I contacted Cool Air USA after my unit stopped working during the hottest night in Florida. They promised to come within an hour and they did. The guy was kind, knowledgeable, sociable and thorough with his work? explaining why my cooling unit wasn?t working and how he would be able to fix it. In less than an hour, my house became cool once more. I couldn?t be happier with this. Highly recommend Cool Air USA. Would use them again and I am planning to do so when I upgrade my system to a more efficient one.