I'd like to replace the ugly metal grill covering my hvac filter opening with a louvered door that has 1-1/2" open louvers.
The metal grill is 22" w X 27" h.
Would the open louvers in that size door allow enough air flow through the filter?
"IF" the ugly grill is only adiquate
"AND"the louvered door is also 22"x27",the door will restrict air flow.
ACCA Manual D calls for 300-fpm velocity through a 1" cheap fiber glass filter.
Hart&Cooley: Even a 20x25 grille yields 2.4-sq.ft. (Ak) area to flow only 721-CFM @300-fpm vel through it.
That is the low end of a 2-Ton A/C or high end of a 1.5-Ton A/C or heat pump.
udarrell . . . sorry, I don't understand. Can I use a louvered door there or not?