Lennox X4137 HEPA-20 Activated Carbon Pre-Filter

Description

Lennox X4137 Healthy Climate HEPA-20 Carbon Pre-Filter

Three-Stage Filtration Process:

1. Pre-filter – an inexpensive pre-filter to remove larger particulates from the air. This is important to prolong the life of the HEPA filter. Rated MERV 6. Estimate life – 12 months.
2. HEPA – removes 99.97% of particulates down to 0.3 micron. Estimate life 2-5 years.
3. Carbon – 1/2 in. (13 mm) thick carbon filter for removing chemicals and odors from the air. Replace filter when it no longer seems to capture odors, or once every 3 months. Optional carbon canister can be used in place of the carbon filter. Estimated life of the carbon canister is 6 months.

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