20 in. x 30 in. x 1 in. Allergen Plus Pleated Furnace Air Filter FPR 7, MERV 1

The HDX Allergen Plus is made of wire-backed pleated media with a large surface area which increases the filter’s dust-holding capacity and improves its efficiency. The filter’s media is charged electrostatically which means it captures and traps particles that would otherwise bypass the filter. The HDX Allergen Plus is easy to replace making change-outs quick and keeping indoor air quality at its optimal level.