i have a backup a/c that sits collecting dust waiting for the day it is needed for just such an emergency.what do you sealed guys do when AC breaks? Just lose the crop or what? Seems like it'd get hot as hell and your crop would die quick. Would definitely need some kind of light controller with high temp shut off. It's not always easy or quick to get AC repaired.
actually the biggest problem i encountered was high humidity at lights out when the a/cs shut down. dehueys being expensive items.
intersting idea, what is the heat source, what is the thermostat controlling?... you may have just saved me money i was going to buy another dehueyin my sealed room i just use a programmable thermostat with a 7 degree temp drop at lights out that keeps the dewie from working much at all during the night