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

Thursday, October 21, 2010 by Aprilaire Team
Consumer question submitted:

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


Aprilaires' response:

The model 700 is currently offered in two versions a 700M and also a 700. The difference between these two versions of humidifiers in that the 700M version is equipped with a non-digital manual control that can be duct mounted or mounted in the living space. The version 700 comes equipped with an automatic digital humidistat that can only be mounted in the return duct of the heating and cooling system.

The 700 version utilizes the automatic control allowing you to set it once at the beginning of the season and not have to typically adjust it rest of the humidifying season. This particular version utilizes an outdoor temperature sensor that will take approximately 400,000 temperature readings a day to automatically adjust the indoor humidity setting based on the outside temperature.

The 700M version utilizes the manual non-digital humidistat that requires you to adjust setting anytime there is a noticeable outdoor temperature change. The advantage to this particular version is that the control can be mounted in the living space if desired by the customer.

The 700A version that is referenced is an obsolete version that was replaced with the 700 version. The A version utilized the same control as the 700 version but came equipped with extra pieces that are no longer required for the application. These two versions are identical in operation and performance but has a variety of components removed from the packaging as they were not required or necessary.

If there are any further questions regarding the Aprilaire product please contact us at your earliest convenience. We would be happy to further assist you with any questions relating to our entire product line.


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

Sunday, November 14, 2010 by Steve:
I recently went from an old 760 to the 700m model, with the non-digital humidistat. How can I run a test to ensure that the humidifer works? There's no test setting for the dial on the humidistat.
Sunday, November 14, 2010 by Steve:
I recently replaced an old 760 model with the new 700m. How can I test the humidifier to ensure that it's working properly and getting power? I connected the new humidistat, but there's no test mode on it.
Wednesday, November 17, 2010 by Steve:
I would like to purchase a 700 or 700A through Amazon . . .the 700A is ~$280, and the 700 is ~$350, so is there any reason why I should not buy the older 700A model?
Thursday, November 18, 2010 by Aras Jonikas:
Other than cosmetic appearance, is there any other phisical difference between 700 and 700a? What is included in the 700a package that is not in the 700?
Friday, February 4, 2011 by m.c. fittipaldi:
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.
Saturday, February 11, 2012 by John Lenox:
Hello- So sorry it's still not clear to me which one (700 or /M) is recommended to replace my current model 760. Please enlighten me if I misunderstood.
John Lenox
Friday, January 18, 2013 by Carl:
I want to replace my 760 humidifier! Which one do I get, the 700a or the 700m? The humidistat is now mounted in the return duct!

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