I have many friends with troubles I think whoever does it better know their shit. Neighbor has had nothing put troubles they had to come back in and drill the shit out of his yard again. Get something that is clean burning so don't stink up house and garage.If you have garbage people put it in. My father in law is on year ten and the system had paid for its self with out one single hick up. I know of 4 other systems in town with out a single problem heating and cooling for an average of 72 cents a day.