AAF Flanders 12 In. X 20 In. X 1 In. Nested Fiberglass MERV 4 Air Filter

Product Description

This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners around the world for over 50-year. The filtering medium is continuous filament spun glass. The frame is made with 1 continuous piece of chipboard to guard against corner separation. For peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use. Buy a case and be set for the year.Lasts up to 30-daysChange filters monthly for peak energy efficiencyLow airflow resistanceUL class IIFor furnaces and central air conditionersUL listed for safety