How high can I get my humidity in my house using my Aprilaire 600 humidifier?

Friday, November 11, 2011 by Aprilaire Team
Consumer question:

I have a model 600 Aprilaire Humidifier.  When we get sick, I would like to be able to turn up the humidity. Currently, when the humidifier was turned up to 8, it would not go on. The humidistat on the Aprilaire read 52-54%. It has been in the 40s at night, 50s during the day (Minnesota). However, I would like more moisture in the air. Today I tried forcing the humidifer on by turning all the way to the right (green light is blinking). But humidity level reads only 56%. Will the computer prevent this humidifier from going over this? Or, is it possible that I am not getting good water flow through?

Aprilaires' response:

Thank you for your inquiry about you Aprilaire model 600 humidifier and control. We appreciate your input.

The Aprilaire line of humidity control are programed for limiting the humidity to 45%. This was intended to prevent the "sweating" of the windows in the colder conditions. In the instance that you turned the control all the way to the right, you place the humidifier in the test mode; which is a one time test for one minute. Please turn the control knob at or below the number 7 setting. If you require a humidity level higher than 45% there are controls that can obtain higher humidity settings. Just beware that when you see moisture on the windows or door jams that you turn the setting down.

I hope that this has given you enough information. if you have additional questions feel free to call or write.


Roy Holloway
Technical Support
Aprilaire - Division of Research Products Corporation
Hours Monday - Friday
7:00 a.m.- 5:00 p.m. CST

>>> John Albright

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