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AprilAire · humidifier · whole house bypass

AprilAire 500 replacement filter

Use part 10. Replace at least once a year (manufacturer owner's manual).

The filter that fits

Maker lists this model

AprilAire Water Panel 10

AprilAire 10 Replacement Water Panel

Part number
10
How many
1 per unitpacks: 10 02 (2), 10 04 (4), 10 10 (10)
How often
Replace at least once a year (manufacturer owner's manual)
Size
10 x 10 x 2 in10 x 10 x 2 in nominal (9.75 x 9.5 x 1.75 actual)
Buy Water Panel 10 on AmazonManufacturer page

Opens an Amazon search for AprilAire Water Panel 10. Check the listing says 10.

See the sources

Does your exact model share this filter?

AprilAire labels several versions of the 500. Check the label on your unit.

  • 500 takes 10
  • 500A same filter
  • 500M same filter
  • 500KZ same filter
  • 500MKZ same filter

Look-alike models that take a different filter

The look-alike 600 takes panel 35 and the 400 takes panel 45.

Other genuine options from AprilAire

Variants and kits the maker sells for this model. Same fit, different media or packaging.

  • AprilAire H510EZ1A EZKit (10 panel pre-assembled with 4640 scale control insert and 4331 distribution tray)
    H510EZ1A · Find on Amazon
  • AprilAire 4792 Maintenance Kit with 10 Water Panel
    4792 · Find on Amazon

Compatible alternatives (third party claims)

These fits are claimed by the seller, not by AprilAire. We list them for completeness and label them.

  • GeneralAire GA10 Third party claim
    GeneralAire says its GA10 Vapor Pad fits AprilAire models 110, 220, 500A, 500M, 550, 550A and 558
    Seller's page

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 shop.aprilaire.com Maker's own page checked Oct 1, 2026
    AprilAire 10 Replacement Water Panel For 110, 220, 500, 500A, 500M, 550, 550A, and 558 Whole-House Humidifiers ... Compatible Models: 110, 220, 500, 500A, 500M, 500MKZ, 500KZ, 550, 550A, 558
  • How many 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'
  • 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: 'we recommend that you replace the Water Panel in your AprilAire Humidifier at least annually with the exception of Models 400 and 400M'
  • Model variants shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Compatible Models: 500, 500A, 500M; 'AprilAire recommends replacing the humidifier filter and water panel assembly once annually'
  • Size shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Materials: Aluminum, Synthetic Fiber Nominal Measurements: 10H x 10W x 2D (inches) Actual Measurements: 9.75H x 9.5W x 1.75D (inches)
  • Packs shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Package Size 1-pack, 2-pack, 4-pack, 10-pack; SKUs '10', '10 02', '10 04', '10 10'
Show all 11 sources

Which filter fits

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    AprilAire 10 Replacement Water Panel For 110, 220, 500, 500A, 500M, 550, 550A, and 558 Whole-House Humidifiers ... Compatible Models: 110, 220, 500, 500A, 500M, 500MKZ, 500KZ, 550, 550A, 558
  2. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    INCLUDED IN THE BOX: 500 Humidifier ... Model 10 Water Panel
  3. storage.googleapis.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual B2209190D (09.23), dealer-hosted copy, PDF p3: 'With bypass Models 400, 500, and 600 Series, HVAC system air is moved from the supply duct through the humidifier into the return duct'
  4. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    AprilAire 10 Replacement 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 p14: 'replace with a new Water Panel evaporator (Stock No. 10 for Model 220 and Stock No. 12 for Model 224)'
  6. appliancefactoryparts.com Maker's own page checked Oct 1, 2026
    AprilAire owner's manual DP #10003882 (5.9.00) for Models 550 and 560, dealer-hosted copy (Appliance Factory Parts), PDF p12: 'Water Panel evaporator (Stock No. 10 for Model 550 and Stock No. 35 for Model 560)'

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 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'

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: 'we recommend that you replace the Water Panel in your AprilAire Humidifier at least annually with the exception of Models 400 and 400M'

Model variants

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Compatible Models: 500, 500A, 500M; 'AprilAire recommends replacing the humidifier filter and water panel assembly once annually'

Size

  1. shop.aprilaire.com Maker's own page checked Oct 1, 2026
    Materials: Aluminum, Synthetic Fiber Nominal Measurements: 10H x 10W x 2D (inches) Actual Measurements: 9.75H x 9.5W x 1.75D (inches)

Packs

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