I ran a chiller for a while. My problem was I couldn`t vent the exhaust to the outside. I have three 400 watts halides and with the room AC set at 79 and three fans...my tanks stay at 81. Good enough for me.

I would get an in-line 1-3 HP CSL chiller. They are a little noisy but its not that bad. The worst thing is the exhaust off it.
I dont know about recharging and mine was used less than a year but it never leaked.

It now sits in the garage. :roll: