Empire II Water Series Boiler ,   Model: EW Additional Information Dunkirk's Empire II Water (EW) 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 86.5%, an Empire II Water boiler is an outstanding choice for performance and low operating cost. Efficiency: Mid-Efficiency Capacity: 91 - 105 - 140 - 126 - 175 - 210 - 168 - 245 - 280 MBH Heat Exchanger: Cast Iron Combustion: Atmospheric Venting: Vertical Vent Boiler Type: Hot Water Brochure 240005058 - EW Rev. 10/08B 707.7 kb Installation & Operation Manual 14683006 - EW Rev. 1.0 2.5 MB Other 1003041 - EW Wiring Addendum 3/04 20.1 kb Service & Technical Guide Dunkirk Radiation Tables 96.2 kb Service Bulletin EW Crate Change Rev. 2/06 244.4 kb Specification Sheet 240005691 - EW Rev. 1.0 514 kb Warranty 1595019 - EW Rev. A 661.1 kb