18x 18 x 1 Washable Electrostatic Furnace Air Filter, All-Filters, Mfr#: 18181.E

This electrostatic furnace filter is a permanent filter which will last for years with proper care. The electrostatic materials we use capture dust, dirt, pollen, pet dander, allergens, pet hair, and other household irritants. A replaceable carbon pre filter can be added for odor and VOC’s removal. These filters should be washed every 3 months for maximum efficiency.MERV 7