Best Furnace Filter For Lennox

Filtrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, Allergen, Bacteria & Virus, Electrostatic Air Cleaning Filter, 4-Pack (actual size 19.88 x 24.63 x 4.31)

Filtrete 20x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Lennox & Honeywell Devices, Allergen Defense, Electrostatic Air Cleaning Filter, 4-Pack (actual size 19.88 x 24.63 x 4.31)

Nordic Pure 20x25x5 MERV 14 Pleated Lennox X6673_X6675 Replacement AC Furnace Air Filters 4 Pack

Lennox 20x25x5 Furnace Filter, X6675 Filter Replacement, Merv 16 Carbon Clean Filter Media with Homequip Disposal Bag

Carmerny 16x25x5 X6672 MERV 16 Furnace Filter Compatible with Lennox X6672 Healthy Climate Carbon Clean for Furnace HVAC System (Actual Size: 15.75 x 24.75 x 4.37 In), Part Number HCF16-16, Pack of 2

Nordic Pure 20x25x5 (4-3/8 Actual Depth) Plus Lennox X6673 Replacement AC Furnace Air Filter, 2 PACK, MERV 12 Pleated + Carbon, 2 Piece

Nordic Pure 20x25x5 (4-3/8 Actual Depth) Lennox X6673 Replacement MERV 10 Pleated AC Furnace Air Filter, Box of 2

Filterbuy 20x20x5 Air Filter MERV 13 Optimal Defense (3-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Honeywell FC100A1011 and Lennox X0585 (Actual Size: 19.63 x 19.81 x 4.38 Inches)

Zomixzo X6675 20x25x5 MERV 16 Filter Compatible with Lennox X6675 Carbon Merv 16 Home Furnace Filter for HVAC System, Part Number HCF20-16, (Actual Size: 19.8 x 24.8 x 4.3 In), 3 Pack

Filterbuy 20x20x5 Air Filter MERV 11 Allergen Defense (3-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Honeywell FC100A1011 and Lennox X0585 (Actual Size: 19.63 x 19.81 x 4.38 Inches)