Thread: WHAT DID YOU DO TO YOUR HOME TODAY?
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Old 05-23-2023, 10:46 PM   #463
Sapphireho
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Quote:
Originally Posted by cjd View Post
More pleats is more surface area is lower pressure for a given filtration level. But it's hard to compare across brands too. Also 20x20x5 area all over the place on actual dimensions.
The ones I use have a merv rating of 13.
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