Lennox Replacement Air Filters

Replacement filters for Lennox ductless mini splits, including MWMA, MWMB, MWCA, MWCB, MWHA and MWHB wall-mounted indoor units and M33A / M33B ceiling cassettes, plus activated carbon freshness filters that help reduce odors from pets, cooking and tobacco. Every listing names the exact indoor unit models it fits.

Don't see your Lennox model? We can most likely still supply it. Lennox mini splits share filter designs with other major brands, and we stock those filters. We just haven't listed every one under its Lennox model number yet. Send us your indoor unit model number or a photo of the nameplate and a real person will match the right filters, usually within one business day.

The nameplate sticker is typically on the right-hand side of the unit or on the bottom edge facing the floor. Please use the indoor unit's model number, not the outdoor unit's. Most in-stock orders ship within 1 business day, and every filter we list or match for you is backed by our Compatibility Guarantee. See our mini split filter buying guide for care tips.