Address: 1 School St suite 511, Glen Cove, NY 11542 Phone: 516-206-4984 Our Goal is to educate our customers. Friendly service and professional technicians lead our company to high level customer satisfaction. WellDuct Professional Air Duct Cleaning has been working hard to provide the best customer service to the residents regarding all types of residential and commercial HVAC system cleaning. WellDuct technicians use only HEPA certified negative air machines for indoor use and gasoline powered truck mounted machines for outdoor use.