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Old 08-28-2012, 05:18 PM   #1
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Filter size


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"?

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Gary

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Old 08-28-2012, 05:33 PM   #2
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Filter size


A 4" strip of sheet metal.

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Old 08-28-2012, 05:37 PM   #3
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Filter size


I must be missing something, why not just buy the right sized filter?
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Old 08-28-2012, 05:44 PM   #4
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Filter size


Quote:
Originally Posted by garywinder View Post
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....
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