Gas and oil fire heating systems consisting of a combination furnace boiler and fuel burner and structural parts therefore, metal piping, circulating pumps and structural parts therefore, insulated hot water storage tanks and structural parts therefore, heat exchangers and structural parts therefore, and electronic controls for all of the system components, all sold as a unit

'boiler':12 'burner':15 'circul':22 'combin':10 'compon':51 'consist':7 'control':45 'electron':44 'exchang':38 'fire':4 'fuel':14 'furnac':11 'gas':1 'heat':5,37 'hot':29 'insul':28 'metal':20 'oil':3 'part':18,26,35,41 'pipe':21 'pump':23 'sold':53 'storag':31 'structur':17,25,34,40 'system':6,50 'tank':32 'therefor':19,27,36,42 'unit':56 'water':30

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