Attic Duct Return Installation

As difficult to achieve as getting hvac companies to actually train their workers how to install ducts.

Attic duct return installation.

Cut holes in the top of the return air duct to match the holes in the panning. I ve read a bunch of articles here and on bsc s site concerning ducts in the attic. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. 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 duct insulation should include a vapor barrier cover. I have a couple questions. Here the two liners weren t even touching. Give your ducts the proper support.

The tape on the duct liner wasn t sealed. You want to run it so it covers up all the holes you cut in the panning. 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.

Hard ducts without proper mooring will be unbalanced and unbalanced ductwork might be to blame for a number of hvac problems. Install the square return air duct perpendicular to the joists. This pulls the air across your body. I ve replaced the supply ducts and have insulated and encapsulated my crawlspace according to the best methods presented on this site.

Supply air from furnaces and air conditioners should be on outside walls. 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. Improperly supported flex. Use metal flex or fiber board ducts that are insulated to code.

Return ducts in my attic. If the supply ducts are in the floor then the return air should be located up high. At least with the other one they had two inches of overlap. The flex duct liner inside wasn t connected.

And this is just one of the reasons that the return ducts need to be installed directly across from the supply vents. So that duct was sucking in attic air and sending it to the house. 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 ducts are installed strategically in these locations to help battle this heat loss or heat gain.

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. My 1948 ranch house has supply ducts in the crawlspace return ducts in the attic. The photo here shows one in a return duct.