High volume low speed (HVLS) fans are large mechanical fans that are 6 feet or wider and used in commercial and industrial settings. They are used for moving large amounts of air, and are commonly found in warehouses and similar environments. However, the fire protection requirements surrounding these fans are often overlooked or unknown completely. These fans affect the performance of the sprinkler system, and must be installed in such a manner that they meet NFPA 13 Standar