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EconoHome 16x25x4 AC Furnace Pleated Air Filter MERV 11 Replacement – Allergen Defense, 3 Pack, Fits Lennox (X6670), Honeywell (FC100A1029) filters. (Actual size: 15.94 x 24.86 x 4.36 Inches) - Amazon.com
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Lennox X6670 16x25x5 MERV 11 Healthy Climate Filter - $52.99
Lennox X0587 20x26x5 MERV 10 Furnace Filter - 2 Pack - Atomic Filters
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Lennox X6670 MERV 11 Box Replacement Filter also for Honeywell, 16" H x 25" L x 5" W - Humidifier Replacement Filters - Amazon.com
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Filters Fast FF16255X6670M13 Replacement for Lennox X6670 MERV13, 16x25x5 - 2-Pack
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Lennox X6670 MERV 11 Box Replacement Filter also for Honeywell, 16" H x 25" L x 5" W (3-Pack) - Amazon.com
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Lennox 19L16 - 16" x 25" x 5" Healthy Climate HCF16-13 Air filter, MERV 13
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