Gary said,
There are a bunch of refs out there saying that AC powered attic vents don't payoff.
I think of my AC powered attic fan kinda like a very low cost heat pump.
It started up around noon today, but we never turned on the AC until about 3 PM.
By 6:30 PM it was cool enough to shut off the Sanyos again.
Without the attic fan, the house heats up earlier and stays hotter longer.
When we did turn the Sanyos on this afternoon, the house cooled down a couple of degrees,
very quickly..
Right now, 7:45 PM, the ceilings are at 76.6F and the attic sensor is at
93.1F.
It's 76 indoors and 71.6 outdoors (and dropping fast)..
In my case, I don't mind paying a few extra bucks for power,
when it allows us to enjoy more hours of mild summer weather.
Not really expecting the fan to pay for itself in 10 years..