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II <br /> t • <br /> i <br /> The wall and roof designs need to provide for continuous layers of insulation without thermal breaks , <br /> particularly by metal framing . Complete air and vapor barriers are mandatory to minimize moisture build <br /> up within wall and roof frame assemblies . Given the amount of moisture , no organic materials should be <br /> used in these assemblies that will support mold growth or insect infestation . These materials include <br /> wood , cellulose , paper faced gypsum , plant and animal fibers . <br /> i <br /> The perimeter slab edge needs rigid insulation installed on the exterior surface , also without thermal j <br /> breaks . CC <br /> To avoid window moisture condensation problems , any designed natatorium windows and skylights will <br /> have to be double glazed *at a minimum . <br /> 2 . Pool covers <br /> Volume X , mandates that pool covers be included for all heated pools designed for this facility. The U . S . <br /> Department of Energy states that up to 95 % of. the heat loss from swimming pools results from <br /> evaporation of moisture off the surface water . Consequently covering a pool when it is not in use is the <br /> single, most effective way to save money on : <br /> • Water purchase , heating and chemical costs 3 <br /> • Space heating , cooling and dehumidification costs , <br /> • Building moisture maintenance and facility replacement costs . <br /> Pool cover savings are significant. The unoccupied time period expected for this pool is approximately <br /> 3 ,400 hours per year, assuming the pool is closed from 9 PM to 6 AM daily and on eight holidays per <br /> year . <br /> For a 25 meter by 25 yard pool , the Energy Smart Pools software estimates a pool cover will save the <br /> new aquatics center $ 5 , 700 per year on energy and water costs with an efficient heat pump water <br /> heater . <br /> • Covers must be used on a daily basis to produce savings . <br /> • Because manually operated covers for large commercial pools are labor intensive , the tendency is <br /> for pool operators nbt to use them : ' <br /> ^:« Motor driven , automatic covers cost significantly more money to install . Manufacturer choices <br /> appear to be limited . This evaluation identified: only one manufacturer that makes automatic <br /> pool covers for commercial sized , swimming pools . <br /> • Pool design layouts should be developed to accommodate the efficient daily use of large cover <br /> blankets . Design guidelines include pool . shape , minimizing the number of . permanent <br /> obstructions in the pool (water features , ladders , ramps , etc . ) , provisions for wall - mounting of <br /> cover rollers (or storage space for movable roller catts ) and competitive swim lane direction <br /> layout . <br /> 3. Daylighting CC <br /> With regards to indoor swimming pools , daylighting with windows , clearstories and .skylights must be <br /> carefully designed to minimize visual glare. spots on .the . pool water surface for lifeguards , swimmers -and . <br /> spectators . Glare control is more stringent for competitive pools versus recreational pools . An excellent <br /> article on this subject ; * entitled ` Getting ' Pool Light Right' is available on the Counsilmari/Hunsaker <br /> website ; ' www . chah2o . cam /publications/poolight2'. htmi'. <br />