Aprilaire 4640 Humidifier Scale Control Insert
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 its best.
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