You will not be allowed to compare more than 4 products at a time
View compareDescription
Shipping Information
Reviews
Description
The Aprilaire 4640 is a humidifier insert that keeps your humidifier system working at its best. This product works with your 500 series model humidifier and will keep mineral scale out of the water. This will prevent buildup and other contaminants from being released into the air you breathe.
Shipping Information
Domestic Shipping
FREE Shipping over $75 - Per Order (any quantity) - Only available in the 48 Contiguous United States.
For every order below $75 Shipping charges $6.00 - Only available for the 48 Contiguous United States.
Customers in Puerto Rico, US Virgin Islands, Alaska & Hawaii will be assessed accurate shipping charges at the time of order via the United States Postal Service.
We accept payments via Shopify Payments
** Flat Rate and/or Free Shipping Promotions do not extend to items where additional shipping is posted, such as large filtration systems. **
International Shipping
International Shipping is assessed and charged carrier rates based on weight and destination in the checkout.
Reviews
Filtration for the Whole House
Our Featured Collections
Refrigerator Water Filters
Water Filters for Refrigerators People shop our selection of refrigerator water filters...
Refrigerator Water Filters
58 Items
Poseidon Filters
5 Items