NFPA 13 and HVLS ceiling fans Industrial commercial ceiling fans for warehouses

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Two studies looked into how HVLS fans and sprinklers work together during a fire. • These studies, conducted in 2009 and 2011, found that HVLS fans do not pose a threat to sprinkler systems. • The 2009 study conducted by Schirmer Engineering, found that HVLS fans do not hinder the operation of a sprinkler system. • This was seemingly true regardless of fan placement. • However, the only condition set was that the fans must be installed in accordance with NFPA guidelines. • .. The maximum fan diameter shall be 24 ft (7.3 m). • .. The HVLS fan shall be centered approximately between four adjacent sprinklers. • .. The vertical clearance from the HVLS fan to sprinkler deflector shall be a minimum of 3 ft. • .. All HVLS fans shall be interlocked to shut down immediately upon receiving a waterflow signal from the alarm system in accordance with the requirements of NFPA 72 • ‍ • .. Provide a means of automatic shutdown for all HVLS fans. • .. Design the automaticshutdown so that power to the fan is interrupted within 90 seconds afterthe first sprinkler operates. • .. FM Approved smoke detection devices, heat detection devices, and water flow alarm devices are acceptable means to achieve automatic shutdown of fans. • .. When detectors are used, install and space them uniformly above the fan blade area. • .. Follow the recommendations in DS548,Automatic Fire Detection, and the manufacturers spacing requirements. • .. Arrange the installation of HVLS fan so that the fan support structure and the fandrive assembly do not obstruct the discharge pattern of the sprinklers. • https://ameriwind.net

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