Ducts In Attic Insulation

Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket.

Ducts in attic insulation.

Summer hasn t even arrived he notes in a post at gba s q a forum and when the temperature outside climbs to more than 95 f the temperature in the attic tops 120 f. Disconnected or leaking ducts. According to rightsuite the software we use the supply ducts have about 560 square feet of surface area and the return ducts 101 square feet. Covering ductwork with insulation.

Ductwork is the system of ducts and pipes that circulate heated or cooled air throughout your house. Or excess flex duct. When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm. Use a paintbrush to apply duct mastic to the joints where an elbow.

Looking at the cooling side only the additional load would be. If you re building a new house place ducts in the conditioned space to avoid the energy losses associated with most duct systems. They are the sheet metal or fiberglass conduits you find in your basement and attic. If your attic has enough insulation and proper air sealing and your home still feels drafty and cold in the.

Check the speed of the blower motor on the furnace. Today s flexible ductwork is covered with a shiny metallic cover this is its vapor barrier. Hvac ductwork is typically visible in your attic especially flexible ductwork. The shiny vapor barrier will protect the ductwork from sweating as long as it s exposed to the surrounding air.

Is it ok to do it. All the ducts are in the attic. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8 for attic ducts and 6 for ducts located anywhere else.

In existing homes with vented attics and hvac ducts that are installed on the attic floor bury ducts in blown attic insulation when adding or increasing attic insulation. R 8 duct insulation 5 227 btu hour. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. If the ducts in your home are in unconditioned space seal and insulate them.

If necessary switch the wires to reduce the blower to its lowest. What is the crawl space a crawl space is usually found under your house.