Could I put a chiller under my house? (in the crawl space) It is very dry under my house, would I run into any problems? Or could I put it outside? But how would I keep if from freezing in the winter?
Under the house would be OK in my opinion... I know several people who have run them outside. I never asked what they did in the wintertime; I always assumed they unhooked them and moved them indoors until it got warm again (in which case ball valves and unions would be critical unless you run flexible hose).