Other features of this NEW boiler are: ASME and UL ULc certified designs, ability to receive and send hot water from any of three sides of the cabinet, all heating elements are serviced from one panel, all electrical is serviced from one panel, three vessel sizes of which all can fit through a standard personnel door. Powder coated cabinetry, heavy steel vessel and heads, cleanout, multiple probe ports, highly insulated thick covering on all vessel heated surfaces.