I have an attached garage that is also a workshop as well as where my dogs spend most of the day (6 dogs, too many to be all in the house). I want to keep the RH below 50% and keep the temperature below 73f. I live in Raleigh NC.
The garage is 500sqft, 8ft ceilings.
I have an idylis 12000 BTU portable AC unit that has window exhaust.
It is perfectly capable of getting the garage down in the 60's (more than I need), but the RH will always been at LEAST 65% when its running.
So I got a 70 pint dehumidifier for the garage. I was thinking they'd work well together, but it seems like I HAVE to keep both of these running all day, and the coldest I can get my garage is 77f. If I turn off the dehumidifier the temperature plummest down to whatever the AC unit is set to, but then the RH goes back up to 70 in a very short amount of time.
Why am I having so much trouble with this? Why is my air getting moist again the INSTANT the dehumidifier goes off?
My AC unit is vent only, could that be forcing it to suck in humid outdoor air as make up, and if so how do I solve that??