Lennox Healthy Climate PureAir X8789 PCO16-28 MERV 16 replacement filter - 16" x 26" x 5". The Lennox Healthy Climate PureAir replacement furnace filter uses a MERV 16 pleated filter to capture particles in the air stream. In most home environments, this filter only needs to be replaced every 6 months.

The PureAir Air Purification system uses Photocatalytic Oxidation process for removing today's most common household pollutants.  It is far and away the "Best" system for attacking all three classes of contaminants - particles, bioaerosols, and odors/chemicals. The PureAir system removes 75% of particles down to 0.3 micron, 60% of bioaerosols down to 0.3 micron, and it removes odors and destroys 50% of chemicals within a 24-hour period. According to Lennox, the PureAir system "cleans the air in your home better than any other system you can buy."