I was a member of the Filterbuy program a year ago and quit thinking I could buy local big box, but I never remembered and locally the filters cost more, and didnt filter as well. After my allergies started acting up I started Filterbuy again, and within days my allergies were gone. Ill be Filterbuy for life now.
I love these filters! I started using them at the very beginning of the Covid outbreak the Merv 15 I believe and nobody in my household has tested positive yet!