Fits checked Oct 1, 2026 · How we check
Filter Fit Finder
Menu

Lennox · humidifier filter

Lennox X2661 (#35) water panel

Healthy Climate #35 Replacement Humidifier Water Panel. Part X2661. Replace annually or if performance drops. Fits 4 models and their listed variants.

Buy X2661 (#35) water panel on AmazonManufacturer page

Opens an Amazon search for Lennox X2661 (#35) water panel. Check the listing says X2661.

Fits these models

Part numbers

Genuine part
X2661
How often
Replace annually or if performance drops
What is in it
expanded aluminum water panel
Size
10 x 13 x 1-3/4 in

Sources

  • Which filter fits lennoxpros.com Maker's own page checked Oct 1, 2026
    Lennox X2661, Healthy Climate #35 Humidifier Water Panel ... Replacement Humidifier Pad for Healthy Climate Humidifiers: HCWB2-17, HCBW2-17A, HCWB3-17, HCBW3-17A, HCWP2-18, HCWP2-18A, HCWP3-18, HCWP3-18A
  • How many lennox.com Maker's own page checked Oct 1, 2026
    Lennox Healthy Climate humidifier operating manual (form 10009367, 04/2011; covers HCWB3-12, -12K, -12A, -12AK, HCWB3-17, -17K, -17A, -17AK, HCWP3-18 and HCWP3-18A), linked from lennox.com's current HCWB17 and HCWP18 pages, maintenance steps slide the single humidifier pad out of the scale control insert and insert a new one
  • How often lennox.com Maker's own page checked Oct 1, 2026
    Lennox Healthy Climate humidifier operating manual (form 10009367, 04/2011; covers HCWB3-12, -12K, -12A, -12AK, HCWB3-17, -17K, -17A, -17AK, HCWP3-18 and HCWP3-18A), linked from lennox.com's current HCWB17 and HCWP18 pages, PDF p4: 'For best performance, you should replace the humidifier pad in your humidifier at least annually' ... 'Replace Humidifier Pad annually or if performance drops'
  • Size lennoxpros.com Maker's own page checked Oct 1, 2026
    Additional Information 10" W x 13" H x 1-3/4" D
Show all 6 sources

Which filter fits

  1. lennoxpros.com Maker's own page checked Oct 1, 2026
    Lennox X2661, Healthy Climate #35 Humidifier Water Panel ... Replacement Humidifier Pad for Healthy Climate Humidifiers: HCWB2-17, HCBW2-17A, HCWB3-17, HCBW3-17A, HCWP2-18, HCWP2-18A, HCWP3-18, HCWP3-18A
  2. lennox.com Maker's own page checked Oct 1, 2026
    Lennox Healthy Climate humidifier operating manual (form 10009367, 04/2011; covers HCWB3-12, -12K, -12A, -12AK, HCWB3-17, -17K, -17A, -17AK, HCWP3-18 and HCWP3-18A), linked from lennox.com's current HCWB17 and HCWP18 pages, PDF p5 (power humidifier maintenance, unit with power cord): 'Replace humidifier pad annually or if performance of the humidifier drops. (Catalog No. X2661)'
  3. lennox.com Maker's own page checked Oct 1, 2026
    Lennox Healthy Climate humidifier operating manual (form 10009367, 04/2011; covers HCWB3-12, -12K, -12A, -12AK, HCWB3-17, -17K, -17A, -17AK, HCWP3-18 and HCWP3-18A), linked from lennox.com's current HCWB17 and HCWP18 pages, PDF p4: 'Replace Humidifier Pad annually or if performance drops (Catalog No. X2660 for Models HCWB3-12, HCWB3-12K, HCWB3-12A and HCWB3-12AK, and Catalog No. X2661 for Models HCWB3-17, HCWB3-17K, HCWB3-17A and HCWB3-17AK)'

How many

  1. lennox.com Maker's own page checked Oct 1, 2026
    Lennox Healthy Climate humidifier operating manual (form 10009367, 04/2011; covers HCWB3-12, -12K, -12A, -12AK, HCWB3-17, -17K, -17A, -17AK, HCWP3-18 and HCWP3-18A), linked from lennox.com's current HCWB17 and HCWP18 pages, maintenance steps slide the single humidifier pad out of the scale control insert and insert a new one

How often

  1. lennox.com Maker's own page checked Oct 1, 2026
    Lennox Healthy Climate humidifier operating manual (form 10009367, 04/2011; covers HCWB3-12, -12K, -12A, -12AK, HCWB3-17, -17K, -17A, -17AK, HCWP3-18 and HCWP3-18A), linked from lennox.com's current HCWB17 and HCWP18 pages, PDF p4: 'For best performance, you should replace the humidifier pad in your humidifier at least annually' ... 'Replace Humidifier Pad annually or if performance drops'

Size

  1. lennoxpros.com Maker's own page checked Oct 1, 2026
    Additional Information 10" W x 13" H x 1-3/4" D