How To Seal Air Handler Plenum In Attic

This is a common occurrence in florida garages.

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. Hot humid air mixes with the cold internal air of the air handler by the cold metal of the unit causing condensation. If your hatch rests directly on the moldings like ours did add 2 1 2 in wide stops around the. Leaks in hvac air handlers can usually be seen felt and heard.

Humid air and air flow. 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.

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. Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. 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. Anyhow the return box and the other box that has the ducts coming out of it are made of sheet metal.