Teledyne Laars Mighty Therm Hot Water Boiler- 12 HP. Model: VW0400CP1CBAEX. S/N: A94CD0072. Low pressure boiler. Capacity: 31 gpm. Input: 400,000 Btuh (320,000 Btuh indoor). Output: 324,000 Btuh. Maximum relief valve capacity: 324 lbs/hr. Maximum orifice size: 54 dms. Heating surface area: 32.9 sq. ft. Natural gas or propane combustion. Ideal for hydronic heating in commercial and industrial environments. Stainless steel burners with 3/4 in. dia. glass-lined cast iron steam headers. Inlets: (1) 1-1/2 in. dia. NPT (male). Outlets: (1) 3/4 in. dia. NPT (male, pressure relief), (1) 1-1/2 in. dia. NPT (male), (1) 8 in. dia. duct (combustion air). Overall dimensions: 48 in. L x 26-1/2 in. W x 68 in. H.