What is an attic bypass?
Bypasses are hidden air passageways that lead from the heated space into the attic. Because warm air rises, it continuously moves up the bypasses and escapes into the attic. Common attic bypasses are located around chimneys, ceiling light fixtures, heating ducts, kitchen and bath exhaust fans, plumbing, electrical wires, dropped ceilings and soffits. Please see Bypass Sealing.