Lennox X6670 Replacement Filter
Lennox X6670 Healthy Climate HCF16-11, Replacement Filter, MERV 11, Nominal Size 16" x 25" x 5", Actual Size 15 3/4" x 24 3/4" x 4 3/8", 1600 CFM, Pleated
X6670 is identical to X667001
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