Lochinvar® SOLUTION™ Gas Boiler, Series: CBL, Liquid Propane, 215000 Btu/hr Input, 1-1/2 in NPT Water, Intermittent Electronic Ignition, 178000 Btu/hr DOE, 84% AFUE, 7 in Vent Size, Ultra Low NOx: No, 26-1/2 in W x 21-1/2 in D x 29-1/2 in H, Commercial/Residential/Dual: Residential, Domestic