Unconditioned Attics
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Is Venting an Unconditioned Attic Necessary?
Air-sealing and insulation can go a long way toward addressing the issues with attics that are outside the conditioned space
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6 Ways to Improve Ducts in an Unconditioned Attic
If you can't get ducts out of an unconditioned attic, you can make the efficiency liability smaller
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Ducts in an Unconditioned Attic
The best place for ductwork is inside the thermal boundary of the house, not in an unconditioned, vented attic
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Attic Stairs for High-Performance Houses
An Austrian company is manufacturing a pull-down stair certified by the Passivhaus Institut