Agenda Packets - 1997/06/09 - Laserfiche WebLink

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Item No. /1/-1- fir Staff Report No. q7-2/LSC., Meeting Date: June 9, 1997 • Type of Business: Council Business WK: Work Session;PH:Public Hearing; CA: Consent Agenda; CB: Council Business City of Mounds View Staff Report To: Honorable Mayor and City Council From: Michael Ulrich, Director of Public Works Item Title/Subject: Discussion of the City Hall HVAC system Date of Report: June 5, 1997 At the June 2, 1997 work session, staff presented Council with the state of the current air conditioning units in City Hall and introduced representatives from NorAm Energy Management.NorAm presented and explained their program and a preliminary estimate for the replacement of the entire HVAC system. While this estimated cost was considerably higher than staff anticipated, it was merely a very conservative preliminary estimated based on a limited study. Since the Monday meeting yet another AC unit has failed. This is the unit that services the main office area of finance, and planning. Fans were purchased to try and move the cool air from other parts of the building into this area. • There are four options of varying efficiencies and improvements available to the City for the HVAC systems. It must be noted that all of these are very rough estimates, not obtained through any type of detailed engineering studies. The first and most economical option would be to replace only the air conditioning units on the roof that have failed, with new units. Time expected to complete this replacement is approximately 2 to 4 weeks. Estimated expense $15,000.00 to $20,000.00 The second option would be to replace all of the air conditioning units on the roof with new units. This would improve the efficiency of the building's cooling capacity for the average three (3) months of required cooling. Staff was informed that replacing these units would take from three (3) to six (6) weeks. The approximate cost for this option could be in a range from $40,000.00 to $60,000.00. The next option would provide replacing the old AC roof top units with dual (heating and cooling) units and removing the boiler system. This option would require additional labor and engineering to remove the heating coils from the duct work. Estimated cost: $80,000.00 to $150,000.00. This option would improve both the efficiencies of the heating and cooling needs in the building. It would provide for less individually controlled offices that are located around the perimeter of the building. •