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This heated garage plenum space is insulated along its top, bottom and sides, and the insulation at the top of the plenum meets IECC requirements. The insulation along the top and sides is fully aligned with an air barrier.

This heated garage plenum space is insulated along its top, bottom and sides, and the insulation at the top of the plenum meets IECC requirements. The insulation along the top and sides is fully aligned with an air barrier.
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This home’s ultra-efficient ground-source heat pump provides hot water for space heating as well as domestic hot water for the 50-gallon storage tank.

This home’s ultra-efficient ground-source heat pump provides hot water for space heating as well as domestic hot water for the 50-gallon storage tank.
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This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home

This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home
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This IR camera image of a multifamily building shows extensive thermal bridging at the floor slabs. (Windows appear dark because they are reflecting the cool night sky.)

This IR camera image of a multifamily building shows extensive thermal bridging at the floor slabs. (Windows appear dark because they are reflecting the cool night sky.)
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This is a take-off collar for connecting a round metal duct to a flat sheet metal trunk duct.

This is a take-off collar for connecting a round metal duct to a flat sheet metal trunk duct.
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This is an example of an insulation pattern for rigid metal ducts that has been measured and cut in a comfortable location before being carried into the attic.

This is an example of an insulation pattern for rigid metal ducts that has been measured and cut in a comfortable location before being carried into the attic.
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This kneewall has no top plate and the resulting gap provides a wide-open pathway for air and vapor to travel between the living space and the attic

This kneewall has no top plate and the resulting gap provides a wide-open pathway for air and vapor to travel between the living space and the attic
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This louvered vent cap works well for clothes dryer vent ducts because it has no screening that could trap dryer lint

This louvered vent cap works well for clothes dryer vent ducts because it has no screening that could trap dryer lint
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This multistory multifamily building was constructed of insulated concrete forms (ICFs); synthetic stucco can be applied directly over the ICF

This multistory multifamily building was constructed of insulated concrete forms (ICFs); synthetic stucco can be applied directly over the ICF
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This plan view of a multifamily building shows how a leaky central exhaust system can create negative pressure zones, pulling unconditioned outside air or humid inside air into the service shaft and wall cavities

This plan view of a multifamily building shows how a leaky central exhaust system can create negative pressure zones, pulling unconditioned outside air or humid inside air into the service shaft and wall cavities
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This return inlet has been covered and sealed in preparation for a duct leakage test at rough-in.

This return inlet has been covered and sealed in preparation for a duct leakage test at rough-in.
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This rigid duct connection was repaired using self-piercing/self-drilling sheet metal screws to mechanically secure the connection; then it was air sealed using UL-181 fiber-reinforced duct sealant mastic paste

This rigid duct connection was repaired using self-piercing/self-drilling sheet metal screws to mechanically secure the connection; then it was air sealed using UL-181 fiber-reinforced duct sealant mastic paste
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This rigid metal duct connection was taped with regular duct tape and became disconnected when the tape adhesive failed

This rigid metal duct connection was taped with regular duct tape and became disconnected when the tape adhesive failed
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This saddle take-off collar is used to connect a round sheet metal duct to another round sheet metal duct.

This saddle take-off collar is used to connect a round sheet metal duct to another round sheet metal duct.
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This semi-rigid clothes dryer exhaust duct has excessive length; the bends in the duct will severely restrict air flow and could lead to clogging of the duct by dryer lint

This semi-rigid clothes dryer exhaust duct has excessive length; the bends in the duct will severely restrict air flow and could lead to clogging of the duct by dryer lint
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This single-zone mini-split ductless heat pump has only one indoor wall-mounted unit and one outdoor unit.

This single-zone mini-split ductless heat pump has only one indoor wall-mounted unit and one outdoor unit.
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This steel angle used for installing brick veneer on a multistory building is attached to the building with steel “clip” bracket supports that offset the angle from the framing to reduce thermal bridging and provide room for exterior insulation

This steel angle used for installing brick veneer on a multistory building is attached to the building with steel “clip” bracket supports that offset the angle from the building framing to reduce thermal bridging and provide room for exterior insulation
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This supply outlet is covered and sealed prior to a duct leakage test at final.

This supply outlet is covered and sealed prior to a duct leakage test at final.
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This take-off collar for a round metal duct is secured to the HVAC plenum using #7 x ½-inch self-piercing/self-drilling sheet metal screws.

This take-off collar for a round metal duct is secured to the HVAC plenum using #7 x ½-inch self-piercing/self-drilling sheet metal screws.
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This technique for installing electrical wiring avoids the need to cut into the SIP panel

This technique for installing electrical wiring avoids the need to cut into the SIP panel
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This traditional centrally ducted heat pump heats and cools the entire home through a network of ducts.

This traditional centrally ducted heat pump heats and cools the entire home through a network of ducts.
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This typical central ductwork system for a multifamily building includes all ductwork sections, such as vertical risers, main trunks, horizontal run outs, branches, and take-offs

This typical central ductwork system for a multifamily building includes all ductwork sections, such as vertical risers, main trunks, horizontal run outs, branches, and take-offs
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This typical dropped ceiling hallway chase shows a complicated air sealing scheme where chase ceiling drywall meets sidewall top plates

This typical dropped ceiling hallway chase shows a complicated air sealing scheme where chase ceiling drywall meets sidewall top plates
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This utility room houses a high-efficiency gas boiler to provide hot water for the radiant floor heating system and faucets. It also has a central air source heat pump and an energy recovery ventilator.

This utility room houses a high-efficiency gas boiler to provide hot water for the radiant floor heating system and faucets. It also has a central air source heat pump and an energy recovery ventilator.