How To Seal Air Handler Plenum In Attic

Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. Hot humid air mixes with the cold internal air of the air handler by the cold metal of the unit causing condensation. If an air handler is in a garage attic crawlspace or closet it might experience less air flow and humid air.

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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.

How to seal air handler plenum in attic.

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. Leaks in hvac air handlers can usually be seen felt and heard. Humid air and air flow. This is a common occurrence in florida garages.

Your plenum will typically be located in an unheated area of the house such as the attic or garage. The entrance of the attached air filter insertion point base. If your hatch rests directly on the moldings like ours did add 2 1 2 in wide stops around the. Anyhow the return box and the other box that has the ducts coming out of it are made of sheet metal.

Common places to find them are at ill fitting cover panels or those with missing screws. 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. Where air conditioning pipes enter the housing grommets may be missing or leaky. And plenum and return air connectors.