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 Standard for the Installation of Sprinkler Systems and also NFPA 72 National Fire Alarm and Signaling Code. From the standard and code referenced above comes a set of requirements for the installation of these fans and the fire
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