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AprilAire 4640 Humidifier Scale Control Insert 10-Pack


Only $19.99 per Insert
Retail: $24.99 /ea
You Save: 20%
As low as
Retail: $24.99
You Save: 20%
Ships in 11 to 12 business days.
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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.


Customer Reviews:

Total Reviews: 16 | Average Rating: 4.7 / 5.0

Mabel Flowers2022-03-25

This humidifier wick fits my humidifier.

Collected by

Great service

Collected by
Ronald Johnson2022-03-03

The Fit was foremost !!!!

Collected by

My humidifier is older model. Hard to find filters for it.

Collected by
Christopher Lambert2022-02-11

Didnít receive my second order that I placed

Collected by
larry newman2022-01-09

The only real problem is the PRICE// The same product at two other big box stores, is much less.

Collected by
Robert Carnes2021-12-31

works as should

Collected by
Bill H2021-12-12

Quick easy to order, almost always has whats needed.

Collected by
Jeffrey Lawrence2021-11-27

The filter's work and fit well in my humidifier.

Collected by

It was easy to order just what I needed and it came right to my door.

Collected by

They seem to be working ok.

Collected by
Dianna Thompson2021-07-01


Collected by

Great product and customer service.

Collected by
Robert Gates2021-04-02

This is a great product .

Collected by
larry newman2021-01-06

Very expensive

Collected by
Joe Guzzo2020-12-28

The best price and high quality make this a no-brainer!

Collected by

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