Aerostar 20x20x5 Replacement Air Filter for Honeywell FC100A1011 Air System, Lennox X0585

The Aerostar 20x20x5 Replacement Air Filter for Honeywell FC100A1011 and Lennox X0585 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.