If your hatch rests directly on the moldings like ours did add 2 1 2 in wide stops around the.
How to seal air handler plenum in 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.
Your plenum will typically be located in an unheated area of the house such as the attic or garage.
Humid air and air flow.
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.
Leaks in hvac air handlers can usually be seen felt and heard.
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.
Common places to find them are at ill fitting cover panels or those with missing screws.
And plenum and return air connectors.
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.
The entrance of the attached air filter insertion point base.