For air conditioning.....please do yourself a favor and DONT use 3M of any kind , Kirkland woven and pleated filters as your just asking for longer cooling cycles, higher bills, frozen coils , defrosting coils and defrosting coils mean water in your furnace and fried electric components which are HUGE money for repairs these days.
I've been in the HVAC industry for 30 years and the crap I see which is all preventable is amazing
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