Aprilaire Air Cleaner Filter Media, 20″ x 25″ x 6″, MERV 13

Aprilaire Genuine OEM #213 Filter Media for Electronic Air Cleaners. This filter is 20" x 25" x 6". This is the high efficiency MERV 13 filtering media, which is the heart of your air cleaner. Removes 90% of pollen, mold, and dust particles, and permanently traps indoor allergens that can lead to respiratory problems. Replacement is suggested once a year or after one heating and one cooling season. Holding the filter up to light will show the amount of dirt. Only the intake side should be dirty, the side of the filter that the air exits from should remain dust…