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. The tape on the duct liner wasn t sealed. If testing of ducts returns was code this would be a step in the right direction. So that duct was sucking in attic air and sending it to the house. Supply air from furnaces and air conditioners should be on outside walls.

I ve read a bunch of articles here and on bsc s site concerning ducts in the attic. Give your ducts the proper support. The flex duct liner inside wasn t connected. I ve replaced the supply ducts and have insulated and encapsulated my crawlspace according to the best methods presented on this site.

I have a couple questions. Improperly supported flex. Return ducts in my attic. And this is just one of the reasons that the return ducts need to be installed directly across from the supply vents.

When installed in this fashion it will allow the system to suck the air throughout the entire room. 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. My 1948 ranch house has supply ducts in the crawlspace return ducts in the attic. You want to run it so it covers up all the holes you cut in the panning.

Install the square return air duct perpendicular to the joists. If the supply ducts are in the floor then the return air should be located up high. Here the two liners weren t even touching. At least with the other one they had two inches of overlap.

The ducts are installed strategically in these locations to help battle this heat loss or heat gain. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Hard ducts without proper mooring will be unbalanced and unbalanced ductwork might be to blame for a number of hvac problems. The duct insulation should include a vapor barrier cover.

This allows the air to get into the return air duct. This pulls the air across your body. 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 photo here shows one in a return duct.

Cut holes in the top of the return air duct to match the holes in the panning. 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. As difficult to achieve as getting hvac companies to actually train their workers how to install ducts.