Lennox X1152 MERV 11 Filter - 20" x 25" X 5" - Replacement Furnace Filters - Amazon.com
San Antonio Lennox HVAC Services and Heat Pump Solutions
Help finding air filter on Lennox ML180UH : r/HVAC
Tier1 Pleated Air Conditioner/Furnace Filter - 20x20x5 - MERV 13 Rated - Replacement for Lennox X0585, X8305, X8308, X7930, X7935, Trion Air Bear 255649-102 - Made in USA - 2 Pack - Home And Garden Products - Amazon.com
Help finding air filter on Lennox ML180UH : r/HVAC