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A single ductless heat pump heats and cools the country’s first DOE Zero Energy Ready certified manufactured home.

A single ductless heat pump heats and cools the country’s first DOE Zero Energy Ready certified manufactured home.
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A small, single-zone cooling system such as this ductless mini-split heat pump can be a very effective way to provide emergency cooling with a low power draw on a backup power system.

A small, single-zone cooling system such as this ductless mini-split heat pump can be a very effective way to provide emergency cooling with a low power draw on a backup power system.
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A technician conducts a duct blaster test

A technician conducts a duct blaster test
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A vapor barrier was installed on the floor of this crawlspace and extended up the walls then the foundation walls were covered with rigid foam.

A vapor barrier was installed on the floor of this crawlspace and extended up the walls then the foundation walls were covered with rigid foam.
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A wall-mounted ductless air handler for a ductless heat pump system

A wall-mounted ductless air handler for a ductless heat pump system
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A water-source heat pump with a closed-loop in-pond piping system

A water-source heat pump with a closed-loop in-pond piping system
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After securing the inner coil, cover the draw band and the seam with a generous amount of mastic

After securing the inner coil, cover the draw band and the seam with a generous amount of mastic
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Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities

Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities
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An energy recovery ventilator draws in fresh outside air that is filtered and circulated by the central air handler, while stale air from central returns is routed through the ERV to exchange heat before being exhausted outside.

An energy recovery ventilator draws in fresh outside air that is filtered and circulated by the central air handler, while stale air from central returns is routed through the ERV to exchange heat before being exhausted outside.
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An oil-fired boiler with direct combustion air and exhaust venting

An oil-fired boiler with direct combustion air and exhaust venting
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Anemometers, including the vane style (lower) and hotwire style (upper) are used to measure air velocity to calculate airflow

Anemometers, including the vane style (lower) and hotwire style (upper) are used to measure air velocity to calculate airflow
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Any holes through the vapor barrier installed over the basement floor slab are thoroughly sealed as part of the foundation water barrier system.

Any holes through the vapor barrier installed over the basement floor slab are thoroughly sealed as part of the foundation water barrier system.
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Assembled section of fiber board duct

Assembled section of fiber board duct
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Average wet-bulb temperatures across the United States

Average wet-bulb temperatures across the United States
Video:

Backdraft Dampers

Case Study:

Baxter Community - High Performance Green Building

Baxter Community - High Performance Green Building
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Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC

Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC
Case Study:

Best Practices Case Study: Devoted Builders, LLC, Mediterrtanean Villas, Pasco,WA

Best Practices Case Study: Devoted Builders, LLC, Mediterrtanean Villas, Pasco,WA
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Brick wall assembly for a hot-humid climate with no Class I vapor retarder and with an air gap (drained cavity) to dissipate vapor driven into the wall by the sun.

Brick wall assembly for a hot-humid climate with no Class I vapor retarder and with an air gap (drained cavity) to dissipate vapor driven into the wall by the sun.
Case Study:

Builders Challenge High Performance Builder Spotlight: Ferrier Custom Homes, Dallas, Texas

Case Study:

Builders Challenge High Performance Builder Spotlight: Palm Harbor Homes - Bimini II, Plant City, FL

Case Study:

Builders Challenge High Performance Builder Spotlight: Rural Development Inc., Turner Falls, Massachusetts

Case Study:

Builders Challenge High Performance Builder Spotlight: Tim O'Brien Homes, Waukesha, Wisconsin

Case Study:

Builders Challenge High Performance Builder Spotlight: Tommy Williams Homes