A home with a forced air heating and cooling system uses duct work to move the air around the house. The supply duct work moves air from the furnace to each room to deliver heating and cooling. A second duct system, called the return ducts, pulls air from each room and delivers it back to the furnace to be conditioned. The space between floor joists can be used for the return duct system. Properly sealing the inside of the duct improves efficiency.
Things You'll Need
- Caulking gun
- Utility knife
- Acrylic caulking
- Acrylic adhesive
- Return air joist pan
- Staple gun
- Duct tape
Install caulking in caulking gun and cut the tip off the end with a utility knife. Apply a bead of caulking along the junction between the floor joists and floor sheathing on the inside of both joists.
Install acrylic adhesive in caulking gun and cut the tip off the end with a utility knife. Apply a bead of caulking in a continuous fashion along the bottom of the floor joists.
Hold the return air joist pan against the bottom of the joists and staple in place. Use a staple every few inches on either side. Install a second sheet of return air pan in the same method, aligning their ends. Repeat process until entire return is built.
Seal the joints with duct tape, evenly positioned between both sheets.
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