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Central ductwork systems for multifamily buildings include horizontal run outs with branches and take-offs connecting to air supply boots

Central ductwork systems for multifamily buildings include horizontal run outs with branches and take-offs connecting to air supply boots
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Central heat pump water heaters like this fully packaged system provide efficient, reliable domestic hot water for multifamily buildings; storage tanks are within the enclosure, and the heat pump is seen just outside.

Central heat pump water heaters like this fully packaged system provide efficient, reliable domestic hot water for multifamily buildings; storage tanks are within the enclosure, and the heat pump is seen just outside.
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Chase framing is completed and ready for drywall

Chase framing is completed and ready for drywall
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Check the air pressure of the water heater's expansion tank using an air pressure gauge (shown) and adjust it using an air pump to match the home's cold water pressure.

Check the air pressure of the water heater's expansion tank using an air pressure gauge (shown) and adjust it using an air pump to match the home's cold water pressure.
Case Study:

Chesapeake Habitat for Humanity: Affordable Housing Case Study

Video:

Choosing ENERGY STAR Water Heaters with Build Show

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Clean the air filter of your tankless water heater with soapy water and a soft bristled brush.

Clean the air filter of your tankless water heater with soapy water and a soft bristled brush.
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Clean the dust off the duct board where the tape will be applied. Apply a robust amount of Foil-Scrim-Kraft (FSK) duct tape.

Clean the dust off the duct board where the tape will be applied. Apply a robust amount of Foil-Scrim-Kraft (FSK) duct tape.
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Climate Zones Where a Heat Pump Water Heater can be Installed in Unconditioned Space

Climate Zones Where a Heat Pump Water Heater can be Installed in Unconditioned Space
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Closed-cell spray foam covers the heat recovery ventilator ducts and also seals all top plates and seams in the ceiling drywall of the vented attic.

Closed-cell spray foam covers the heat recovery ventilator ducts and also seals all top plates and seams in the ceiling drywall of the vented attic.
Case Study:

CO2 Heat Pump Water Heater Multifamily Retrofit: Elizabeth James House Seattle WA

Case Study:

Coastal Habitats

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Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off

Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off
Case Study:

Colleyville Eco House Prototype

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Combined space and water heating system with tankless gas water heater

Combined space and water heating system with tankless gas water heater
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Combined water and space heater using combi boiler

Combined water and space heater using combi boiler
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Combined water and space heater using tankless water heater

Combined water and space heater using tankless water heater
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Combustion safety testing using a smoke pen

Combustion safety testing using a smoke pen
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Common exhaust duct not shared by fans in separate dwellings

Common exhaust duct not shared by fans in separate dwellings
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Compact duct design layout

Compact duct design layout
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Compact duct layout example

Compact duct layout example
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Compare gas tankless water heater efficiencies on the Energy Guide labels or look for the ENERGY STAR label

Compare gas tankless water heater efficiencies on the Energy Guide labels or look for the ENERGY STAR label
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Components of a heat pump water heater

Components of a heat pump water heater
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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