Replacement for Lennox 21x26x4" (X6669, X6667)

Showing 1 -  5 of 5 Products
Lennox Model X6669 MERV 16 Filter for PCO-20C - 21 x 26 x 4
$205.95 / Filter
$257.44 Save 20%!
1 Pack Selected
$205.95
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Lennox Model X6667 MERV 11 Replacement Filter - 21 x 26 x 4, 2-Pack
$42.95 / Filter
$53.69 Save 20%!
2 Pack Selected
$85.90
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Lennox Model X6667 MERV 11 Replacement Filter - 21 x 26 x 4
$46.95 / Filter
$58.69 Save 20%!
1 Pack Selected
$46.95
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Lennox Model X6669 MERV 16 Filter for PCO-20C - 21 x 26 x 4, 2-Pack
$199.95 / Filter
$249.94 Save 20%!
2 Pack Selected
$399.90
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MERV 16 Replacement for Lennox X6669 Filter - 21 x 26 x 4
$110.19 / Filter
$137.74 Save 20%!
1 Pack Selected
$110.19
Ships Free!
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What Our Customers Have to Say

Clare 1 day ago
5
Super product.....just sorry it's made such a hike in price since I first started using it. Well-made, easy to order....fast delivery
WallyH 1 day ago
5
This filter is the perfect match for our Goodman furnace. It does a great job filtering dust and fine particles, and lasts up to 3 months.
Alex K. 1 day ago
5
Very high-end furnace filter. When it is on-sale (35% off) I like the value allot. That's why I bought it
J. C. 1 day ago
5
I have been using this quality product for many years. It has become much more pricey in the last few years even with the discount so I am looking for alternatives.