I have used portable A/C's and they are a last resort in my opinion. They have a feature called a compressor delay. This means that if you hook your a/c up to a thermostat and the thermostat turns the a/c on, there will be a delay (about 5 minutes) before the a/c compressor actually kicks on. the problem is this creates a lot of temperature swing and burns a lot of energy because the portable a/c will just blow air (often warm-hot) for five minutes until the compressor kicks on to provide cold air.
If at all possible try using a window a/c in the attic and vent the cold air into the grow. I just put a drip pan with a drain tube under the a/c to collect condensation and run the drip tube to a drain, possibly your bath tub/shower.
Portable a/c's are inefficient and expensive. I thought I would give you some insight before you spend the money.
Its also january, can you just pull in cold air from an outside source? that would only cost you a fan and ducting along with a passive intake.
GanjaRobPDX Reviewed by GanjaRobPDX on . portable ac unit question's ok so im about to get my ac unit so i can upgrade my lights in a closet grow...the closet is connected to my master bath so i was wondering about just having the ac unit vent to the bathroom to keep those cold drafts out ;)...(dont care about smell so much) now could i technically do this with out worrying to much about the closet not staying up to par,...my other thought is to hook the vent up to the shell around are tub. closet is 10x5 bath room is twice that pluss gets the peek in the Rating: 5