Attic Duct Return Installation

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.

Attic duct return installation.

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. The tape on the duct liner wasn t sealed. The ducts are installed strategically in these locations to help battle this heat loss or heat gain. The flex duct liner inside wasn t connected.

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. And this is just one of the reasons that the return ducts need to be installed directly across from the supply vents. I have a couple questions. Give your ducts the proper support.

I ve replaced the supply ducts and have insulated and encapsulated my crawlspace according to the best methods presented on this site. Use metal flex or fiber board ducts that are insulated to code. I ve read a bunch of articles here and on bsc s site concerning ducts in the attic. The photo here shows one in a return duct.

The duct insulation should include a vapor barrier cover. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. You want to run it so it covers up all the holes you cut in the panning. Improperly supported flex.

If testing of ducts returns was code this would be a step in the right direction. Cut holes in the top of the return air duct to match the holes in the panning. If the supply ducts are in the floor then the return air should be located up high. My 1948 ranch house has supply ducts in the crawlspace return ducts in the attic.

When installed in this fashion it will allow the system to suck the air throughout the entire room. So that duct was sucking in attic air and sending it to the house. This pulls the air across your body. Hard ducts without proper mooring will be unbalanced and unbalanced ductwork might be to blame for a number of hvac problems.

Supply air from furnaces and air conditioners should be on outside walls. This allows the air to get into the return air duct. Return ducts in my attic. At least with the other one they had two inches of overlap.

Here the two liners weren t even touching. Install the square return air duct perpendicular to the joists. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.