL Certified, UPC Certified, UPC Low Lead Compliant.

ADDITIONAL INFORMATION

600 PRODUCT PAGE | 610 PRODUCT PAGE

#5 :: SLOAN: SF-2100, 2200, 2300, 2400

These four models are exactly the same to each other and almost exactly the same to #1-4 above. They have only scored lower than the ETF 600/610 because they have less compliances and certifications listed on their respective spec sheets than the 600/610 models. They are all still great products though that offer the same low .35 GPM flow rates, low-lead compliance, and LEED Credits for anyone seeking LEED certification like we are.

KEY FEATURES

• Flow Rate: 0.35 GPM (1 LPM)
• Spray Type: Multi-Laminar (MLM)
• Sensor Type: Infrared (IR)
• Power Supply: Plug Adapter (PLG)
• Temperature Mixer: Back-Check Tee (TEE)
• Factory Default Timeout: 30s
• Factory Default GPC: 0.175

COMPLIANCES AND CERTIFICATIONS

ADA Compliant, ASME A112.18.1 Compliant, BREEAM Water Credit, CalGreen Compliant, CEC Compliant, cUPC Certified, cUPC Low Lead Compliant, Green Globes Water Credit, NYC604.4, Proposition 65, Satisfies LEED Credits, TAS, UPC Certified, UPC Low Lead Compliant.

Sloan: SF-2100 (Code #: 3362111) Spec Sheet
Sloan: SF-2200 (Code #: 3362153) Spec Sheet
Sloan: SF-2300 (Code #: 3362115) Spec Sheet
Sloan: SF-2400 (Code #: 3362178) Spec Sheet

#2 MOST SUSTAINABLE FAUCET COMPANY: TOTO

Toto was the second most sustainable company. What made them number two is that they had a less-updated version of their sustainability report and Sloan shared more about their products’ sustainable technology. It was a very close choice though. Like Sloan, Toto has a very comprehensive sustainability presence on their website. From company training to the principles and goals of Toto, they are very focused on the environment. The United Nations’ Sustainable Development Goals (SDGs) are integrated into their practices and they also have many sustainability related company goals they are seeking to achieve. Toto looks at six themes of global environmental activities: (1) Conserving water, (2) Preventing global warming, (3) Conserving natural resources, (4) Keeping the Earth clean, (5) Conservation of biodiversity, and (6) Contribution to local communities. They explain very comprehensively how they address all of these issues through their supply chain manufacturing of their products’ cradle-to-grave sustainable life cycle. Using their due diligence and legal compliance towards the environment, they are working towards being a highly sustainable company. They are also LEED v4 compliant and have earned many philanthropic awards over the years. The company also partners with Sustainable Minds, which is a software and information company that looks to integrate and innovate through environmentally-sustainable product design.

TOP TOTO FAUCET PRODUCTS

Here are the best water-saving faucets we found from Toto. Keep in mind that these are the best products as of September 2019. New designs are constantly being created but this list can still be used as a baseline for comparison even as it becomes dated. We wouldn’t recommend any new product that doesn’t at least meet the performance standards of the products listed here. We will also add to this page our top choices purchased (best on the market at that time) as we build the Earthbag Village, Duplicable City Center, and other 6 sustainable village models. So expect this page to evolve for many years.

#1 :: TOTO STANDARD ECOPOWER^® FAUCET (TEL103 Series)

We are a big fan of these Toto products because they use “Ecopower” rather than requiring a hardwired connection, batteries, etc. Ecopower “harnesses the energy of running water to power itself.” It should be noted that all of these Toto products had almost the exact same features on their spec sheets. The only differences that we were able to identify may not actually be very influential in consumer decision-making. Because each of these products are so similar, the most significant difference was cost. Therefore, since they all have the same features, those that offered these features at a cheaper price were ranked higher. Thus we have ranked the Toto Standard EcoPower Faucet as #1 because it is around 30%+ cheaper than other models with identical features. It has a flow rate of 0.35 GPM, uses the flow of water to power itself (Toto’s “EcoPower” — no need for external power source), and is equipped with an infra-red sensor to ensure water is only released when a user activates it. Additionally, the Standard has Vandal resistant aerator housing, which only one other model seems to have (the Libella™ models). Thus since all the top Toto products are almost identical, and the Standard is significantly cheaper, we have ranked the Standard #1.

PRODUCT PAGE | SPEC SHEET

#2 :: LIBELLA™ LINE OF FAUCETS

Same exact features as the standard, but $200-300 more expensive for the body style. See the Faucet Spreadsheet for feature specifics and options.

PRODUCT PAGES | MODEL-SPECIFICS SPREADSHEET

#3 :: HELIX™ LINE OF FAUCETS

This line of faucets are described as “designed for high-traffic spaces.” Seeing as the key features appear to be exactly the same as the standard also, this must be in reference to the body style. The prices of the assorted models range from about $800-950. See the Faucet Spreadsheet for feature specifics and options.

PRODUCT PAGES | MODEL-SPECIFICS SPREADSHEET

KEY FEATURES FOR ALL OF THE ABOVE

• Self-generating hydro-powered EcoPower system
• No minimum daily usage requirement
• Micro-sensor positioned underneath the spout head for accurate hand detection ensuring smooth and consistent water distribution
• Vandal resistant aerator housing
• Durable chrome plated spout body
• Single-hole mount
• Kit includes spout body, controller box , and mounting hardware – less supply lines
• 0.35 GPM aerated flow option
• Contributes to earning LEED^® credits

CODES/STANDARDS FOR ALL OF THE ABOVE

• Operates below federally mandated consumption limit of 0.25 gpc
• Complies to California Green Building Code, CALGreen of 0.20 gpc
• Meets or exceeds ASME A112.18.1M/CSA B125.1, and NSF372-2011
• Certifications: IAPMO(cUPC), State of Massachusetts, and others
• California Green Code and City of Los Angeles Water Efficiency Ordinance
• ADA compliant
• Complies with federal and state statutes as low-lead (contains a weighted average of 0.25% lead or less)

PRODUCT PAGE | SPEC SHEET

#3 MOST SUSTAINABLE FAUCET COMPANY: KOHLER

The third most sustainable company was Kohler. This company was chosen for the third spot because they didn’t have the most updated sustainability report, but they still had an abundant sustainability presence on their website. They had many goals towards their commitment to the environment through working towards a net-zero environmental impact by 2035. Kohler also looks to the United Nations’ SDGs and has many community outreach programs focused on water conservation and projects that they have created around the nation. Similar to Sloan, they also have adopted Kohler’s Environmental Product Declarations (EPDs) that create a level of transparency by labeling the products’ life cycle through the entire supply chain. They are also a LEED certified company. A very impressive current initiative they have is a solar panel farm in South Carolina that has more than 4,000 solar panels that produce 1,000 kilowatts of power and offsets the amount of power supplied by their local utility by 9%. That is not a huge contribution, but it is something that shows that they are more committed than many to being a sustainable company. They have many partners, some to note are: WaterSense EPA, Habitat for Humanity, Harvard Center for Climate, Health, and Global Enterprise, The Water Council, and Rotary International. For the full list of Kohler’s partners, take a look at the Benchmarking Tab on our research spreadsheet.

TOP KOHLER FAUCET PRODUCTS

Here are the best water-saving faucets we found from Kohler. Keep in mind that these are the best products as of September 2019. New designs are constantly being created but this list can still be used as a baseline for comparison even as it becomes dated. We wouldn’t recommend any new product that doesn’t at least meet the performance standards of the products listed here. We will also add to this page our top choices purchased (best on the market at that time) as we build the Earthbag Village, Duplicable City Center, and other 6 sustainable village models. So expect this page to evolve for many years.

#1 :: KOHLER K-7516-CP

All of the Kohler options listed below have Kohler’s Insight Technology, which is described on their website as “… an adaptive infrared sensor that gathers and analyzes the surrounding area upon installation. After recording these details, Insight calibrates the sensor to filter false triggers and optimize the faucet’s operation.” We like that all these faucets will gather data to decrease the number of times in which the sensor is mistakenly activated. We chose the K-7514 and K-7516 models as our #1 models because they both have a key feature that sets them apart from the other brands, namely that they are the only ones from these top products that are powered by a 30-year hybrid energy cell. They are both .5 GPM faucets though, not as conservation-minded as the .35 GPM faucets above.

KEY FEATURES

• 0.5 GPM (1.9 l/min) flow rate
• Factory set 30 second max. continual run cycle
• Vandal-resistant aerator
• 24″ (610 mm) flexible supply hoses for easy installation
• 5-5/16″ (135 mm) spout reach
• Less drain
• Less temperature mixer
• Powered by the 30-year hybrid energy system
• Insight™ adaptive infrared technology
• Waterproof shroud protects electronic components
• Water-saving vandal-resistant 0.5 GPM aerator

PRODUCT PAGE | SPEC SHEET

#2 :: KOHLER K-7514-CP

The KOHLER hybrid energy system is a first-of-its kind 30-year power solution for touchless faucets. When combined with Insight Technology, this system provides an environmentally-friendly, virtually maintenance-free electronic faucet. We ranked this faucet below the 7516 model because it wasn’t listed as having a “Factory set 30-second maximum continual-run cycle.”

KEY FEATURES

• 0.5 GPM (1.9 l/min) flow rate
• Above-counter valve for easy installation and maintenance
• Vandal-resistant aerator
• 5″ (127 mm) spout reach
• Without temperature mixer
• Includes 30-year Hybrid Energy Cell
• Less drain
• Powered by the 30-year hybrid energy system
• Insight™ adaptive infrared technology
• Waterproof shroud protects electronic components
• Water-saving vandal-resistant 0.5 GPM aerator

PRODUCT PAGE | SPEC SHEET

#3 :: KOHLER “PURIST” K-T11837-CP

The Purist K-T11837-CP is definitely very similar the the #1 option with the main difference being that this one is hardwired rather than powered by a long-lifetime energy cell. The main reason it has ranked lower is because it does have the option to be left on continuously for about 30 seconds, which could be a hindrance to water conservation if abused. It is unclear if this is setting is able to be customized. Also it should be noted that this is the only Kohler faucet from our top selections that has Safe Drinking Water Act (SDWA- Low Lead) compliant in spec sheet. This is not to say that the others do not have this compliance, but this is the only one that explicitly mentions it.

KEY FEATURES

• 0.5 gal/min (1.9 l/min) flow rate
• This is trim set only. It requires valve kit to complete the faucet
• Vandal-resistant aerator
• 8-1/4″ (210 mm) spout reach
• Less drain
• Safe Drinking Water Act (SDWA- Low Lead) compliant
• On demand on and off. Valve kit is factory set to 30 second max. continual run cycle if it turned on continuously
• Valve kit has electronic Insight™ Sensor Technology for accurate and consistent activation
• This trim set can be used with 11830-NA (Hybrid power) wall mount valve or 11843-NA (AC Power) wall mount valve

PRODUCT PAGE | SPEC SHEET

#4 MOST SUSTAINABLE FAUCET COMPANY: GROHE

GROHE is the fourth most sustainable company on this list. Of the companies that had a sustainability report, theirs was the least updated – from 2015/2016. They are, however, a very sustainable company that has pushed forward with many sustainable innovations for their products and that is why they are ranked at number four. This company takes a comprehensive look at how they can be sustainable through their products and through the workplace. They are committed through their products, processes of creating the products, employees being trained, taking their customers safety and health into consideration with the products, suppliers and service producers of where they get their raw materials for their products, and their level of social responsibility. This company has created “GROHE’s Sustainability Policy,” which looks at policies that consist of principles and guidelines for sustainable action. They have also created the GROHE EcoJoy Technology line that are products specifically designed to conserve water and energy. And on their website they offer a water/energy calculator that computes the costs and benefits of each product. They are also under the LIXIL Net Zero Program that looks to offset greenhouse gas emissions. LIXIL is a Japanese building and housing company that, over the years, has expanded internationally and acquired many companies such as GROHE and American Standard (which is also in this list, but later on).

TOP GROHE FAUCET PRODUCTS

Here are the best water-saving faucets we found from GROHE. Keep in mind that these are the best products as of September 2019. New designs are constantly being created but this list can still be used as a baseline for comparison even as it becomes dated. We wouldn’t recommend any new product that doesn’t at least meet the performance standards of the products listed here. We will also add to this page our top choices purchased (best on the market at that time) as we build the Earthbag Village, Duplicable City Center, and other 6 sustainable village models. So expect this page to evolve for many years.

#1 :: GROHE EUROSMART COSMOPOLITAN E AND GROHE EUROPLUS E

Like the other companies, the GROHE top-of-the-line faucets were all very similar to each other. All of the GROHE products evaluated have a battery service life of up to seven years (150 cycles/day). Additionally, they are all easy to switch between lithium battery (6 V) and mains supply (230 V). They also have safety shut-off after 60 seconds, adjustable between two and 420 seconds. They also come standard with a temperature mixer. What sets the Eurosmart Cosmopolitan E and the Europlus E models above the rest is that they have the option to add the GROHE Powerbox. The GROHE Powerbox harnesses the flow of water as an energy supply. This is how it works: “A turbine in the power box is driven by the water supply each time the fitting is operated. This converts kinetic energy into electrical energy and stores it to operate the infrared electronics. Using the generator for as little as 60 seconds delivers enough electricity to power the fitting for 24 hours.” The Powerbox also has a service life of 10 years, this helps reduce required maintenance and lowers operating costs.

KEY FEATURES

• Faucets group I (DIN 4109)
• Flow pressure min. 0.5 bar/recommended one to five bar
• Flow rate 5.7 l, pressure-independent
• Hot water stop-valve
• Cleaning mode via sensor
• Plug and play: easy to switch between lithium battery (6 V) and mains supply (230 V)
• Battery service life of up to seven years (150 cycles per day)
• High IP protection class for one hole mixers IP 59K
• Battery voltage indicator through sensor
• Individual setting for automatic flushing and thermal disinfection
• Protection against scalding – stops automatically when a hand approaches
• Safety shut-off after 60 seconds, adjustable between two and 420 seconds
• Program selection (seven programs), manual or remote control
• Battery compartment in non-visible area below the wash basin for ease of maintenance
• Can be combined with Grohtherm Micro
• Vandalism-protected rotation lock (can be retrofitted)

PRODUCT PAGE

#2 :: GROHE ALLURE E AND ESSENCE E

The Allure E and Essence E are also really great faucet options from Grohe. Their features are almost exactly identical to each other, with the main difference being the body style. They have a flow rate of 0.5 GPM and are equipped with a sensor that can be configured to shut off as quickly as 2 seconds after a user is no longer detected. They have ranked below the Europlus E and Eurosmart Cosmopolitan E because the Allure E and Essence E are not compatible with the Grohe Powerbox.

KEY FEATURES

• Faucets group I (DIN 4109)
• Flow pressure min. 0.5 bar/recommended one to five bar
• Flow rate 6 l; pressure-independent
• Hot water stop-valve
• Cleaning mode via clip
• Mains (230 V) and lithium battery (6 V)
• Battery service life of up to seven years (150 cycles per day)
• High IP protection class: IP 59K certification
• Individual setting for automatic flushing and thermal disinfection (remote control)
• Safety shut-off after 60 seconds; adjustable between two and 420 seconds
• Battery voltage indicator (remote control)
• Solenoid valve and battery in the mixer body
• Vandalism-protected rotation lock (can be retrofitted)
• Can be combined with Grohtherm Micro

PRODUCT PAGE

#5 MOST SUSTAINABLE FAUCET COMPANY: MOEN

The fifth most sustainable company is Moen. This company is ranked number five because it did not have as robust of a sustainability presence on their website as the other companies observed. Of course, they are still a sustainable company because they made the list, but when being ranked with the chosen companies in this list, they were not the top choice. They do have many initiatives that are noteworthy, such as how all of their faucets are certified to meet the WaterSense EPA standard criteria by using up to 32% less water than a conventional faucet. Their most recent waste reduction and recycling initiatives include recycling nearly 82% of waste from their manufacturing process and almost 20% of all water used. Also, more than 74% of Moen’s production (in dollar terms) was made from raw materials that included some amount of recycled material. In addition to this, recycling more than 13 million pounds of metal, 6.5 million pounds of cardboard, 3.8 million pounds of solid waste, only using recycled paper and soy-based inks for copies.

TOP MOEN FAUCET PRODUCTS

Unfortunately the Moen website only offered a few faucet options equipped with sensors, all three of which were kitchen faucets. Thus all the bathroom faucet options have no sensors and would not be able to be set to turn off after a specified amount of time. Additionally, we were not able to find any models that were below 1.0 GPM. Our criteria specified that in order to be considered sustainable the faucet would need to be below 0.5 GPM, or if not, have the ability to add a water saving nozzle. Moen did not meet our standards as it was over 0.5 GPM and did not have sensors, therefore no Moen products were considered.

#6 MOST SUSTAINABLE FAUCET COMPANY: AMERICAN STANDARD

The sixth most sustainable company is American Standard. Being a classic faucet company that was formed from Crane Plumbing, a company that was founded in 1906, it is surprising that American Standard would be ranked last on this list. They came short in many different sustainability and environmental areas. For instance, they did have a sustainability section on their website, but it was very small and insignificant. It didn’t explain a lot of what they are doing in regards to initiatives or goals through sustainable measures. Also, there was no specific sustainability report found for this company, which shows that American Standard does not have a commitment to providing a transparent report for its stakeholders and the public to see all that they are doing in the sustainability and environmental arena. The only impressive aspect regarding sustainability that we could find on their website or for their products was water-savings calculators to compute how much you could save commercially and residentially for each product on their website. Also, there were no sustainability partners listed on their website, showing that they are not interested in collaborating with other sustainable organizations for various initiatives, programs, and/or goals. Even though they fell short of the others though, we included them here at the end because we still thought they were sustainable and environmentally conscious enough through good business practices and building sustainability into their workplace and overall company. Just not to the extent that the other five companies were.

TOP AMERICAN STANDARD FAUCET PRODUCTS

Being the lowest-ranked company on our list, we only included one water-saving faucet from American Standard. This was their best product as of September 2019. New designs are constantly being created but the product below can still be used as a baseline for comparison even as this page becomes dated. We wouldn’t recommend any new product that doesn’t at least meet the performance standards of the product below though. We will also add to this page our top choices purchased (best on the market at that time) as we build the Earthbag Village, Duplicable City Center, and other 6 sustainable village models. So expect this page to evolve for many years.

#1 :: AMERICAN STANDARD 702B305.002 and 7025303.002

Though American Standard is #6 on our list, they still have some really great offerings. We have chosen 702B305.002 and 7025303.002 as our #1 from them because they share the same features, namely providing a flow rate of 0.5 GPM. It is equipped with an infrared sensor just like all of our top products. It has above-deck mixing and uses a built in thermostat to maintain temperature (though hot and cold water come from separate inlets). It meets ASSE 1070, ADA, CALGreen, WaterSense certifications.

KEY FEATURES

• 0.5 gpm pressure compensating, vandal-resistant multi-laminar spray
• SmarTherm® Safety Shut-Off: Integral thermostatic hot water temperature limiter meets ASSE 1070 without a separate thermostatic mixing valve
• Above-Deck Mixing: Allows user to manually adjust temperature. Adjustable hot limit stop. Red & blue indicators
• Removable Mixing Handle: Installer can set temperature and remove handle to prevent user adjustment. Cover plug included
• Dual Inlets: For hot and cold water. Check valves included to prevent cross flow. Filter assemblies protect the solenoid valve from debris
• Hygienic, touch-free operation
• Clean, Integrated Design: All electronics contained in faucet spout. No control box below deck
• Easy Installation & Maintenance: Faucet installs from the top. All serviceable parts are easily accessible
• Flexible Selectronic® Platform with programmable sensor and interchangeable power supplies
• Self-Cleaning Solenoid Reduces Maintenance: Integral wiper spring prevents clogging and run-on. Silicon seals
• Adjustable Range: Detection zone can be adjusted manually or with optional remote control
• Fail-Safe: Faucet automatically shuts off upon loss of power or dead battery. No reset required
• Optional Remote Control Allows for Customization: Auto Purge: Periodically purges stagnant water from faucet and supply lines
• Timing is adjustable with optional remote control. Safety Timer: Turns water off if the sensor is blocked for 55 seconds. Timing is adjustable with optional remote control
• Lead-Free: Faucet contains ≤ 0.25% total lead content by weighted average

PRODUCT PAGE

BEST WATER-SAVING FAUCETS
WE COULD FIND ON CONSUMER SITES

The following faucets were selected from over 10 hours researching everything available on the online consumer market as of March 2019. We chose these faucets and accessories to share the diversity that is available and based on current water-saving technology, a thorough assessment of the available internet reviews, price, durability, and features we felt would make them enjoyable to use. There are many many more than what we’ve listed here, so we tried to choose one from each of the various design options and explain why we ranked them as we did to highlight the functionality differences. Other water-saving faucets exist and new designs are constantly being introduced, so we suggest you use the suggestions below as a guide, find the features you like most, and then explore the huge diversity of different manufacturers to find the look and function perfect for your project.

#1 :: SLOAN SF-2450 ELECTRONIC COMMERCIAL FAUCET

The Sloan SF-2450 Faucet was chosen as our #1 choice because it has the option of a built-in .35 of 0.5 GPM flow rate, runs water only while the person is activating the sensor, and gives us the ability to use a fixed water temperature. The model is also ADA compliant, offers a non-aerated spray head, and is a very hygienic option because its automatic function means no touching of the buttons. Other features include an adjustable sensor range, a splash-proof circuit control module that is a part of the faucet, and a filtered solenoid valve with a serviceable strainer filter. It can be hardwired in or can run on four AA batteries that will provide 2 years of use at 8,000 cycles/month. It’s also from the #1-ranked company identified during our sustainability benchmarking process.

KEY FEATURES

• LEED v4 Compliant
• Laminar or Aerated Spray Types
• Option of a built-in .35 of 0.5 GPM flow rate
• Runs water only while the person is activating the sensor
• Hardwire it or runs on 4 AA batteries to provide 2 years of use at 8,000 cycles/month
• Has a filtered solenoid valve with serviceable strainer filter
• It has an adjustable infrared sensor range
• It is ADA compliant
• Temperature control options include a back-check tee (TEE) or below-deck manual mixing valve

PROS/CONS COMMENTS

• “Perfect for half baths”
• “The standard for electronic faucets”
• “The real deal – Quality!”
• “So much quieter than the one we had before”
• “Five Stars”
• “As Expected”

ADDITIONAL INFORMATION

Company Website | Faucets.com | Amazon | Spec Sheet | Other Options Brochure

#2 :: MELO AUTOMATIC SENSOR FAUCET

The Melo Automatic Sensor Faucet was chosen as our #2 choice because it has an adjustable time option, but we don’t consider this as efficient as our auto-off choice above. Like all the choices here, this faucet is completely motion detection operated and the adjustable factory setting comes set to 30 seconds. We liked the “smart” aspect of this faucet, using a sensitive sensor with infrared AI Smart-Chip for a non-dripping design and the ability to self-adjust for its best detection zone as per the color and shape of your lavatory. This faucet can be used commercially or for residential use, has a 360 degree rotating neck, and is ADA compliant. It also runs on 4 AA alkaline batteries that can be used for 2 years at 200 cycles a day.

KEY FEATURES

• 4AA alkaline batteries can be used for 2 years at 200 cycles a day
• Sensitive sensor with infrared AI Smart-Chip for non-dripping design
• The faucet can be adjusted for how long to run
• 100% Touch-free operation
• 360 degree rotating neck
• ADA Compliant
• Flashing light indicators for power up, low battery, and solenoid function
• Intelligent: with its micro-computer controlling its action, the faucet can self adjust its best detection zone as per the color and shape of lavatory

PROS/CONS COMMENTS

• “Super easy to install”
• “This sensor faucet worked as expected”
• “Sensor issues”
• “Perfect”
• “This is exactly what I wanted for the bathroom upstairs”

ADDITIONAL INFORMATION

Purchasing and Specifications | Purchasing on Amazon

#3 :: SLOAN OPTIMA SOLIS SOLAR-POWERED SENSOR-ACTIVATED FAUCET

We chose the Sloan Optima Solis Solar-powered Sensor-activated Faucet as our #3 choice because it works with ambient light, like a solar-powered calculator. Its integrated power plant storage cell transforms light from any source into electrical energy. This helps to achieve LEED credit points by conserving energy and water, making it ideal for “green” building. It regulates water flow using an electronic sensor that automatically turns water on/off and has an integral temperature control for hot or cold water operation with integral spout temperature mixer. It does not have an adjustable time or sensor range option though. It’s also from the #1-ranked company identified during our sustainability benchmarking process.

KEY FEATURES

• .5 or 1 gallon flow rate options
• Works with ambient light, like a solar-powered calculator
• Integrated power plant storage cell
• LEED v4 compliant
• Water temperature can be adjusted by the user
• Hot adjustable water limit set point
• Integral temperature control for hot or cold water
• Standby mode (option) permits light ring to remain illuminated with
  dim white light

PROS/CONS COMMENTS

• “These are some of the best faucets ever made”
• “Good ion battery that will last up to 10 years”
• “Engineering is prime”
• “Use very little water”
• “Great faucet”
• “Reliable faucet for kids bathroom”

ADDITIONAL INFORMATION

Company Website & Related Faucets | Purchasing on Amazon | Spec Sheet

#4 :: KOHLER K-13468-VS TOUCHLESS FAUCET

The Kohler K-13468 touchless faucet is #4 on our list because it comes standard with a .5 GPM flow rate, a 30-second max continual-run cycle, and adaptive infrared technology that gathers and analyzes the surrounding areas upon installation, records the details, and then calibrates the sensor to filter false triggers and optimize the faucets operation. Kohler has also been building products since 1873! A waterproof shroud protects electronic components and it is made with a vandal resistant aerator. One possible downside to this faucet is that it requires an AC power supply. It’s also from the #3-ranked company identified during our sustainability benchmarking process.

KEY FEATURES

• Requires an AC power supply
• 0.5 gal/min (1.9 l/min) flow rate
• Factory set to 30 second max continual-run cycle
• Waterproof shroud that protects electronic components
• Temperature control handle option on it
• It is AC Powered

PROS/CONS COMMENTS

• AC Power could be a pro or a con, depending on your preferences
• “It’s a nice faucet”
• “Well made”

ADDITIONAL INFORMATION

Click Here for the Company Website | Purchasing on Amazon | Spec Sheet

#5 :: FYEER FN0103S AUTOMATIC TOUCHLESS-SENSOR FAUCET

Fyeer has been designing quality kitchen, bath, and bar faucets for more than 20 years and the Fyeer automatic sensor touch-free faucet is no exception. The FN0103S Automatic Touchless-sensor Faucet is #5 on our list because it comes standard with a 2 GPM flow rate and a factory-set 60-second time out for water flow. These mean more water used and less sustainability (and definitely doesn’t qualify for LEED points), but may be desirable settings for others. So we’ve included this faucet here mainly to point out these features as something to be aware of and consider – and keeping in mind that a Faucet Accessory can probably be attached and fix this flow rate issue. Like several of the ones above, the sensor is powered by a 4-pack of AA batteries and the company says these will last for around 7,000 uses, or about 2 years for daily use. AC/DC power connections are available as an option too. It is ADA complaint.

KEY FEATURES

• It is an automatic sensor touch-free faucet
• 2 GPM flow rate – may be correctable with one of these Faucet Accessories
• Factory-set 60-second time out for water flow
• Sensor batteries last for around 7,000 times
• AC/DC power is an alternate option if batteries aren’t desired
• ADA Compliant

PROS/CONS COMMENTS

• We couldn’t easily find the spec sheet, so it’s not included in the links below
• “One year later, still working great!”
• “Great product”
• “Low price, looks great, performs well”
• “No need for expensive names here”
• “Unit looks good”
• “It’s magic”

ADDITIONAL INFORMATION

Company Website | Purchasing on Amazon

BEST WATER-SAVING FAUCET
ACCESSORIES WE COULD FIND

Our research also included identifying the best faucet accessories. These are great for upgrading your current faucet and, in many cases, can even be combined with the faucet recommendations above. While we’re talking accessories, it’s helpful to mention that the easiest way save water is to turn it off when not using it. Meaning turn it off while brushing teeth, soaping hands, etc. rather than letting it run. In most households this will save even more water than upgrading your faucet. Upgrading your faucet AND turning the water off when not in use saves even more.

#1 :: NEOPERL^® MIKADO WATER-SAVING FAUCET AERATOR INSERT

The NEOPERL^® Mikado Water-Saving Faucet Aerator Insert was chosen as our #1 choice because it uses the least amount of water at an impressive 0.35 GPM flow rate and only replaces the aerator part of a faucet. This means saving water and materials because you don’t end up throwing away (or indefinitely storing) your old faucet-aerator housing. This aerator also offers a distinctive flow pattern that the company says “will add elegance to any bathroom.” The replacement aerator fits most faucets with 15/16 in. -27 or 55/64 in. -27 housings and comes in a pack of 6 for $9.32 through Amazon.

KEY FEATURES

• Impressive .35 GPM flow rate
• Saves waste by only replacing the inside of the faucet housing, not the housing and the insides
• More affordable than most because it uses less materials by only replacing the insides
• Fits most faucets with 15/16 in. -27 or 55/64 in. -27 housings
• A distinctive flow pattern that “will add elegance to any bathroom”
• Dual-thread system accommodates both male and female faucet threads

PROS/CONS COMMENTS

• “Amazing!”
• “Saves so much water”
• “Affordable and easy to use”
• “Five star rating”
• Possible con for this: Make sure it fits your faucet housing

ADDITIONAL INFORMATION

Company Website | Purchasing on Amazon

#2 :: NEOPERL^® MIKADO ULTIMATE LOW FLOW

The NEOPERL^® Mikado Ultimate Low Flow also provides a 0.35 GPM flow rate, and is thus our #2 choice. Like the insert above, it also “turns the water stream into an eye-catcher when washing your hands. Its extraordinary, grid-like spray pattern – formed by individual water jets – creates a surprisingly clear and harmonious effect in its delicate design idiom. Given that owing to its form the spray loses density as it moves downwards, the force of the jets ranges from pleasantly soft to vigorously massaging. The visual effects of the water stream turn washing your hands into an enchanting experience.” It is also lead free and complies with the reduction of lead in the Drinking Water Act.

KEY FEATURES

• Impressive .35 GPM flow rate
• Beautiful and unique flow pattern
• Pressure compensating design
• Lead free
• Variable density spray providing soft to vigorous water
• Dual-thread system accommodates both male and female faucet threads

PROS/CONS COMMENTS

• “Extremely PLEASED!”
• “Nice flow and pattern”
• “Cool, but very low flow”
• “Five Stars”
• “Saves Water but Still an Effective Faucet”

ADDITIONAL INFORMATION

Company Website | Purchasing on Amazon

#3 :: NIAGARA 0.5 GPM LOW-FLOW FAUCET AERATOR

The Niagara Conservation 0.5 GPM Low-flow Dual-thread Faucet Aerator is our #3 choice because it has a 0.5 GPM flow rate, is affordable, and comes from Niagara Conservation, a very reputable and environmentally conscientious company with a long history (started in 1977) of quality products. It offers high pressure through an even “needle spray” pattern and flow-control construction using long-lasting Celcon plastic. The innovative dual-thread system also accommodates both male and female faucet threads/applications. The company states it saves up to 77% more water and energy than the standard 2.2 GPM aerator, which is approximately 18,615 gallons of water per year. The company is also a California Energy Commission Certified Member of the Water-Smart family of products. Sold on Amazon in packs of 6 for $9.95 and with free shipping.

KEY FEATURES

• .5 GPM flow rate saves up to 77% of water
• High-pressure “needle spray” pattern
• Long-lasting Celcon plastic
• Dual-thread system accommodates both male and female faucet threads
• Comes in packs of 6 so you can upgrade your whole house affordably

PROS/CONS COMMENTS

• “Extremely PLEASED!”
• “Nice flow and pattern”
• “Cool, but very low flow”
• “Five Stars”
• “Saves Water but Still an Effective Faucet”
• “We use these in our faucets and are very happy” – Community Pioneer Jae

Company Website | Purchasing on Amazon

#4 :: NEOPERL MULTIPLE LAMINAR STREAM BATHROOM FAUCET AERATOR

The NEOPERL^® Multiple Laminar Stream Bathroom Faucet Aerator has a flow rate of 0.5 GPM and is pressure compensating. This was our #4 choice because the NEOPERL company does not have the same impressive history of sustainability that Niagara does. Other than that though, it is pretty much tied with our #3 choice. The mini-shower spray pattern it provided may also be preferable for some, it offers full coverage and an even and consistent flow without quite as much force as the “needle spray” of the Niagara.

KEY FEATURES

• Flow rate of 0.5 GPM
• Pressure compensating
• Provides a non-splashing, non-aerated spray
• Medium-pressure (less than “needle spray”) mini-shower spray pattern
• Dual-thread system accommodates both male and female faucet threads

PROS/CONS COMMENTS

• “I actually like these…fits inside existing spouts.”
• “Good Product and Purchase!!!”
• “Perfect”
• “Four Stars”
• “Water-money savings”

ADDITIONAL INFORMATION

Company Website | Purchasing on Amazon

#5 :: ALTERED NOZZLE

The Altered Nozzle has a “Mist Mode” that allows it to save up to 98% of water, making it the most conservation-minded option for washing hands, brushing teeth, etc. It also has a “Save Mode,” which has savings up to 85% of water if someone needs more to fill a glass, pots, or pans. The reason this is our #5 choice though is because our Executive Director purchased this nozzle as part of the original Kickstarter and found it impractical. It works well enough for lightly wetting a washcloth or your toothbrush, but poorly to rinse a toothbrush or fill a glass. Turning it to “Save Mode” fixes these issues but it was difficult to twist back and forth. “Mist Mode” also made things around our sink wet because the mist was so fine, so we tended to leave it in “Save Mode.” After 6 months we switched to the Niagara Conservation 0.5 GPM Low-flow Dual-thread Faucet Aerator that turned out to be #3 on this list. It isn’t as conservation-minded of a choice as this one but we turn our water off between uses, and use so little sink water already, that we rationalized skipping just one shower on a day at home would more than offset the difference. We did that when we switched. 🙂

KEY FEATURES

• The most environmentally conscious option
• Has ‘The Mist Mode’ and the ‘Save Mode’ options on this model
• On ‘The Mist Mode’ it saves up to 98% of water when used
• On the ‘Save Mode’ it saves up to 85% of water when used

PROS/CONS COMMENTS

• “Best water saver. Full mist and elegant looking.”
• “They also take a good amount of time washing their hands”
• “Nice snug fit. No leaking. This is awesome.”
• “Hard to switch from Mist to Save mode.” – Community Pioneer Jae
• “Mist mode makes the areas around my sink wet.” – Community Pioneer Jae
• “Mist mode has extremely limited uses.” – Community Pioneer Jae
• “Save mode pressure is too high, makes a mess.” – Community Pioneer Jae

ADDITIONAL INFORMATION

Altered Nozzle Company Website | Purchasing on Amazon

RESOURCES

Here are any other resources we’ve found (or that have been shared with us) and we think may be helpful:

• Article: “Steel and the Circular Economy: A Guide to Sustainable Manufacturing and Construction”
• Suggest an addition to this section by clicking here

REVIEWS AND PURCHASING ON AMAZON

Here are Amazon purchasing and review links for the products from the Consumer Sites and Faucet Accessories sections.

SUMMARY

One Community has invested over 10 hours of research just on water-saving faucets and related water-saving faucet accessories. Our goal is to open source share our group’s experience with all the ones we use as part of the development of the Earthbag Village and Duplicable City Center. We will evolve this page with those details and use what we learn to help us with our purchasing decisions as we build each of the other 6 sustainable village models.

FREQUENTLY ANSWERED QUESTIONS

Q: What is GPM and LPM?

GPM is gallons per minute and LPM is liters per minute.

Q: What does OEM mean?

OEM stands for Original Equipment Manufacturer.

Q: What is the difference between a timeout setting and a follow-up setting?

The timeout setting is for the maximum amount of time the faucet will dispense water with a target present. If you wanted a faucet with a timeout setting of ‘0’, it would not dispense any water. The follow-up time is how often the sensor will check to see if a target is present so that it continues to provide water.

Q: Where will you be posting your continued research?

We’ll create individual pages with testimonials and YouTube links with more details. We will then link to all of those pages from this page.

Q: Was One Community paid or incentivized in any way to choose the products we chose?

No, the research to identify and make the selections we made was done by a volunteer researcher without incentives or input from One Community or any company.