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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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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
Video:

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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Select dimmers that are fully compatible with installed lighting

Select dimmers that are fully compatible with installed lighting
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
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Struever Bros. Eccles & Rouse: Mixed, Humid Climate Region 40+% Energy Savings

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Support at Intervals for Flex Ducts (1)

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Technology Solutions Case Study: Advanced Controls Improve Performance of Combination Space- and Water-Heating Systems

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Technology Solutions Case Study: Air-To-Water Heat Pumps with Radiant Delivery in Low Load Homes, Tucson, Arizona and Chico, California

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Technology Solutions Case Study: Combustion Safety for Appliances Using Indoor Air

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Technology Solutions Case Study: Field Performance of Inverter-Driven Heat Pumps in Cold Climates

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Technology Solutions Case Study: High-Performance Ducts in Hot-Dry Climates

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Technology Solutions Case Study: Improving the Field Performance of Natural Gas Furnaces

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Technology Solutions Case Study: Long-Term Monitoring of Mini-Split Ductless Heat Pumps in the Northeast, Devens and Easthampton, Massachusetts

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Technology Solutions Case Study: Low-Load Space-Conditioning Needs Assessment

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Technology Solutions Case Study: Optimizing Hydronic System Performance in Residential Applications, Ithaca, New York

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Technology Solutions Case Study: Performance of a Heat Pump Water Heater in the Hot-Humid Climate, Windermere, Florida

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Technology Solutions Case Study: Replacement of Variable-Speed Motors for Furnaces

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Technology Solutions Case Study: Replacing Resistance Heating with Mini-Split Heat Pumps