It charges shipping if you go over quantity of 2. If there's no work around, can we just buy two and a third one individually and still qualify for this rebate? I guess that would be a question for the rebate company.
Edit: i just updated from 2 to quantity 3 and it says free shipping. Might want to try that instead of adding 3 outright.
I buy cheap filters and switch them out often, ecomfort has free shipping and i get 6 pack of 16x24x4 for 37 bucks
All of the merv settings are marketing gimmick, but when your filter gets clogged you get real performance drop and furnace/ac just eats your money.
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