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Sterling Brook Homes built this custom home in the hot-humid climate in Double Oak, TX, and certified it to DOE Zero Energy Ready Home specifications in 2014.

Sterling Brook Homes built this custom home in the hot-humid climate in Double Oak, TX, and certified it to DOE Zero Energy Ready Home specifications in 2014.
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Streetscape Development built this custom home in the cold climate in Libertyville, IL, and certified it to DOE Zero Energy Ready Home specifications in 2013.

Streetscape Development built this custom home in the cold climate in Libertyville, IL, and certified it to DOE Zero Energy Ready Home specifications in 2013.
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Sunroc Builders built this affordable home in the hot-humid climate in Lakeland, FL, and certified it to DOE Zero Energy Ready Home specifications in 2016.

Sunroc Builders built this affordable home in the hot-humid climate in Lakeland, FL, and certified it to DOE Zero Energy Ready Home specifications in 2016.
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Sustainable 9 Design + Build built this custom for buyer home in the cold climate in Edina, MN, and certified it to DOE Zero Energy Ready Home specifications in 2019.

Sustainable 9 Design + Build built this custom for buyer home in the cold climate in Edina, MN, and certified it to DOE Zero Energy Ready Home specifications in 2019.
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Sustainable Nine built this custom for buyer home in the cold climate in Cooperstown, NY, and certified it to DOE Zero Energy Ready Home specifications in 2020.

Sustainable Nine built this custom for buyer home in the cold climate in Cooperstown, NY, and certified it to DOE Zero Energy Ready Home specifications in 2020.
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Sustainable Nine built this custom for buyer home in the marine climate in Everson, WA, and certified it to DOE Zero Energy Ready Home specifications in 2020.

Sustainable Nine built this custom for buyer home in the marine climate in Everson, WA, and certified it to DOE Zero Energy Ready Home specifications in 2020.
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Targa Homes built this attached home in the marine climate in Seattle, WA, and certified it to DOE Zero Energy Ready Home specifications in 2021.

Targa Homes built this attached home in the marine climate in Seattle, WA, and certified it to DOE Zero Energy Ready Home specifications in 2021.
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TC Legend Homes built this custom for buyer home in the marine climate in Bellevue, WA, and certified it to DOE Zero Energy Ready Home specifications in 2021.

TC Legend Homes built this custom for buyer home in the marine climate in Bellevue, WA, and certified it to DOE Zero Energy Ready Home specifications in 2021.
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The air handler of the air-to-water heat pump is equipped with a very high efficiency air filter and a damper-controlled fresh air intake.

The air handler of the air-to-water heat pump is equipped with a very high efficiency air filter and a damper-controlled fresh air intake.
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The airflow direction is labeled on the edge of the filter to ensure it is properly oriented when installed.

The airflow direction is labeled on the edge of the filter to ensure it is properly oriented when installed.
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The blower wheel (fan) on this ductless wall-mounted indoor unit has accumulated dust and mold - a common issue for this design.

The blower wheel (fan) on this ductless wall-mounted indoor unit has accumulated dust and mold - a common issue for this design.
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The edge of this 1-inch HVAC filter indicates it's dimensions, allowing proper matching of filter to air handler

The edge of this 1-inch HVAC filter indicates it's dimensions, allowing proper matching of filter to air handler
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The filter access panel on this vertical upflow air handler is located between the return ductwork below and the coils above.

The filter access panel on this vertical upflow air handler is located between the return ductwork below and the coils above.
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The filter is installed in the crawlspace and is not easily accessible

The filter is installed in the crawlspace and is not easily accessible
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The furnace filter slot cover should fit tightly to minimize air leakage but it should not be taped or caulked to enable frequent filter replacements.

The furnace filter slot cover should fit tightly to minimize air leakage but it should not be taped or caulked to enable frequent filter replacements.
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The installed filter is at least a MERV 6 filter

The installed filter is at least a MERV 6 filter
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The installed filter is not a MERV 6 filter

The installed filter is not a MERV 6 filter
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The MERV rating, particle capture efficiencies, and pressure drops are printed on the side of this 1-inch pleated filter

The MERV rating, particle capture efficiencies, and pressure drops are printed on the side of this 1-inch pleated filter
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There is a filter installed to filter outdoor air

There is a filter installed to filter outdoor air
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There is no filter installed in the HVAC system

There is no filter installed in the HVAC system
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There is no filter installed to filter the outdoor air

There is no filter installed to filter the outdoor air
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This 3,600-ft2 home built by Weiss Building & Development, in River Forest, Illinois, is a certified U.S. Department of Energy (DOE) Zero Energy Ready Home and meets Passive House Institute U.S. requirements.

This 3,600-ft2 home built by Weiss Building & Development, in River Forest, Illinois, is a certified U.S. Department of Energy (DOE) Zero Energy Ready Home and meets Passive House Institute U.S. requirements.
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This ductless wall-hung indoor unit has supplemental air filters (outlined in red), which only filter a portion of the airflow; most of the air bypasses the supplementary filters and only passes through the standard mesh filters.

This ductless wall-hung indoor unit has supplemental air filters (outlined in red), which only filter a portion of the airflow; most of the air bypasses the supplementary filters and only passes through the standard mesh filters.
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This highly efficient 1,290-ft2 home by Habitat for Humanity of South Sarasota County, Florida, is built to the requirements of the U.S. Department of Energy (DOE) Zero Energy Ready Home program and has low utility bills of about $72 per month.

This highly efficient 1,290-ft2 home by Habitat for Humanity of South Sarasota County, Florida, is built to the requirements of the U.S. Department of Energy (DOE) Zero Energy Ready Home program and has low utility bills of about $72 per month.