On Jul 21, 11:22*am, Limp Arbor wrote:
I have a two-story house that is currently being blasted by the heat
dome in the NE. *What I have been doing the past few days is switching
the fan on my thermostat from AUTO to ON in the evening so the
upstairs won't be so hot then turning it back to AUTO before I go to
bed. *I only have one thermostat downstairs so it is always cooler
downstairs. *The attic fan that blows out the gable vent is running
almost constantly.

I have already blocked all the return vents downstairs and closed all
of the downstairs registers and it has dramatically improved the temp
upstairs but it still needs work. *I would like to avoid redoing the
ductwork and making the 2nd floor a separate zone.

I was hoping I could find a thermostat that would kick on the fan say
20 minutes out of every hour regardless of the call for the
compressor.

Any ideas?

You might want to consider an Insteon thermostat. You can control it
from a computer, or other Insteon accessories and tell it to do pretty
much anything. I suppose the minimum to get this going would be a
timer device and the thermostat.

http://www.smarthome.com/2491T1/Vens...ammable/p.aspx
($160)
http://www.smarthome.com/2456S3T/Tim...n-Timer/p.aspx
($50)

But you should check with the Insteon techies to make sure it can
actually be configured to do what you want (whether the timer device
can control only the fan). There's a free chat page on their
website. You should also browse through their other thermostat
products as I wouldn't be surprised if they have some functionality on
their other thermostats that might suit your needs better.

John