The RS Mk.11 gas boilers are cast iron construction and are developed and manufactured by Sime to meet the demands of heating installations for the commercial and industrial sector. The RS Mk.11 line of boilers is atmospheric gas with outputs ranging from 129 to 279 kW. Boilers are supplied fully assembled and are suitable for operating pressures up to 5 bars. Boilers are supplied complete with thermal insulation, casing, integrated atmospheric gas burner and train, electrical control panel incorporating control thermostat, high limit thermostat, boiler temperature gauge and burner stop start switch. The Sime RS Mk. 11 range has a 3 year warranty covering the cast iron heat exchanger. This guarantee covers replacement of any faulty section free of charge, including labour should a material defect occur.