700a, 700m 700...Aprilaire Power Humidifiers so then, where does the Model 700 come in?...how is it diff from the 700M and 700A

Friday, February 18, 2011 by Aprilaire Team
Consumer questions:

700a, 700m 700...Aprilaire Power Humidifiers so then, where does the Model 700 come in?...how is it diff from the 700M and 700A

Sears installed aprilaire 700a (as a replacement under maintenance agreement) and for the first few weeks it seemed to run constantly. Now, despite very cold outdoor temps, it hasn't come on to for a single drop of water onto the drain for about a week. Sears serviceman says thats because my house has attained sufficien t moisture. I find that hard to believe as we are back to dry skin, hair etc and a very dry atmosphere. Please advise.


Aprilaires' response:

The Models 700, 700A and 700M are the same model. 
 
The difference is with the controls.  The 700M comes with a manual humidistat that can be duct or wall mounted.  When using a manual control, you would be responsible for setting the humidity level morning and night according to the day time high and night time low temperatures.
 
The 700A Model was  a promotional unit that was introduced in October 2007 when this new style was first released.  The promotion included not only a digital automatic control that can be duct mounted only, but also included an extra water panel for the second season as well as a dvd, a weather station and a letter from our company president.  The digital control will allow you to set and forget.  With the assistance of an outdoor temperature sensor, the control will automatically adjust the indoor humidity level according to the outdoor temperature.  When the promotion ended, we dropped the letter "A" and removed the extra water panel, weather station, dvd and the letter.  The 700 and the 700A are the same unit with the same digital control.
 
Thank you for this opportunity to be of assistance.


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