Empire II Steam Series Boiler ,   Model: ESC Additional Information The Empire Steam ESC oil-fired steam boiler now offers *improved efficiency and reliability with a re-designed heat exchanger and protective heat shield, as well as an electronic low water cut-off. *ESC-365S and ESC-4100S capacities are now EnergyStar rated. Efficiency: Energy Star Rated Capacity: 65 - 100 - 125 - 150 - 175 - 200 - 225 - 275 MBH Heat Exchanger: Cast Iron Combustion: Atmospheric Venting: Vertical Vent Boiler Type: Steam Brochure 240005057 - ESC Rev. 9/09 695.3 kb Installation & Operation Manual 240007514 - ESC Rev. D 2.8 MB Product Bulletin ESC Product Bulletin 9/19/08 75.8 kb Service & Technical Guide Dunkirk Radiation Tables 96.2 kb Warranty 1595018 - ESC Rev. 2.0 247.8 kb