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The inside refrigerant line leading from the air conditioner or heat pump to the wall should be covered with pipe insulation and a vapor barrier to reduce condensation potential and improve system efficiency.

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Sealed and Insulated Flex Ducts

Guide

Guide describing how to air seal and insulate flex ducts.

Existing Whole-House Solutions Case Study: Retrofit of 1915 Home, Dayton, Washington

Case Study

Case study describing an energy efficient renovation in the cold climate.

New Whole-House Solutions Case Study: Tommy Williams Homes: Longleaf Village & Belmont, Gainesville, FL

Case Study

Case study describing a production builder that achieves HERS scores of 60, compared to 85 for other builders that build new homes to Florida code.

Building America Case Study Technology Solutions for Existing Homes: Concord Four Square Retrofit

Case Study

Case study describing a four-square Concord home retrofitted by Building Science Corporation in Massachusetts.

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

Case Study

Case study describing a DOE Zero Energy Ready Home 2014 Housing Innovation Award winner that scored HERS 45 without PV and 32 with PV and is the first home in the world to use a tri-generation system to supply electricity, heating, and cooling on site.