The MANN+HUMMEL 24x36x1 MERV 13 air filter is designed to be a high performance and efficient filter to capture and block allergens, bacteria, virus carriers, dust, pollen, and other microscopic particles while maintaining a low pressure drop. These filters provide a more efficient and effective filtration application for your HVAC system than standard pleated air filters assuring overall outstanding performance. These filters have a MERV 13 rating per ASHRAE Test Standards of 52.2. Applications where these filters are most suitable include residential, commercial office buildings, hospital settings, laboratories, and a wide array of other industrial facilities where maintenance personnel or homeowners require an increased level of cleaner air quality. The filter is constructed with a sturdy water-resistant beverage board frame with wire supported media. The MERV 13, MPR 1900-2200, FPR 10 rated filter is composed of an electrostatic blend of synthetic fibers allowing for optimal air filtration making this an ideal filter for your facilities requirements. All filters are made in the USA.