Filtrete 20 In. x 25 In. x 4 In. 1000 MPR Allergen Defense Deep Pleat Furnace Filter, MERV 11 Pack options:Pack of 1 2" drain opening fits PVC

2" drain opening fits PVC or ABS Schedule 40 DWV (drain waste vent) pipe

motor shell

coarse diamond

small trim

Heating element cycles on and off to maintain the set temperature

Filtrete 20 In. x 25 In. x 4 In. 1000 MPR Allergen Defense Deep Pleat Furnace Filter, MERV 11 Pack options:Pack of 1 2" drain opening fits PVCOpt for a Filtrete Allergen DefenseAir Filter to transform your central heating and cooling system into a whole home air filtration operation. This no nonsense filter helps capture varying sizes of particles, from the large (lint, pollen, dust and pet dander) to the microscopic (smoke and smog). %search_data%NADP03 4IN 4