330 MBH to 4,100 MBH (9.5 BHP to 120 BHP) @ up to 86% efficiency
Traditional vertically configured fire-tube design with better overall efficiency due to under-fired power burner. In addition to the simplicity of the 4-piece design, the FPH includes many advantages over other vertical configured boilers. For example, its larger water volume results in both a low pressure drop thru the unit and reduced cycling, to improve overall efficiency.