Nope I know people that have though. They are always running their chiller. Especially since they keep it in their garage in the summer they have to have a back up generator and a back up cooler in case one goes out. I have always wanted a cold water marine, I never have though I figure the cost of running a chiller during the summer would be too much. I think its too much trouble myself as seeing how a zoo down in Fresno had all of their cold-water rays die because it got too warm and their back up generator failed. So thats a big downside that I don't know if you have considered.