How To Seal Air Handler Plenum In Attic

Your plenum will typically be located in an unheated area of the house such as the attic or garage.

How to seal air handler plenum in attic.

And plenum and return air connectors. If an air handler is in a garage attic crawlspace or closet it might experience less air flow and humid air. Where air conditioning pipes enter the housing grommets may be missing or leaky. Anyhow the return box and the other box that has the ducts coming out of it are made of sheet metal.

This is a common occurrence in florida garages. When you re done sealing your attic bypasses push the insulation back into place with an old broom handle or stick as you back out of the attic. Because the plenum is where the greatest air pressure differential is found it is therefore the 1 place to seal to save energy and cash. Hot humid air mixes with the cold internal air of the air handler by the cold metal of the unit causing condensation.

Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. Common places to find them are at ill fitting cover panels or those with missing screws. The entrance of the attached air filter insertion point base. My mother has had me going up into her attic to seal the leaky ducts and parts of the plenum air handler that join up to the furnace and coil units.