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Lennox X6670 (3-Pack) - 16" x 25" x 5" Healthy Climate HCF16-11 Replacement Filter, MERV 11 - Walmart.com
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Filters Fast Compatible Replacement for Lennox X6670 Size 16x25x5 Air Filter MERV 11 AC Furnace Filters, 2-Pack - Walmart.com
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Filterbuy 16x25x5 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1029, Lennox X6670, Carrier, Bryant, & More (Actual Size: 15.75 x 24.75 x 4.38) - Amazon.com
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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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X6670 Lennox OEM Merv 11 Filter Media 16"X25"X5" Fits X6660 HCC16-28 Genuine Lennox X6670 (2 X Pack of 2) - Amazon.com
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