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Old 03-30-2020, 02:56 PM   #1
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Return size


Hi. I recently bought a house built in the late 60s. The return filter size is 15 x 30 5/8 x 1. Is there a way to retrofit the opening to take a more currently available filter size? I have found this filter size online, but they are mostly junk filters, or the better ones are much more expensive than normal. Thanks
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Old 03-30-2020, 03:32 PM   #2
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Re: Return size


Yes, but most return air filter slots are field produced and installed.
Something could be made to work.
What do you consider a “better filter”?
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Old 03-30-2020, 04:05 PM   #3
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Re: Return size


For example, I've found Merv 8 filters 12-pack for over $100, while other sizes on Amazon same count and quality are $60 or less. And the only way to get that quality and somewhat decent price is to buy a 12-pack or more. The AC is dated 2006, so it could go anytime (in AZ on the roof), so maybe I will get it changed then.
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Old 03-30-2020, 05:28 PM   #4
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Re: Return size


What are you considering junk filters? Mine are considered junk and our central heat/air system is 37 years old with a blower wheel that's never been cleaned and doesn't need cleaning.
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Old 03-30-2020, 08:45 PM   #5
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Re: Return size


Filters should be changed twice a year at a minimum preferably before each season summer/winter. Depends on how much you use the system and pets

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Old 04-02-2020, 07:36 PM   #6
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Re: Return size


Quote:
Originally Posted by Matt1019 View Post
Filters should be changed twice a year at a minimum preferably before each season summer/winter. Depends on how much you use the system and pets.
You may get by with a 6 month interval with a 4" pleated media filter in a clean home but the regular 1" filters will likely need changing every month.
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