How To Install Return Air Duct In Attic

You ll also need to provide a return path from a basement air handler or main level return to the second floor.

How to install return air duct in attic. Go into the basement and locate the holes. Size the hole. In more cases than not a 3 ton ac with the ducts in the attic has a ton or so of load that s just from the location of the ducts in the attic and the associated duct gains leakage etc. As difficult to achieve as getting hvac companies to actually train their workers how to install ducts.

That s right your heating and air system is nothing more than a big circulation unit. 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. Put the crimped end in first then put the other end of the duct in. Run the new flexible air duct under the house from the floor return to the underside of the air handler and attach to the metal vent box or plenum image 1.

The remaining 2 tons of capacity is at least 1 5x oversized for the actual 1 load. The damper control indicator will show you whether the damper is open or closed. How to install a return air duct. In this tutorial i am happy to show you how to properly install flexible duct to a register can for all you heating air conditioning ventilation do it your.

Remove existing ductwork where needed. If testing of ducts returns was code this would be a step in the right direction. You ll need to find a corner such as in a closet to build a duct chase to get ducts from basement to attic. Work from the farthest hole back and install return air panning back.

If the air duct isn t long enough it is possible to add extra length. As long as there s an unobstructed path e g no door that can be closed the upstairs doesn t need a dedicated return. A return duct is the part of the system that carries the air back to the furnace or air handler where it will then be circulated back out through the supply vents. Install the damper into the duct by drilling a hole into the side of the duct and then screw the damper into place.

Locate where you want your return air ducts.