Filter size

garywinder · 08-28-2012, 06:18 PM

I just moved into a 1970 house where the previous owner installed a new furnace which has a filter size of 20x12x1...the problem is the existing return vent is 16x12x1 so where the two meet there is a 4" hole with no filter. Is there something I can put in between that reduces the new return to the old one? And maybe even install a 5" filter instead of the 1"?

Thanks

Gary

**beenthere** · 08-28-2012, 06:33 PM

A 4" strip of sheet metal.

joecaption · 08-28-2012, 06:37 PM

I must be missing something, why not just buy the right sized filter?

ben's plumbing · 08-28-2012, 06:44 PM

Quote:

Originally Posted by garywinder

I just moved into a 1970 house where the previous owner installed a new furnace which has a filter size of 20x12x1...the problem is the existing return vent is 16x12x1 so where the two meet there is a 4" hole with no filter. Is there something I can put in between that reduces the new return to the old one? And maybe even install a 5" filter instead of the 1"?

Thanks

Gary

have the system checked and sized for proper filter size before you do anything....need right air flow amount....