The manufacturer told me this would work with an Aprilaire 500 humidifier, and it does. The thing is it's 1 1/2" thick and to fit the Aprilaire 500 perfectly it should be 1 3/4" thick. Anyhow, I'm now using an Aprilaire #10 which is 1 3/4" thick.
Verified purchase: Yes | Condition: New
Fantastic price! We'll have to see how these stack up over the long term.
Verified purchase: Yes | Condition: New
Convenient online purchase
Verified purchase: Yes | Condition: Pre-owned
Water pad works like it's supposed to.
Verified purchase: Yes | Condition: New
Working well in my older humidifier.
Verified purchase: Yes | Condition: New
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