FitCheckrWhole-house media air filter compatibility
X6673 Compatible Models
Lennox X6673 Healthy Climate MERV 11 Filter
LennoxLennoxBrandBrand
OEMOEMStatusStatus
12 moAbout every 6-12 months depending on system useIntervalReplacement interval
Compatible devices
Before choosing this replacement
- Confirm your exact device model, not only the product family.
- Compare the old part number against X6673.
- Check whether the listing includes the full kit or only one filter piece.
Not a universal part
X6673 should be matched to listed models and official part references. Similar-looking replacements can differ by seal, frame, cartridge latch, chip requirement, bag type, or pack contents.
Risk note: Lennox Healthy Climate filter numbers map to cabinet size and depth. Confirm X6673 before substituting generic 20x25x5 filters.
Source-backed compatibility
3 public source signals checked. FitCheckr weighs official pages, manuals, support docs, retailer listings, and public discussion summaries before showing a fit verdict.