FBN2001 Lochinvar Crest Condensing Boiler Model FBN2001 1999000 Btu/Hr Maximum Input 1923000 Btu/Hr Maximum Output 92% Thermal Effciency Natural Gas Modulating Burner w/ 20:1 Turndown 4 Inch Water Connection 9 Inch Vent Standard Features: Direct Spark Ignition Low NOx Operation Sealed Combustion Low Gas Pressure Operation Vertical or Horizontal Venting Category IV Venting up to 100 Feet ASME "H" Stamped Heat Exchanger 316L Stainless Steel Fire Tubes 160 PSI Working Pressure Adjustable High Limit

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