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Right – The HVAC unit installed in the insulated attic uses a heat pump to provide heating and cooling while also providing dehumidification and fresh air ventilation.

Right – The HVAC unit installed in the insulated attic uses a heat pump to provide heating and cooling while also providing dehumidification and fresh air ventilation.
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Right – There is no carpet installed in the bathroom

Right – There is no carpet installed in the bathroom
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Right – There is no carpet installed in the bathroom

Right – There is no carpet installed in the bathroom
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Right – This energy recovery ventilator provides fresh air and exhausts stale air through a heat exchanger that recovers heat from the outgoing air in winter and reduces heat from incoming air in the summer to provide ventilation without wasting energy.

Right – This energy recovery ventilator provides fresh air and exhausts stale air through a heat exchanger that recovers heat from the outgoing air in winter and reduces heat from incoming air in the summer to provide ventilation without wasting energy.
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Right – This home’s HVAC system consists of a ground source heat pump that provides heating and cooling with a rated efficiency of 5.0 COP.

Right – This home’s HVAC system consists of a ground source heat pump that provides heating and cooling with a rated efficiency of 5.0 COP.
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Right – This HVAC condensing unit is elevated on a raised-slab

Right – This HVAC condensing unit is elevated on a raised-slab
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Right – Workers lay radiant floor loops over the concrete reinforcement which is laid over a heavy vapor barrier installed over the sub-slab insulation before the slab is poured.

Right – Workers lay radiant floor loops over the concrete reinforcement which is laid over a heavy vapor barrier installed over the sub-slab insulation before the slab is poured.
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Right (decent): For a relatively high-capacity ccASHP sized per Approach 3 or 4 to meet nearly 100% of the heating load, this heat pump’s modulating zone has a decent overlap with the home’s heating load line, reducing short-cycling.

Right (decent): For a relatively high-capacity ccASHP sized per Approach 3 or 4 to meet nearly 100% of the heating load, this heat pump’s modulating zone has a decent overlap with the home’s heating load line, reducing short-cycling.
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Right-- IR photo shows how effectively spray foam insulated/air sealed attic kneewall and the floor cavities under kneewall

Right-- IR photo shows how effectively spray foam insulated/air sealed attic kneewall and the floor cavities under kneewall
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Right: A well-constructed air handler closet

Right: A well-constructed air handler closet
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Right: Sized per Approach 1, this heat pump will have minimal short-cycling; since sized using Approach 1, it will require backup heat when temp is below 30°F but could still contribute significant heating down to heating design temp (-6°F) and lower

Right: Sized per Approach 1, this heat pump will have minimal short-cycling; since sized using Approach 1, it will require backup heat when temp is below 30°F but could still contribute significant heating down to heating design temp (-6°F) and lower
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Right: Sized per Approach 3 or 4, this heat pump’s modulating zone has a large overlap with the home’s heating load line, resulting in minimal short-cycling; the unit may require a small amount of backup heat during the very coldest hours of winter.

Right: Sized per Approach 3 or 4, this heat pump’s modulating zone has a large overlap with the home’s heating load line, resulting in minimal short-cycling; the unit may require a small amount of backup heat during the very coldest hours of winter.
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Right: Sized per Approach 3, this heat pump’s modulating zone has a large overlap with the home’s heating load line; it will require backup heating but could still contribute significant heating for all hours of the heating season

Right: Sized per Approach 3, this heat pump’s modulating zone has a large overlap with the home’s heating load line; it will require backup heating but could still contribute significant heating for all hours of the heating season
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Rigid foam and caulk are used to seal each joist bay cavity

Rigid foam and caulk are used to seal each joist bay cavity
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Rigid foam insulation and a thin slab were installed over the dirt and gravel of this sealed crawlspace

Rigid foam insulation and a thin slab were installed over the dirt and gravel of this sealed crawlspace
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Roof supports for the awning that will cover the heat pump compressor are anchored through the siding into studs with long screws.

Roof supports for the awning that will cover the heat pump compressor are anchored through the siding into studs with long screws.
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Seal all joints and seams in the metal ductwork with mastic before installing insulation

Seal all joints and seams in the metal ductwork with mastic before installing insulation
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Seal Seams in Air Handler Cabinets

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Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic

Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic
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Sealed blocking

Sealed blocking
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Select flooring appropriate for wet areas

Select flooring appropriate for wet areas
Case Study:

Show Home Targets Energy Efficiency in Hot-Humid Climates

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Some builders create pan joists by attaching a solid sheet good to the bottom of a floor joist to create a return air pathway

Some builders create pan joists by attaching a solid sheet good to the bottom of a floor joist to create a return air pathway
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Split-system air source heat pump

Split-system air source heat pump