Mechanical Telephone: (617) 373-4885 The Mechanical Shop is responsible for supplying steam and hot water to over 5 million square feet of occupied space. The main source of steam is the largest low-pressure steam plant in New England. The plant has five boilers that generate 4,200 boiler horsepower at 15 PSI. The duties of the Mechanical Shop include maintenance and repair of pumps, burners, food service equipment, radiator controls and steam traps.