filters

[hrdhead]

Hi all,is it better to filter at the returns or at the air handler.Thanks.

[21degrees]

Ducts leak and return is negative pressure.

[dash]

If the return ducts are sealed,at the grilles ,so you can have much more surface area ,which will allow for better filters without as much pressure drop.

[21degrees]

If the return ducts are sealed,at the grilles ,so you can have much more surface area ,which will allow for better filters without as much pressure drop.

But never seen a system with air tight returns. I think it would be risky.

[coo tech]

filtering at th grill keeps your return duct clean.

[Catpower]

Filtering at the grille makes it easier to change the filters (in most cases)

[21degrees]

filtering at th grill keeps your return duct clean.

Your are filter the equipment and the supply air, just keeping R/A clean will not help if air is being introduce down stream of filtering.

[smokin68]

At the grills is the best IMO(where mine are personally), unless you go with a media filter at the unit. Like stated, static is affected, so needs to be checked.

[coo tech]

Your are filter the equipment and the supply air, just keeping R/A clean will not help if air is being introduce down stream of filtering.

"if air is being introduce down stream of filtering" you have other issues that should be addressed. Cheers.