Lennox X4137 Healthy Climate Carbon Pre Filter for HEPA 20 Air Cleaner.
- Lennox/Healthy Climate Part No. X4137
- Carbon PreFilter Replacement for Lennox Healthy Climate HEPA 20 Filtration System
- Removes large particles from the air and extends the life of the HEPA Filter
- Recommended to change every 6 to 12 months
- MERV 6 Rated