Founded in 1932, Emerson-Swan is a subsidiary of The Swan Group, headquartered in Boston, and is a manufacturer s representative of plumbing, heating and heating, ventilation and air conditioning products in the United States. The company represents a variety of manufacturers in Massachusetts, Rhode Island, Connecticut, Maine, New Hampshire, Vermont, Pennsylvania, West Virginia, Ohio and New York. Emerson-Swan s product lines include Alfa Laval, Baltimore Aircoil, Cemline, Heat-Timer, Keckley and Twin City Hose. The company serves wholesalers, contractors, engineers, architects, industrial accounts and end users, through a defined set of focused sales and marketing structures. It is a member of the American Supply Association and the American Society of Heating, Refrigerating & Air Conditioning Engineers. Emerson-Swan is headquartered in Randolph, Mass.