Accumulair 20X21 5X1 Actual Filter Furnace Review

20x21.5x1 (Actual Size) MERV 8 – Tested and rated according to ASHRAE Standard 52.2. Captures up to 76% of common airborne particles such as dust, lint, dust mite debris, cement dust, standing dust, small fibers, and other airborne contaminants. Enhances indoor air quality for up to 3 months. Pleated electrostatic media provides a high filtration efficiency without comprising your system's airflow. Typically ideal for residential homes, small commercial businesses, and workplaces desiring to reduce common airborne containments.