Filter Fit FinderLennox · media air cleaner · media air cleaner cabinet
Lennox PureAir PCO3-16-16 replacement filter
Use part Y6605. Lasts up to 12 months.
The filter that fits
Maker lists this modelLennox Y6605 MERV 16
Healthy Climate PureAir MERV 16 Carbon Clean 16 Pleated Filter, 16 x 26 x 5 in
- Part number
- Y6605
- How many
- 1 per unit
- How often
- Lasts up to 12 months
- Size
- 16 x 26 x 5 in nominal (H x D x W); actual 16-3/8 x 25-1/2 x 4-3/8
Lennox's handbook does not state a filter count per unit; its annual maintenance kit holds one filter.
Opens an Amazon search for Lennox Y6605 MERV 16. Check the listing says Y6605.
Look-alike models that take a different filter
The PCO3-14-16 is sized for Lennox air handlers and takes a 20 x 21 x 5 filter; the PCO3-16-16 and PCO3-20-16 are furnace cabinets with 16 x 26 x 5 and 20 x 26 x 5 filters.
Other genuine options from Lennox
Variants and kits the maker sells for this model. Same fit, different media or packaging.
- PureAir annual maintenance kit (MERV 16 filter, UVA lamp and PureAir cartridge); 4-pack Y6614
Y6612 · Find on Amazon - PureAir cartridge
Y6607 · Find on Amazon
Sources
High confidence: the manufacturer names this exact model on a live page. Each line is the page we read and the day we read it.
- 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. PCO3-16-16; 'MERV 16 Carbon Clean 16 Pleated Filter Catalog Number' Y6605; filter size H x D x W nominal 16 x 26 x 5, actual 16-3/8 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'