Just plain bad customer service
Update, 26 July: AVOID THIS COMPANY. I finally got them to agree to providing a FedEx shipping label (at my cost, of course) but when I tried to ship their product back at the two locations near me, neither of them could either provide me with said shipping label or print one out for me. Looks like I’ll be eating the cost, for buying undersized filters since they haven’t responded to me since. Original review: I wouldn’t recommend purchasing filters from Filterbuy. I recently purchased filters based on the nominal size of my air return, and the filters were too small. I guess they’re trying to save money by selling smaller filters? If I want to order a filter from them that actually fits my register, I’ll need to pay extra for a “custom filter” since the actual size of my register is about 3/8” larger than what they sold. No thanks, I’ll just buy filters that fit my register by default. Now I get to pay to ship back the intentionally undersized filters, and not get a full refund because I happened to put one in. Confusing filter sizes is what will keep me away from Filterbuy.