I have a 75 gallon currently running in my garage. I am going to add a 2nd frag tank in the next couple of weeks. I skipped on the chiller. Main reason is the cost, noise and high energy consumption. I have my furnace in the garage so for $300, I got a HVAC guy to add a vent into my garage. So now everytime the heater or AC runs, it cools/heats the garage also.