Description
The Lennox 54W21 Air Filter 20″ X 20″ X 2″ is a pleated air filtration element used in forced-air heating and cooling systems to capture airborne particles circulating through return air streams. It is installed in air handling units, rooftop HVAC systems, and residential or commercial furnaces where it sits within the filter rack before the blower section. During operation, air passes through the MERV-8 media, which assists in reducing dust, lint, and pollen entering the coil and ductwork, supporting stable airflow and system efficiency.
