Lennox Furnace Filters Sale
March 20, 2025 | Category: filter, Furnace filters, Indoor Air Quality - IAQ

Lennox furnace filters, that we install with Lennox air purifiers Oh ****, are mostly models X6670 and 6673 by Lennox catalog. They are good for one year of normal use. Normally, we always have them in stock, but, just in case, ask before coming.
Both furnace filters, X6670 and X6673, are rated MERV11. They are good for one year of normal use.
Use Only Genuine Lennox Healthy Climate Furnace Filters

The filter on the picture is the most popular size of the Lennox furnace filter. It has a nominal size 16″x25″x5″ but the actual physical size is different. It is 15 3/4″ x 24 3/4″ x 4 3/8″.
Furnace filters from other manufacturers also have nominal sizes different from theirs physical sizes. That’s why if you buy furnace filter from another manufacturer with the same nominal size 16x25x5, It will have different physical sizes, and it won’t fit into Lennox filter cabinet.
This filter has the Part number X6670. Use it when you order filters for your furnace.
The next bigger size is X6673. it has nominal size 20x25x5.
We do have both filters in stock most of the time. But just in case, inquire before coming. The price of X6670 is $40/ea. X6673 price is $45/ea.
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