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Lochinvar® NOBLE™ Condensing Gas Combination Boiler, High Efficiency, Series: NKC, Natural Gas, 11000 to 110000 Btu/hr Input, 1 in NPT Water, Direct Spark Ignition, 102000 Btu/hr DOE, 95 % AFUE, Direct Vent, 3 in Vent, Wall Mount, Ultra Low NOx: No, 17-1/4 in W x 32-1/2 in H