XEB Series Boiler ,   Model: XEB Additional Information Dunkirk's XEB Boiler offers the best combination of heating comfort, efficiency, reliability and affordability making it one of America's Hottest Boiler Values. With efficiency as high as 84.4%, an XEB boiler is an outstanding choice for performance and low operating cost. Efficiency: Mid-Efficiency Capacity: 42.5 - 75 - 112.5 - 150 - 187.5 - 225 MBH Heat Exchanger: Cast Iron Combustion: Fan Assist Venting: Side wall or Vertical Vent Boiler Type: Hot Water Brochure 240005048 - XEB Rev. 10/09 469 kb Installation & Operation Manual 14683001 - XEB Rev. B 2.6 MB Service & Technical Guide Dunkirk Radiation Tables 96.2 kb Service Bulletin XEB Crate Change Rev. 2/06 244.4 kb Specification Sheet 240005690 - XEB Rev. 1.0 583.2 kb Warranty 1595019 - XEB Rev. A 661.1 kb