Aitecac 4-Pack MERV 13 Filter for ACF4/ACF6 Air Filter Box

Air Filter: MERV-13 air filter for ACF4/ACF6 filter box, which minimizes the amount of air bypassing the filter. Actual Size: 12.08″ x 20.15″ x 0.78″.High Efficiency Filteration: MERV 13 air filters can effectively trap particles sized 0.3 to 1 and help filter out smoke, pollen, particulate matter in air and help reduce offensive odors without reducing air flow.Improve Indoor Air Quality: Efficient HVAC filters provide cleaner, and fresher air for all inhabitants.Easy & Simply to Use: Just open up your vent and remove the used filter, make sure the airflow arrows are pointing toward your HVAC unit, then put new filter in designated location.Regular Replacement: It is recommended to change your filters every 6 months for maximum efficiency. This depends on the air quality of the space in which the filter is used.