Attic Duct Return Installation

So that duct was sucking in attic air and sending it to the house.

Attic duct return installation.

The photo here shows one in a return duct. This is an especially relevant tip for flex ducts more on that in a minute but you need to make sure any ducts in your attic have proper support. It comes down to three options the first of which is to convert his attic into a conditioned space by installing 4 1 2 inches of polyiso insulation above the roof deck and then adding a new standing seam metal roof. The duct insulation should include a vapor barrier cover.

This pulls the air across your body. Use metal flex or fiber board ducts that are insulated to code. When installed in this fashion it will allow the system to suck the air throughout the entire room. If testing of ducts returns was code this would be a step in the right direction.

I have a couple questions. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Improperly supported flex. He d add open cell foam below the roof deck to give the assembly the required r value but the bids range from 40 000 to 60 000.

And this is just one of the reasons that the return ducts need to be installed directly across from the supply vents. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. If the supply ducts are in the floor then the return air should be located up high. Return ducts in my attic.

Hard ducts without proper mooring will be unbalanced and unbalanced ductwork might be to blame for a number of hvac problems. I ve replaced the supply ducts and have insulated and encapsulated my crawlspace according to the best methods presented on this site. The ducts are installed strategically in these locations to help battle this heat loss or heat gain. I ve read a bunch of articles here and on bsc s site concerning ducts in the attic.

The tape on the duct liner wasn t sealed. Here the two liners weren t even touching. The flex duct liner inside wasn t connected. Next areas to address are oversized supply box pentrations supply boxes that lift off the attic floor when supply grill is installed and return air leakage.

At least with the other one they had two inches of overlap. Install the square return air duct perpendicular to the joists. Give your ducts the proper support. This allows the air to get into the return air duct.

When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. You want to run it so it covers up all the holes you cut in the panning. Supply air from furnaces and air conditioners should be on outside walls.