1997 Hurst Vertical Tubeless Boiler- 15 hp. Model: Cyclone (4VT-G-15-150). S/N V55-150-364. Nat'l Board Number: 4536. Steam: 150 lb. BTU/hr input (min/max): 300,000/630,000 Btu/hr. MAWP: 150 psi. Heating surface: 55 sq.ft. Capacity: 518 lb/hour steam at 212 °F. Honeywell burner control. Power flame burner: Model: JR15A-10U. S/N 119727101. Natural gas: 300 MBH to 630 MBH. Control: 115 V, 1/4 hp. Gas manifold pressure (in WC): 2.86. Water capacity at NWL: 55 gallons; water capacity flooded: 69 gallons. Overall dimensions: 102 in. L x 60 in. W x 85 in. H. (ACN230).