About us Duffy's AIS Combining the efforts of Duffy’s Equipment Services, Express Commercial Services and Appliance Installation and Service, Duffy’s AIS formed in 2018. Separately, each company has been in business for more than 50 years, providing service for over 10,000 customers in central New York just within the last five years. Our seven branches throughout New York State, including Albany, Utica, Binghamton, Rochester, Buffalo, Syracuse and Watertown, offer service to all surrounding areas and frequently cross state lines into Pennsylvania, Vermont and Massachusetts.