Description Overview 475 hp boiler Single pass Immersion type Firetube boiler Model 475hp-sh-ln390 Specifications Rated for 150 psi steam pressure Designed for natural gas 19,976,000 input btu 15,901,000 btu out Approximately 16,000# steam/hr Condition Excellent condition Included 25 hp electric burner, 460v Spare burner assembly