Hello! I was wondering if anyone knows if I can put a filter in the return even if there is no holder? I have two units (upstairs/downstairs). They both have filters by the blowers but I've noticed the returns (2 upstairs/1 downstairs) are caked. Do I need to buy a holder or can I just put one in and rest it? Is it okay to do that?
Filter on returns
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double filtering can really reduce airflow.
(it's not a good idea to get rid of filter at furnace and just filter at grills because most returns leak.)
if you must, use fiberglass only at the return grills to pre-filter the air.
you can buy fiberglass hammock media and cut it to size.
(it's not a good idea to get rid of filter at furnace and just filter at grills because most returns leak.)
if you must, use fiberglass only at the return grills to pre-filter the air.
you can buy fiberglass hammock media and cut it to size.
Why not just change out your return grille to > one that holds a filter? These come in many sizes. Two latches and it lifts right up.
As suggested, just use a light see through fiberglass filter and change often. I have used these and experienced very little air reduction, and it allowed me to leave the pleated filter in the unit.
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As suggested, just use a light see through fiberglass filter and change often. I have used these and experienced very little air reduction, and it allowed me to leave the pleated filter in the unit.
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