HVAC Filters is designed to offer moisture or oil mist laden air cool metal surfaces to condense on which removes these corrosives from the air. HVAC Filtersoperates most effectively at 450 fpm to 550 fpm with an efficiency of >90% on moisture droplets > 20 micrometers. The filter also acts as a particulate filter due to its design of multiple layers of woven wire, which become wet as the filter starts removing moisture and oil from the air stream. This filter is designed to be installed with a drain system to remove unwanted moisture, oil, or grease condensation from the filter media.