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Elk River Ice Arena <br />HVAC Study <br />R 12-1311.000 <br />The ice arena complex consists of two (2) buildings that are connected with a sheet of ice in <br />each building. The Barn was built in 1971 and the Olympic size rink building was built in 1997. <br />Both rinks are open 7 days a week for about 14 to 18 hours a day between September and <br />March. During the summer the Barn Rink is shut down while the other sheet of ice is operating <br />during the week for about 12 hours a day. Both sheets of ice are maintained between 190 F and <br />200 F and get turned down to 17 '/20 F for events and are resurfaced by electric Zambonis and <br />edgers that have rechargeable wet cell batteries. Both buildings have a dry fire protection <br />system. <br />Barn Mechanical Systems <br />This building currently does not meet code based on the current ventilation air rates and make <br />up air required for the exhaust. The rink has a Dectron dehumidification unit hung from the <br />structure and the bleachers have gas fired radiant heat controlled by a dollar validator <br />machine that the spectators can turn on by inserting dollars. The locker room areas are served <br />by a gas fired condensing furnace that cannot supply the required outside air and make up air. <br />The Zamboni room is heated by gas fired unit heaters and is not ventilated. The ice plant has an <br />electric heater in it and does not have a code required Feron evacuation system. <br />Olympic Size Rink <br />The rink is ventilated and dehumidified by a Munters Dry Cool AM30GG unit that was installed in <br />1999. This unit has a desiccant wheel that removes humidity from the rink air and is reactivated <br />by a modulating gas burner. It also has an energy recovery enthalpy wheel. The spectator <br />stands have gas fired radiant heaters that are controlled by a dollar validator machine that the <br />spectators can turn on by inserting dollars. The lobby, concession, snack, office and toilet room <br />areas are served by a gas fired rooftop unit with DX mechanical cooling. This unit brings in <br />ventilation /make -up air for the toilet exhaust and occupants. The locker room area has in floor <br />radiant heat served by high efficiency boilers that were installed in 2009. Ventilation for these <br />spaces is supplied by a gas fire 100% make -up air unit that supplies air to the space and is <br />relieved out of gooseneck ducts on the roof. The ice plant room has a gas fired unit heater and <br />a Feron evacuation system consisting of outdoor air intake exhaust fan and Feron sensor <br />controller by an outdoor air intake and exhaust fan. The rink Managers office on the upper level <br />is heated, ventilated and cooled by a fan coil unit that supplies air from the rink to the office <br />and air is reheated as required by an electric duct coil. <br />Page 1 <br />Mechanical /Electrical Consulting Engineers <br />1 750 Commerce Court ♦ White Bear Lake, MN 55110 ♦ Phone (651) 748-1100 ♦ Fax (651) 748 -9370 <br />