Moving Duct Work In Attic

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Moving duct work in attic.

It was new when the ac was put in 7 years ago. Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water. Strap the flex duct to the attic framing at 4 foot intervals with duct straps and drywall screws. While the attic install isn t ideal it beats the problems that come with.

My circa 1999 townhouse has finished attic where flex duct runs are sandwiched between the roof and cathedral ceiling. Map out the current a c ductwork by going up into the attic or crawl space. Going over every inch of ductwork is a laborious process especially when a section of ductwork is in a location that s difficult to reach. I chose unfaced batt type so that it would stay in place.

Strap ducts out of insulation with 3 ductstraps per specifications. Always insulate the duct to prevent condensation problems as the warm air will be potentially running through cold ductwork. However unless you have new construction is highly doubtful that you can find an alternative. You might think you have every single hole sealed but even so new leaks can occur without you even knowing about it.

In addition to making the unit hard to get to for service high attic heat can trigger the high. The humorous part is wondering how many nails punctured the duct work which runs between the roof and the cathedral ceiling. Foam tubing or fiberglass will work but it s also possible to buy pre insulated 4 duct. Insulate and air seal the floor with open cell foam put ductwork and mechanicals in the attic install a radiant barrier and mastic seal the ducts.

I called out the original hvac company and they took a look and said they saw no water. Instead i covered my attic ducts with insulation. Cut the straps to length with sheet metal cutters. According to nrel researchers david roberts and jon winkler moving the ducts from a vented attic to a new location inside the conditioned space will reduce electricity used for cooling by 15 to 20 and will reduce the size of the needed air conditioning equipment by 0 5 to 1 ton.

The attic ductwork is flex duct work. Locate the screw sticking up through the ceiling and mark this with tape for reference. Smooth rigid ducts with tape or mastic around all joints will prevent air leakage. Put it in an attic full of blown insulation and you re forcing it to work harder to vent its heat.

I believe that moving ducts out of the hostile temperature environment of the attic is obvious. Also attic ducts often leak. Hoa did a re roof and i can see the new nail penetrations in the mechanical closet.