250 HP, Superior Boiler Works Aztec Boiler-Burner Unit 5-X-1276 Steam Boiler, 150 PSI, 1991 – with DA Feed Tank – Heating surface: 1276 square feet – Shell thickness: 1/2 inch – Head thickness: 3/4 inch – Maximum steam working pressure: 150 PSI – Minimum valve capacity: 10208 pounds per hour (BTU/HR) Includes DA feed tank: – 50 PSI at 380F – Maximum allowable working pressure: 32F at 50 PSI – Manufactured 2008