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Right: Use mastic to air seal the return air plenum and to seal around refrigerant lines coming from the slab in the floor of the return

Right: Use mastic to air seal the return air plenum and to seal around refrigerant lines coming from the slab in the floor of the return

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Right: Air seal all seams in the return air plenum before installing a new air handler

Right: Air seal all seams in the return air plenum before installing a new air handler

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A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts

A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts

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Fairburn Community

Case Study

Case study describing a building project in the mixed-humid climate zone.

Habitat for Humanity High R-Value Prototype

Case Study

Case study describing a building project in the cold and very-cold climate zones.