Hot enough for ya???

[Jaws]

Originally Posted by b_james

Without the chiller running, how cool do you keep your condo during a heat wave? If your AC can maintain a 21C temp during the hotest day of the year even with your MH lights on, There is a good chance you should be able to maintain a much cooler water temperature in your tank. Right now your cooling your tank by stealing BTUs from your AC unit as the heat rejection from your chiller is using capacity from your central AC unit therfore making you chiller work harder - vicious circle.

I've always had the air conditioner running while the chiller is running actually. I've never tried to run only one at a time. I've got 4 250W MH's over a six foot tank though so I don't think I could get away with just an air conditioner.