Aerostar Series 400 Pleated Furnace Air Filter 18x24x4 MERV 8

The Aerostar Series 400 pleated furnace air filter provides reliable MERV 8 filtration for commercial and industrial HVAC applications. Featuring advanced 100% synthetic media, this 18x24x4 filter captures dust, pollen, mold spores, pet dander, and other common airborne contaminants while helping protect HVAC system components.

The synthetic filter media is laminated to an expanded metal support grid on the air-exiting side, providing added strength during installation while preventing pleat fluttering and maintaining consistent airflow performance. The heavy-duty, moisture-resistant die-cut frame helps prevent warping, cracking, and distortion under normal operating conditions.

Designed for 18x24x4 HVAC systems, the Aerostar Series 400 MERV 8 standard-capacity filter handles air velocities up to 625 FPM while delivering efficient filtration with low airflow resistance. It is ideal for commercial buildings, schools, offices, industrial facilities, and HVAC applications requiring dependable protection for coils, ductwork, and other equipment.