Keystone Water Boilers ,   Model: Keystone Water		Additional Information
With an efficiency of up to 86.4%, the Keystone Water Series features cast iron sections and push nipples. The Keystone comes standard with the highly efficient Beckett AFG burner. An optional tankless heater is available for your domestic hot water needs. Efficiency: Mid-Efficiency Capacity: 84 - 105 - 140 - 126 - 175 - 210 - 168 - 245 - 280 MBH Heat Exchanger: Cast Iron Combustion: Atmospheric Venting: Vertical Vent Boiler Type: Hot Water		Brochure 240004958 - Pennco Silver Full Line 4/09 1.7 MB Installation & Operation Manual 1305007 - Keystone Water Rev. 1.0 1.1 MB Product Bulletin Pennco Keystone Boiler - Factory Standard Sizes Rev. 6/07 20.3 kb Warranty 1595016 - Keystone Water Rev. 12/06 502 kb