This very expensive system installed by Champion three years ago has already required two visits by repair technitions. Seems like I can only expect to be spending $300 to $500 a year just in maintaining this very badly designed system. I do not know if the new AC systems are just designed badly or if you installed a cheap system. All I know is that I paid for a top of the line system and what I received was a system which will fail two or three times a year.