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Attic temperature in summer commonly runs 130 to 150 degrees on a hot afternoon. That's why this joke lands, and why the ducts carrying cool air through your attic need to be sealed and insulated.
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It's dim and cramped. Foil-wrapped flex duct snakes across the foreground of an attic, and back among the rafters crouches a figure in black clothing with a face covering.
A voice whispers that it's right behind you. The joke is that enough hours in attic heat will have you hearing things.
That foil jacket on the flex duct is its insulation wrap. Cold air from your AC travels inside it, surrounded by attic air far hotter than outdoors. If the jacket is torn or a joint has slipped apart, the duct gains heat and leaks cooled air before it reaches a room.
It does if your ducts or air handler sit up there. Cooled air picks up heat through every weak spot in the duct insulation, and any leak pulls in scorching attic air. Sealing joints, fixing crushed runs and adding insulation help the AC deliver what it makes to the rooms below.
Thinking about the trades? See careers at SwiftPro, or book a visit at (703) 997-9757.
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SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
Virginia Class A contractor license #2705192276