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Lennox X6675
Lennox OEM filter number — match X-number; aftermarket sizes must match the cabinet.
Fitment facts
| Field | Value |
|---|---|
| Brand | Lennox |
| SKU | X6675 |
| Role | OEM HVAC filter |
| Often confused with | X6670, X6672 |
| Hard stop | X6675 ≠ X6672 |
| Confirm | Furnace/air handler filter door label |
| Interval | 1–3 months typical for 1″ panels; media cabinets per OEM |
Hard stop
X6675 ≠ X6672
Before you buy
- Hard stop: X6675 ≠ X6672
- Confirm: Furnace/air handler filter door label
- Often confused with: X6670, X6672
- Interval: 1–3 months typical for 1″ panels; media cabinets per OEM
- Read W × L × T on the filter frame edge.