Cosmopolitan has installed our AC and Furnace 3 years ago and does the maintenance every year. Scheduling maintenance is easy; Ather has come two years in a row to provide the maintenance. He is diligent and patient in explaining the steps taken to check everything. This year, I requested a look at the humidifier control as well and he adjusted it accordingly, so resolved my immediate concern. I'm very satisfied with the whole process, the people I interacted with were very pleasant and always provided recommendations on how best to take care of the HVAC system.