Filter King AF21x24x1A-M8 Merv 8 Air Filter 21x24x1

Product Description

The FILTER KING AF21x24x1A-M8 is a MERV 8 pleated air filter designed for residential and light commercial HVAC systems. With a nominal size of 21x24x1 inches and an actual size of 21 x 24 x 0.75 inches, this filter fits standard 1-inch filter slots and delivers reliable mechanical filtration of airborne particles. MERV 8 filtration captures dust, pollen, mold spores, and lint-class particles, making it a practical choice for routine system protection and indoor air quality maintenance. This filter is sold in a quantity of 10 per order, suitable for stocking up on scheduled filter change intervals.

This filter is installed in forced-air HVAC systems, including gas furnaces, heat pumps, and air handlers equipped with standard 1-inch return-air filter grilles or filter racks. It is appropriate for residential applications and light commercial environments where a balance of airflow and filtration efficiency is needed. MERV 8 is a widely specified rating for standard replacement cycles, typically every 60 to 90 days depending on system runtime and indoor conditions.

Key Features

• MERV 8 rated filtration captures dust, pollen, mold spores, and similar particles
• Nominal size 21x24x1 inches fits standard 1-inch filter slots
• Actual dimensions 21 x 24 x 0.75 inches for proper fit in most compatible housings
• Pleated media construction increases surface area for improved particle capture
• Sold in a pack of 10 to support scheduled maintenance intervals

Compatibility

Designed as an OEM-style replacement for residential and light commercial forced-air systems that accept a nominal 21x24x1-inch pleated air filter in a standard 1-inch filter rack or return-air grille.

Installation Notes

Air filters of this type are installed by HVAC technicians or qualified service personnel as part of routine preventive maintenance. Power down the air handler or furnace before opening the filter compartment and removing the old filter. Insert the new filter with the airflow direction arrow on the frame pointing toward the blower. Follow local mechanical codes and manufacturer service intervals for replacement frequency.