A ir Filter Quality

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tomtheelder2020

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Anticipating wildfire season here in CA, I plan to make a pair of home air filtration units, each consisting of a box fan and five 5" thick filters. I would like to keep the cost down but don't want to get a MERV 13 filter that is low cost because it is actually only filters to MERV 8. Also, I have not been able to find a single online source (big box, little box, or Amazon) that states the number of pleats in the filter let alone the total filter area (i.e. square inches if flattened out). Anyone know of sources for this kind of info or listing of brands that are reliably labeled?
 

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