Agenda Packets - 1998/05/11 - Laserfiche WebLink

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May 5, 1998 WA MY. Chuck Whiting Continuum City Administrator ARCHITECTURAL DESIGN City of Mounds View PROJECT MANAGEMENT Mounds View,Minnesota CONSTRUCTION SERVICES MASTER PLANNING RE: Mounds View Community Center INTERIOR DESIGN Bel-Rae Ballroom Renovations HVAC Concerns Project #90634,Phase 2 FAX TRANSMITTAL Dear Chuck: As a follow-up to the City Council Work Session,May 4, 1998 and the job site meeting of April 28, 1998 with regards to the HVAC system at the proposed Mounds View Community Center,the following should be noted: The gas fired rooftop HVAC units are very typical for installations of this type. They provide ducted heat and cooled air to the areas that they serve.Each unit typically serves a zone within the building.A thermostat controls each building zone. The overall system is generally efficient and economical. The original program dated May 6, 1996 and following revisions noted that rooftop units would be provided. In subsequent meetings with CHS—May 9 1997,Community Education—December 17, 1997,City—July 1, 1997,August 28, 1997 and others,the HVAC systems were discussed along with the design documents. In the CHS and Community Education areas the exterior rooms would be located on separate zones,with the interior rooms on separate zones. This setup was discussed and approved. The remaining major areas of the facility;Multi-Purpose area,Lounge,Teen Center and Gym would each receive its own rooftop HVAC unit. Each area would be controlled by separate thermostats.Again,this setup was discussed and approved. Some temperature differential may be created within each zone,depending on each room occupancy and use. At one point during the Design Development phase,the Community Education area had a boiler system and variable air boxes indicated. This was removed during the Design Development cost review because the project was over budget. This was reviewed and approved by Community Education. At the job site meeting on April 28, 1998,the controls for the systems as indicated were questioned by the mechanical contractor. This was the result of some concerns expressed about the Phase 1 project. Additional controls can be added to the systems by installing volume damper boxes and thermostats to individual rooms with the HVAC zoned areas. This would allow the individual rooms to control the air volume it receives from the HVAC unit. This would reduce the temperature differential created in the main zone areas. The approximate cost for the volume dampers is about$2-3,000. If volume dampers were to be installed in the CHS Daycare, Community Education,Teen Center and the Multi-Purpose Room, approximately 15-18 units may be required. 381 East Kellogg Blvd. St.Paul.Minnesota 55101 Fax 612-223-5092 612-227-0644 Wisconsin Office 2125 Altoona Avenue Eau Claire,Wisconsin 54701 MN and WI 1-800-845-0784