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Arden Hills City Hall Mechanical Assessment 2020 <br /> Hydronic Heating Systems <br /> The building has a hydronic hot water heating system. Heating hot water is provided by two Slant Fin <br /> Caravan GG 350 MBH boilers. The boilers are gas fired and are original to the building. Their estimated <br /> combustion efficiency is about 83%. There was some rust forming on the burners and several repairs <br /> done over the past few years. These cast iron boilers can have a 30-35-year life. But given the age, <br /> appearance and number of repairs,they are probably near the end of their expected life. <br /> y! y , <br /> '' i r GlYGO! f <br /> vco� y <br /> The hydronic heating hot water system has (2) Bell &Gossett Series 60 circulation pumps. Pump#1 <br /> appears to be original to the building while Pump#2 appears to have been replaced in 2015. Pump#1 <br /> was in fair condition and near the end of life. Pump#2 is in good condition with around 10 years of <br /> expected life remaining. <br /> r . <br /> r_ <br /> I <br /> 4 Page <br />