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Image:

Concept behind an evaporative cooler – warm air is cooled as the air passes through a wet medium and gives up some of its heat to evaporate the water

Concept behind an evaporative cooler – warm air is cooled as the air passes through a wet medium and gives up some of its heat to evaporate the water
Case Study:

Concord Cape Prototype

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Condensate from this heat pump water heater is routed to a nearby floor drain, shared with the condensate lines from a condensing gas furnace and an air conditioning coil

Condensate from this heat pump water heater is routed to a nearby floor drain, shared with the condensate lines from a condensing gas furnace and an air conditioning coil
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Condensing boilers have primary and secondary heat exchangers

Condensing boilers have primary and secondary heat exchangers
Video:

Construction of a Closed Crawlspace

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Cool air flow is produced when the cooling cycle is energized (set thermostat to “cool”)

Cool air flow is produced when the cooling cycle is energized (set thermostat to “cool”)
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Cooling air temperatures that can be achieved by a direct evaporative cooler at various outdoor conditions

Cooling air temperatures that can be achieved by a direct evaporative cooler at various outdoor conditions
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Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections

Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
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Desuperheater for domestic hot water

Desuperheater for domestic hot water
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Direct vent appliance installed

Direct vent appliance installed
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Direct-heat risers are bare pipes that heat the space they're in without connected radiators

Direct-heat risers are bare pipes that heat the space they're in without connected radiators
Case Study:

DOE ZERH HIA 2013 Case Study: Preferred Builders, Old Greenwich, Connecticut

Case Study:

DOE ZERH HIA 2014 Case Study: Imery Group Proud Green Home, Serenbe, GA

Case Study:

DOE ZERH HIA 2014 Case Study: M Street Homes, Smartlux on Greenpark Houston, TX

Case Study:

DOE ZERH HIA 2014 Case Study: Southeast Volusia Habitat for Humanity, Edgewater, FL

Case Study:

DOE ZERH HIA 2017 Case Study: United Way of Long Island, United Veterans Beacon House, Huntington Station, NY

Video:

Duct Leakage to Outdoors (2)

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Ductless Heat Pump Outside Compressor

Ductless Heat Pump Outside Compressor
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Ductless heat pump’s digitally controlled inverter compressor

Ductless heat pump’s digitally controlled inverter compressor
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Ductless indoor units like this one are controlled individually by handheld remote controllers.

Ductless indoor units like this one are controlled individually by handheld remote controllers.
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Ducts should not be located in exterior wall cavities

Ducts should not be located in exterior wall cavities
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Ductwork in an unvented attic

Ductwork in an unvented attic
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ECM Motor and Control

ECM Motor and Control
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ECM Motor Retrofit

ECM Motor Retrofit