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Give it purpose - fill it with water filters, air filters, refrigerator filters, and more.
The Aprilaire 4181 fits the following humidifier models:
The Aprilaire 4181 Humidifier Float Chamber is a u-shaped component that encases the water panel and guides built-up mineral desposits back into the water panel.
The Aprilaire 4181 specifications:
Replace the Aprilaire 4181 Humidifier Float Chamber as needed.