21x21x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated AC Furnace Filters | Actual Size 21 x 21 x .75

Confirm filter size before purchase. Made to protect your homes accommodating air systems. Air systems like HVAC or furnaces need filters in place to keep the incoming airflow free of intruding particles. MERV 8: Most common filter on the market. Applicable in most commercial buildings, residences, industrial workplaces, and paint booths. SAVE MONEY: Our filters can not only be good for your health but also your wallet. Replacing air filters can save you thousands of dollars in repairs and can lower your monthly energy bills WHEN TO REPLACE: It is recommended to change the HVAC/Furnace filter every 1-3 months. The environment of your filter plays a large part in how long they last and the required frequency of replacement. Air filters in different environments block airborne irritants and prevent complications resulting from lack of filtration. However, while the location is different, the purpose of cleansing the air you breathe is the same. FAST & EASY INSTALLATION: Open, Slide and Close. Simple yet effective air filters. For best results, it is recommended to replace your HVAC and furnace filters every 1-3 months.