Field Controls 46600406 Flex-3 Flex Filter 16" X 20" X 4" or 20" X 20" X 4"

The Field Controls 46600406 Flex Filter Flex-3 is an air purifier component used in air cleaning units that support multiple cabinet sizes in HVAC systems. It has 16" x 20" x 4" or 20" x 20" x 4" filter housing. It is used in the return air path of heating and cooling systems, where it captures dust, lint, and airborne particles before air reaches the air handler or furnace. It helps to maintain stable airflow and system efficiency in central equipment.