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Aprilaire 4640 Humidifier Scale Control Insert 10-Pack


Aprilaire 4640 Humidifier Scale Control Insert
Only $16.95 per Insert
$16.95 /ea
Retail: $19.99 /ea
You Save: 15%
As low as
Retail: $19.99
You Save: 15%

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Product Information

The Aprilaire 4640 is the correct replacement for the following humidifiers:

  • Aprilaire 500
  • Aprilaire 500A
  • Aprilaire 500M

The Aprilaire 4640 Humidifier Scale Control Insert is for use in your 500 series model humidifier. This Aprilaire humidifier scale control is a U-shaped piece that encases your humidifiers water panel evaporator.

The Aprilaire 4640 Specifications:

  • Contains 1 humidifier scale control insert
  • Works with your 500 series model humidifier
  • Item Weight: 4.8 ounces

The Aprilaire humidifier scale control will direct mineral build up back into your humidifiers evaporative pad, keeping it out of your clean, humidified air. This humidifier scale control is a key feature to keeping your Aprilaire 500 series model humidifier working at peak performance.


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