Raypak Raytherm Hydronic Hot Water Boiler- 72 HP. Model: H4-2500A-CEDRB. S/N: 9411120192. Capacity (input): 2,439,000 Btuh. Capacity (output): 2,049,180. Heating surface area: 268 sq. ft. Water MAWP: 160 psi. Maximum permissible gas supply pressure: 14 in. WC. Minimum permissible gas supply pressure for purpose of input adjustment: 7 in. WC. Manifold pressure: 4 in. WC. Number of burners: 25. Operates with water temperature as low as 105 °F without condensing. Honeywell 2 in. Gas Valve, Type: V88A1709-3, naural gas pressure: 1 psi. power supply: 24 V, 62 amps, 60 Hz. Inlets: (1) 1-1/2 in. dia. MPT (gas), (1) 3 in. dia. MPT (cold feedwater). Outlets: (1) 1-1/2 in. dia. copper tube (pressure relief), (1) 3 in. dia. MPT (hot feedwater). Overall dimensions: 82-1/2 in. L x 57 in. W x 66 in. H.