For use with Goodman and Amana Brand 90% and greater upflow variable speed gas furnace models AMH95, AMS9, AMS95, GMH95, GMS9, GMS95, DMS9, AMV9, GMV9, GMV95, GKS9. This kit is intended to provide a location, external to the furnace casing, for installation of a permanent filter. The rack is mounted over the indoor air blower compartment area of either side panel, and provide filter retention as well as a location for attaching return air ductwork.