Can you explain the difference between the Aprilaire Model 700 and Aprilaire Model 700A?

Monday, November 7, 2011 by Aprilaire Team
Consumer question:

I am considering having our local distributor install the Aprilair 700. My understanding is that the 700A is now obsolete. Does the 700 come with the outside sensor that the 700A had. This is a feature I\'m interested in and have received conflicting information on.


Aprilaires' response:

Thank you for contacting Aprilaire.

Good News!! The current 700 is IDENTICAL to the 700A. The reason we dropped the "A" from the model number is because people were becoming confused. Everyone thought that the "A" meant automatic... which it does. But, the controller also could operate like a manual. So, since it is capable of operating both automatically and manually, we dropped the A.

This is the same humidifier, same features, but does have an updated controller. This controller now will allow you to create humidity even when the furnace is not creating heat. It will hold the blower running longer after the furnace is done creating heat. It will do this if the humidifier needs more run time.

Comments for Can you explain the difference between the Aprilaire Model 700 and Aprilaire Model 700A?

Tuesday, December 17, 2013 by Michael Fettinger:
I have asked my local HVAC to install a 700 to my new construction Bosch 4 ton geothermal forced air system, are there any special requirements needed for a geo system vs gas heat?

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