Home > Air Filters > Shop By Filter Size > 4 Inch Filters > Lennox Healthy Climate

Sort By: Price: Low to High Price: High to Low Most Popular Title Manufacturer Newest Oldest Availability 30 per page 60 per page 120 per page 180 per page 300 per page Page of 1 Lennox 17x26x4 x6664 Box Filter Our Price: $35.00 Lennox 17x26x4 x6666 MERV 16 Box Filter Our Price: $119.00 Lennox 21x26x4 x6667 Box Filter Our Price: $40.00 (1) Lennox Healthy Climate x6664 Box Filter Nominal Size: 17" x 26" x 4" Exact Size: 16.625" x 26.75" x 4" Filter Rating: MERV 11 Expected Duration: 6 to 12 months Lennox Healthy Climate x6666 Box Filter Nominal Size: 17" x 26" x 4" Exact Size: 16.625" x 26.75" x 4" Filter Rating: MERV 16 Expected Duration: 6 to 12 months Lennox Healthy Climate x6667 Box Filter Nominal Size: 21" x 26" x 4" Exact Size: 21.25" x 26" x 4" Filter Rating: MERV 11 Expected Duration: 6 to 12 months Lennox 21x26x4 x6667 Box Filter (2pack) Our Price: $70.00 Lennox 21x26x4 x6669 MERV 16 Box Filter Our Price: $120.00 (3) Lennox Healthy Climate Merv 13 Model HCF14-13 Our Price: $40.00 Lennox Healthy Climate x6667 Box Filter Nominal Size: 21" x 26" x 4" Exact Size: 21.25" x 26" x 4" Filter Rating: MERV 11 Expected Duration: 6 to 12 months Lennox Healthy Climate x6669 Box Filter Nominal Size: 21" x 26" x 4" Exact Size: 21.25" x 26" x 4" Filter Rating: MERV 16 Expected Duration: 6 to 12 months Lennox Healthy Climate Merv 13 Part # 19L14 OEM Merv 13 Nominal Size: 20x20x5 Exact Size: 20" x 19 3/4" x 4 3/8" Lennox Healthy Climate Merv 13 Model HCF16-13 Our Price: $45.00 Lennox Healthy Climate Merv 13 Model HCF20-13 Our Price: $48.00 Lennox Healthy Climate Merv 13 Part # 19L16 OEM Merv 13 Nominal Size: 16x25x5 Exact Size: 15 3/8" x 24 3/4" x 4 3/8" Lennox Healthy Climate Merv 13 Part #19L17 OEM Merv 13 Nominal Size: 20x25x5 Exact Size: 19 3/4 x 24 3/4" x 4 3/8"