The Filter King Merv 8 20x30x1 4-Pack Air Filter has an actual size of 19.5x29.5x.75. These pleated 1-inch air filters are designed to last up to 90 days and are ideal for maintaining the efficiency of your heating and cooling systems. It is crucial to measure your filter properly before purchasing.

This MERV 8 rated 4-pack air conditioner filter is fully manufactured in the United States, using the highest quality materials and construction. It is EPA Establishment Number: 103501-FL-1 certified.

The filters can last up to 90 days before needing replacement, and it is recommended to change the home air filter every 30 - 90 days for 1-inch filters to help maintain the longevity of the intended application, such as air conditioning and heaters.

The pleated design of the filter captures more particles and extends the lifetime of the filter. Merv Filters trap airborne particles without impacting air flow, and users can feel the difference in 48 hours.

The installation process is fast and easy, with a simple "Open, Slide and Close" procedure to replace the air filter in your home effectively.

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