What filter/pad fits a Aprilaire Lennox hcwb3-17 humidifier?

The Aprilaire Lennox hcwb3-17 humidifier uses the 35 replacement furnace/whole-house water panel.

Shop the 35 Amazon · we may earn a commission, at no extra cost to you

Key takeaways

Replacement part number: 35 (Aprilaire).
This is a furnace/whole-house water panel, not a portable-unit wick.
Replace once per humidifying season, or sooner if it's visibly scaled or discolored.
A cheaper aftermarket filter can fit the same slot - check reviews for real-world fit before buying.

Water Panel35Aprilaire

Furnace water panel

Buy the water panel for your Lennox hcwb3-17

Aprilaire 35The exact water panel.Shop 35 Cheaper water panel that fitsAftermarket water panels fit the same slot for less - check reviews for real-world fit before you buy.Shop compatible water panels

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Also known as

The 35 replaces (and is cross-referenced under) these part numbers: Stock No. 35, A35, A35-2PK-PDQ-3, A35W-PDQ-6, A35-PR, CCF-A35, HC26A1008, HC26E1004, HC26P1002, HC26P1002/U, X2661, RP0035, 3242RP, TT-PAD1, P110-3545, BAYPAD02A1310A, S1-HUPAD35, HC26P, A35WPR.

Also fits these humidifiers

American Standard ahumd300a American Standard ahumd500a American Standard athumd300 American Standard athumd300aba00b American Standard athumd300t American Standard athumd500 American Standard athumd500a American Standard athumd500apa00b Aprilaire 350 Aprilaire 360 Aprilaire 560 Aprilaire 5608 Aprilaire 560a Aprilaire 600 Aprilaire 600a Aprilaire 600m Aprilaire 700 Aprilaire 700a Aprilaire 700m Aprilaire 760 Aprilaire 760a Aprilaire 768 Bryant humbalbp2317 Bryant humbalbp2417 Bryant humbalfp1318 Bryant humbblbp2217 Bryant humbblbp2317 Bryant humbblbp2417 Bryant humbblfp1218 Bryant humbblfp1318 Bryant HUMBRLPB2417 Carrier humcalbp2317 Carrier humcalbp2417 Carrier humcalfp1318 Carrier humcclbp2217 Carrier humcclbp2317 Carrier humcclbp2417 Carrier humcclfp1218 Carrier humcclfp1318 Carrier humcclfp1418 Carrier HUMCRLPB2417 Clean Comfort HE17A2 Clean Comfort HE17M2 Clean Comfort HE18FA2 Clean Comfort HE18FM2 Coleman Spas s1-bp6000mc Coleman Spas s1-fp7000mc Honeywell he200 Honeywell he200a Honeywell he200a1000 Honeywell he250 Honeywell he250a Honeywell he250a1005 Honeywell he260 Honeywell he260a Honeywell he260a1002 Honeywell he260a1010 Honeywell he260a1044 Honeywell he260a1234 Honeywell he260b Honeywell he260b1000 Honeywell he265 Honeywell he265a1007 Honeywell he265b1005 Honeywell he265dg115 Honeywell he265h8908 Honeywell he265vpiaq Honeywell HE280 Honeywell he300 Honeywell he300a Honeywell he300a1005 Honeywell he360 Honeywell he360a1019 Honeywell he360a1050 Honeywell he360a1075 Honeywell he360b Honeywell he360b1009 Honeywell he365 Honeywell he365a Honeywell he365a1006 Honeywell he365b Honeywell he365b1004 Honeywell he365dg115 Honeywell he365h8908 Lennox hcwb2-17 Lennox hcwb2-17a Lennox hcwb3-17a Lennox hcwbk17a Lennox hcwp18a Lennox hcwp2-18 Lennox hcwp2-18a Lennox hcwp3-18 Lennox hcwp3-18a Lennox wb2-17 Lennox wp2-18 Luxaire s1-bp6000mt Luxaire s1-fp7000mt Nordyne 161 Nordyne 191 Nordyne 917863 Nordyne 917864 Ruud rxih-ab17a Tempstar hmiclb17a Tempstar hmiclb17b Tempstar hmiclf18a Tempstar hmiclf18b Toptech tt-hum-265 Toptech tt-hum-365 Totaline p110-lbp2217 Totaline p110-lbp2317 Totaline p110-lbp2417 Totaline p110-lfp1218 Totaline p110-lfp1318 Trane EHUMD300ABA00B Trane humd300a Trane humd500a Trane thumd300 Trane thumd300aba00b Trane thumd500 Trane thumd500apa00b York s1-bp6000my York s1-fp7000my

Filters for the rest of your home

FiltersDex covers the exact replacement filter - and what it removes - across every appliance:

Refrigerator filterswater + air, by fridge model Air purifier filtersLevoit, Coway, Honeywell, Winix Vacuum filtersShark & Dyson, HEPA + foam Under-sink & RO systemsAPEC, iSpring, Pentair - NSF Water pitcher filtersBrita, PUR, ZeroWater - NSF

Frequently asked

What filter/pad fits a Aprilaire Lennox hcwb3-17 humidifier?

The Aprilaire Lennox hcwb3-17 uses the 35 (Replacement Water Panel for Whole House Humidifiers), a furnace/whole-house water panel.

Is the 35 a wick or a furnace pad?

The 35 is a furnace/whole-house humidifier water panel, not a portable-unit wick.

How often should I replace the 35?

We don't have a manufacturer-listed replacement interval for the 35 - a common default is once per humidifying season, or sooner if it's visibly scaled or discolored.

Should I buy the OEM filter or an aftermarket one?

The genuine Aprilaire 35 is the safe, exact-fit choice. A cheaper aftermarket wick or pad can fit the same slot too - check reviews for real-world fit and how well it wicks water before buying, since humidifier filters aren't independently certified the way NSF-listed water filters are.