Whole-house humidifier pad replacement

Furnace-mounted humidifiers use a water panel (pad) that collects minerals over time. A scaled pad evaporates less water.

How often

Manufacturers such as Aprilaire recommend replacing the water panel at least once per heating season. Homes with hard water may need more frequent changes. Follow your humidifier's manual.

Find the right pad

The pad number is in the humidifier manual, on the unit's label, or printed on the old pad (for example Aprilaire Water Panel 35 or Honeywell HC26A1008). Pads with different dimensions will not fit the frame. See the Aprilaire 35 and Honeywell HC26A1008 replacement pages.

Examples from our catalog

• Aprilaire 35 Replacement Humidifier Water Panel by Tier1 (2-Pack) — $44.70
• Aprilaire #10 Comparable Humidifier Replacement Water Panel by Tier1 (2-Pack) — $36.37
• Aprilaire Water Panel 35 — 2 PACK — $57.31
• Aprilaire Water Panel 35 — 3 PACK — $79.67
• Aprilaire Water Panel 35 — Single — $36.09
• Honeywell HC26A1008 Replacement Humidifier Pad — 2 PACK — $59.25

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Related categories: Humidifier Pads & Wicks. General information only; follow the equipment maker's instructions and local codes. Updated 2026-11-14.