20x25x1 AC Furnace Air Filter, MERV 13, MPR 1900, Premium Allergen, Bacteria & Virus Filter, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 19.69x24.69x0.78 in)

The filters were the perfect size to create a a diy room air filtration system along the lines of a Corsi Rosenthal box (google it). Great product and just what I wanted

My wife and I have been using these filters and they are great quality. We got it a great price and highly recommend

Très bon produit. De plus, un malentendu sur la commande a été promptement corrigé par le fournisseur, à ma très grande satisfaction.

Muy buenos

I use these filters in sets of four for my DIY Corsi-Rosenthal style air purifier (just search online for “DIY air purifier”). The filters are very efficient and last longer than their cheaper and flimsier counterparts. These are much more expensive at the big box stores but often go “on sale” on Amazon. When they do, I stock up.

I have always used these after getting our new AC unit. There is a difference and you can tell when you change them out and see all the dust they collect.