Comments on: New Research Facility to Test Home Energy Improvements https://blog.energyresearch.ucf.edu/2011/01/new-research-facility-to-test-home-energy-improvements/ Energy News from FSEC®, Florida's Premier Energy Research Center, at the University of Central Florida Thu, 14 Apr 2011 12:26:15 +0000 hourly 1 https://wordpress.org/?v=6.8.2 By: Sherri Shields https://blog.energyresearch.ucf.edu/2011/01/new-research-facility-to-test-home-energy-improvements/comment-page-1/#comment-200 Thu, 14 Apr 2011 12:26:15 +0000 https://blog.energyresearch.ucf.edu/?p=1288#comment-200 Mr. Roberts:
According to Danny Parker, author of the publication you refer to, in order to do what you want to do (drying the attic with sealed attic construction) you would need a special controller, which is not on the market.

Essentially, at the Nightcool facility, we ventilate the attic when the attic dew point is higher than the outdoor dew point. (Can’t use relative humidity; must use dewpoint). We use a datalogger to make the decision to vent or not vent the attic every five minutes.

* If attic dewpoint is > outdoor dewpoint, then turn on vent fan
* Otherwise don’t vent

This could be done with two reliable hygrometers (we use Vaisala humidity transmitters) and with a microcontroller and a D.C. powered attic vent fan.

It doesn’t exist, but it could exist and someone with electronics skills could accomplish this.

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