Rich Air installed multi-ductless split air conditioning unit. Peter was great. He was responsive from the first call and very flexible and accommodating re: weekend estimate appointment. We ended up letting several months pass after the initial consultation, but when we restarted the process, he was just as helpful and attentive as before. Once we determined the size of the unit needed for my place, Peter was very creative and helpful in assessing where the unit should be placed and where on the roof the external unit could (relative to co-op constraints) be placed. The actual AC unit in the apartment and the lines from the roof unit to the apartment were installed in a day, and the guys that did the work were very polite and good about cleaning up after themselves. Once everything was installed, there was Isak, who came on another day and purged the lines of air and did the initial start up. He was very good about explaining the controls and particulars of the unit and also very courteous and professional. All in all, a great experience. If you are looking to install a multi-duct AC unit (something that is common in many international countries, yet rare here in the States and NYC), these are the guys!