Aerostar Series 1100 Pleated Furnace Air Filter 20x20x4 MERV 11 High Efficiency

The Aerostar Series 1100 pleated furnace air filter provides advanced MERV 11 filtration performance with durable construction designed for residential, commercial, and industrial HVAC applications. Featuring 100% synthetic filter media, this high-efficiency filter captures airborne particles while maintaining consistent airflow and protecting HVAC equipment.

The synthetic media is laminated to an expanded metal support grid on the air-exiting side, preventing pleat fluttering and maintaining uniform pleat structure. The heavy-duty moisture-resistant frame, integrated media retainers, and bonded filter pack help minimize air bypass while providing reliable performance under demanding operating conditions.

Designed for 20x20x4 HVAC systems, the Aerostar Series 1100 filter handles air velocities up to 625 FPM while delivering low initial pressure drop and extended service life. It is ideal for residential, commercial, and industrial applications requiring higher-efficiency filtration to protect coils, ductwork, and HVAC components.