Unused 20 HP Water tube firebox boiler. Manufactured by Superior Boilers. Model 3-5 100. Rated 30 PSI @250F. Output 670 MBH. Input 837 MBH. 103 Sq ft Heating Surface. Webster Natural Gas burner with 5HP Blower and train. Kunkle Safety valve. 2" drain valve. Ashcroft gauges. Serial #19145. National Board #19145. Built 2019.