We got an el series furnace installed by Cosmopoliten about 6 years ago. it was a good experience, salesperson explaied everything to us and installed accordig to our home requirements thats why furnce worked great i later on got furnace maintenance bt since the installation, never faced any trouble. this year i tried their services for my Air conditioner Maintenance. they sent technician mahfooz and he was great. i will get my Air conditioning maintained again in future by Cosmopolitan.