Filter Fit FinderLennox · media air cleaner filter
Lennox Y6604 MERV 16
Healthy Climate PureAir MERV 16 Carbon Clean 16 Pleated Filter, 20 x 26 x 5 in. Part Y6604. Lasts up to 12 months. Fits 1 model.
Opens an Amazon search for Lennox Y6604 MERV 16. Check the listing says Y6604.
Fits these models
Part numbers
- Genuine part
- Y6604
- How often
- Lasts up to 12 months
- What is in it
- MERV 16 Carbon Clean 16 pleated filter
- Size
- 20 x 26 x 5 in nominal (H x D x W); actual 20 x 25-1/2 x 4-3/8
Sources
- Which filter fits lennox.com Maker's own page checked Oct 1, 2026
Lennox PCO3 handbook (ehb_pco3_2304, April 2023), PDF p4: Model No. PCO3-20-16; 'MERV 16 Carbon Clean 16 Pleated Filter Catalog Number' Y6604; filter size H x D x W nominal 20 x 26 x 5, actual 20 x 25-1/2 x 4-3/8
- How many lennox.com Maker's own page checked Oct 1, 2026
PDF p4: Annual Maintenance Kit 'includes 1 of each per kit': Carbon Clean 16 (MERV 16) Media Air Filter (1), Replacement UVA Lamp (1), Replacement PureAir Cartridge (1)
- How often lennox.com Maker's own page checked Oct 1, 2026
PDF p4: 'Filter life Up to 12 months'; 'Recommended annual replacement of the filter'