I was not an existing customer or City Air but when I couldn't reach my original installers I called them. To my delight they were ready to come out on the weekend and deal with my customeized climate control systems (for my studio). I had to cancel because of a medicald emergency and we bumped it to the next day. One of the City Air team showed up by noon, quickly determined the problem and completely solved things (which began with a poor original installation). They were a pleasure to deal with, always reachable by phone (or I really would get a callback within their stated 15 minutes). I have now made City Air my
go-to HVAC guys for any problem.