This is the first summer that I've been running two 250w metal hallides and four VHOs. During the summer my house reaches about 77F during the peak of day. I don't turn on my VHOs until about 4:00 PM and my MHs about an hour later after the house reaches 72F again. I have to turn on my canopy fans about noon to get a good start on the mid day heat. Everythings on timers. I'm keeping the tank at about 81F pretty well, but that's too close to what I consider the 'upper limit'.
I want to add another fan to the sump. I know I can drop the temperature to about 78F easily by doing so, but if I relly on a normal timer I might have temperature drops on days when the weather is cooler (rain). I want to control the fan with some type of controller. The key here is cost! Has anyone ever fooled with a home air conditioner controller to do this? Does anyone have any other ideas?
Wind me up!