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Arden Hills City Hall Mechanical Assessment 2020 <br /> Only one hot water unit heater was observed, in the Basement mechanical room. The unit was in poor <br /> condition with a dirty coil and rust beginning to form on the exterior. The unit was running at the time <br /> of the site observation indicating some issue with the controls. Given the condition,the unit heater is at <br /> the end of its expected life. <br /> Several segments of hot water fin tube radiation were observed. All appeared to be in good condition <br /> with ample life remaining. <br /> Conclusions and General Recommendations <br /> 1. The water heater is at the end of its expected life and should be replaced. <br /> 2. The boilers are near the end of their expected life and should be replaced, especially given the <br /> recent increase in maintenance& repairs required. The heating water pumps should also be <br /> replaced as (1) is near the end of its expected life. <br /> 3. The air-cooled condensing units are near the end of their expected life and should be replaced, <br /> especially given the recent increase in maintenance& repairs required. <br /> 4. The existing air handling units were generally in good condition with some expected life <br /> remaining. The cooling coils& refrigerant piping should be replaced if the condensing units are <br /> replaced since the new units would be running on a different refrigerant. <br /> 5. The general ventilation fans, VAV boxes, cabinet unit heaters&fin tube were all in good <br /> condition with some expected life remaining. <br /> 6. The unit heater in the mechanical room is at the end of its expected life and should be replaced. <br /> 7. The damaged lining in the return duct for AHU-3 should be replaced. <br /> 9 1 P a g e <br />