Aerostar Series 400 Pleated Furnace Air Filter 20x25x4 MERV 8 Standard Capacity

The Aerostar Series 400 pleated furnace air filter is designed to improve indoor air quality while maintaining efficient airflow throughout your HVAC system. Built with advanced 100% synthetic filter media, it effectively captures airborne particles such as dust, pollen, mold spores, lint, and pet dander to help create a cleaner and healthier indoor environment.

Featuring a MERV 8 efficiency rating, this 4-inch pleated air filter offers increased dust-holding capacity and extended service life compared to standard 1-inch filters. Its low airflow resistance supports efficient HVAC performance while helping protect coils, ductwork, and other system components from dirt and debris accumulation.

Ideal for residential, commercial, and light industrial HVAC applications, this 20x25x4 furnace filter is engineered to handle higher airflow rates and should be replaced based on system usage, indoor air quality, and environmental conditions such as pets, allergies, and seasonal dust levels.