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AprilAire · humidifier filter

AprilAire Water Panel 35

AprilAire 35 Replacement Water Panel. Part 35. Replace at least once a year (manufacturer owner's manual). Fits 9 models and their listed variants.

Buy Water Panel 35 on AmazonManufacturer page

Opens an Amazon search for AprilAire Water Panel 35. Check the listing says 35.

Fits these models

Part numbers

Genuine part
35
Packs
35 02 (2-pack), 35 04 (4-pack), 35 10 (10-pack)
How often
Replace at least once a year (manufacturer owner's manual)
What is in it
single evaporative water panel (aluminum mesh, ceramic-type coating)
Size
13 x 10 x 2 in nominal (13 x 10 x 1.75 actual)

Sources

  • Which filter fits shop.aprilaire.com Maker's own page checked Oct 1, 2026
    AprilAire 35 Replacement Water Panel
  • How many storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p8 table 'UNIT WATER PANEL PART NUMBER 300 35'; maintenance steps remove and replace the single Water Panel
  • How often storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p8: 'replace the Water Panel ... at least annually with the exception of Models 400 and 400M which should be changed at least twice per heating season'
  • Model variants shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Fits '300, 350, 360, 560, 560A, 568, 600, 600A, 600M, 700, 700A, 700M, 760, 760A, and 768 Whole-House Humidifiers'
  • Size shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Nominal 13H x 10W x 2D; actual 13H x 10W x 1.75D (inches)
  • What's in it shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Materials 'Aluminum, Synthetic Fiber'; 'heavy-duty aluminum mesh frame' with 'a porous ceramic-type coating'
  • Packs shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Package Size 1-pack, 2-pack, 4-pack, 10-pack; store SKUs '35', '35 02', '35 04', '35 10'
  • Other genuine options shop.aprilaire.com Maker's own page checked Oct 1, 2026
    H635EZ1A: '4330 Scale Control Insert, 4331 Distribution Tray, and 35 Water Panel'; 'For 600, 600A, and 600M'
Show all 22 sources

Which filter fits

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    AprilAire 35 Replacement Water Panel
  2. storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p8 table: 'UNIT WATER PANEL PART NUMBER 300 35 400 45 500 10 600 35 700 35'
  3. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    AprilAire 35 Replacement Water Panel For 300, 350, 360, 560, 560A, 568, 600, 600A, 600M, 700, 700A, 700M, 760, 760A, and 768 Whole-House Humidifiers ... Compatible Models: 300, 350, 360, 560, 560A, 568, 600, 600A, 600M, 600MKZ, 600KZ, 700KZ, 700MKZ, 700, 700A, 700M, 760, 760A, 768
  4. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    INCLUDED IN THE BOX: 300 Humidifier ... Model 35 Water Panel
  5. appliancefactoryparts.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2203620A for Models 110, 112, 220, 224, 350, 360, 440, 445, 448, 558, 560, 568, 760 & 768, dealer-hosted copy (Appliance Factory Parts), PDF p20 (Models 760-768): 'Replace Water Panel evaporator annually with a new Water Panel evaporator (Stock No. 35)'
  6. appliancefactoryparts.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2203620A for Models 110, 112, 220, 224, 350, 360, 440, 445, 448, 558, 560, 568, 760 & 768, dealer-hosted copy (Appliance Factory Parts), PDF p15 (Models 350-360): 'Remove Water Panel evaporator (5) from the Scale Control Insert ... Install new Water Panel evaporator (Stock No. 35)'
  7. appliancefactoryparts.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2203620A for Models 110, 112, 220, 224, 350, 360, 440, 445, 448, 558, 560, 568, 760 & 768, dealer-hosted copy (Appliance Factory Parts), PDF p19 (Models 558-560-568): 'Inspect the Water Panel evaporator (Stock No. 35 for Model 560) and substitute a new one if necessary'
  8. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    AprilAire 35 Replacement Water Panel Humidifier Filter
  9. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Page for the 600 (per its URL): Box contents: Model 35 Water Panel

How many

  1. storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p8 table 'UNIT WATER PANEL PART NUMBER 300 35'; maintenance steps remove and replace the single Water Panel
  2. appliancefactoryparts.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2203620A for Models 110, 112, 220, 224, 350, 360, 440, 445, 448, 558, 560, 568, 760 & 768, dealer-hosted copy (Appliance Factory Parts), PDF p19 (Models 558-560-568): 'Slide the Water Panel evaporator (7) out from the plastic Scale Control Insert ... substitute a new one'
  3. storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p10: 'Replace the Water Panel (Water Panel 35 for Models 600 & 600M and Water Panel 10 for Models 500 & 500M) with a new genuine AprilAire Water Panel'
  4. storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p10 (Model 700 maintenance): 'Slide the Water Panel (F) out from the scale control insert ... Replace with a genuine AprilAire Water Panel 35'

How often

  1. storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p8: 'replace the Water Panel ... at least annually with the exception of Models 400 and 400M which should be changed at least twice per heating season'

Model variants

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Fits '300, 350, 360, 560, 560A, 568, 600, 600A, 600M, 700, 700A, 700M, 760, 760A, and 768 Whole-House Humidifiers'
  2. storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p10: 'Water Panel 35 for Models 600 & 600M and Water Panel 10 for Models 500 & 500M'
  3. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Fits '... 700, 700A, 700M, 760, 760A, and 768 Whole-House Humidifiers'

Size

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Nominal 13H x 10W x 2D; actual 13H x 10W x 1.75D (inches)

What's in it

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Materials 'Aluminum, Synthetic Fiber'; 'heavy-duty aluminum mesh frame' with 'a porous ceramic-type coating'

Packs

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Package Size 1-pack, 2-pack, 4-pack, 10-pack; store SKUs '35', '35 02', '35 04', '35 10'

Other genuine options

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    H635EZ1A: '4330 Scale Control Insert, 4331 Distribution Tray, and 35 Water Panel'; 'For 600, 600A, and 600M'
  2. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    H735EZ1A: '4236 Scale Control Insert, 4246 Distribution Tray, 35 Water Panel'; fits 700, 700A, 700M