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ARDEN HILLS CITY COUNCIL WORK SESSION — NOVEMBER 18, 2019 4 Bob Bierwerth, Johnson Controls, introduced himself to the Council. He reported he has been with Johnson Controls for the past 17 years. He described the types of building solutions Johnson Controls completes within the HVAC industry. He explained Johnson Controls prided itself in providing services that were in place long-term. He noted the City's existing air conditioner was reaching its end of life. He indicated this system was too far away from the mechanical room. He then commented on the City's boiler system pointing out the deficiencies. Zac Haeg, Johnson Controls, introduced himself to the Council. He discussed a turn -key chilled water cooling solution that was being recommended for City Hall. He commented on the rebates that would be available for this type of system. He estimated the City would save 5% by replacing the heating and cooling units at the same time. He explained the new units would come with a five-year warranty. Councilmember Holden requested further information regarding the rebates that would be available to the City. Mr. Haeg discussed the standard and custom rebates that would be available to the City in further detail. Mr. Bierwerth commented on the proposed solar solution and noted the rebate would be paid back over 10 years. He recommended the Council not install solar panels until the roof on City Hall was replaced. He reported this project would be bid out through Source Well. Councilmember Scott questioned if geothermal options had been considered. Mr. Bierwerth stated this could be considered but explained the cost would be considerably higher for this type of energy use and noted the payback was roughly 40 years. Councilmember Holden commented she had a problem moving forward with this project without seeking additional bids from other qualified vendors, especially given the fact these units would cost more than $500,000. City Administrator Perrault explained the City of Grand Forks completed an HVAC improvement project through Source Well and all of the prices had been vetted. He stated if the Council would like to send this project out for bid a mechanical engineer would have to be hired to assist the City with this process. Mayor Grant agreed the proposal needed to be vetted and further bids should be requested. Councilmember Holmes asked if both the heating and cooling systems were in need of replacement. City Administrator Perrault reported both units were reaching their end of life. Council consensus was to direct staff to receive bids for the replacement of the City Hall HVAC units.