Mechanical engineers will use the heat load information—together with the thermal characteristics of the electrical room envelope—to establish a cooling load. This cooling load will be used to size the selected cooling system. The cooling system selection is based on the geographic location of the building and the maximum inside and outside air (OA) temperatures. If the building is located in a moderately cool and dry climate, OA ventilation may suffice. However, if the location is in a hot and/or humid climate, mechanical cooling will be needed.
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