4.5in Air Filter Box with MERV 11 Filter for 21" wide Air Handlers (AM11-2020-AC)

A MERV 11 media air cleaner for residential applications, that helps remove a wide range of airborne particles as small as 0.3 micron Intuitively designed with outer dimensions that match original equipment furnace and air handler.

This filter box is designed for air handlers and is 20" x 20". (Air handlers that are 21" wide, "C" width)

Note: This is the filter box ONLY.