Lennox X6669 MERV 16 Filter 21x26x4 Genuine Lennox Product

The Lennox X6669 Healthy Climate PureAir replacement filter uses a MERV 16 pleated filter to capture extremely small airborne particles. Dimensions: 21" x 26" x 4" In most home environments, this filter only needs to be replaced every 6 months. The PCO-20C Healthy Climate PureAir Air Purification System requires that you change the UVA Lamps and the Filter every year.