November 2022
6022221B - Direct Drive HVLS Fan UM
13
Introduction
NATIONAL FIRE PROTECTION ASSOCIATION STANDARD
In accordance with NFPA 13 Standard from the National Fire Prevention Association as referenced in
sections 12.1.4 and 11.1.7: High Volume Low Speed (HVLS) Fans: The installation of HVLS fans in
buildings equipped with sprinklers, including ESFR sprinklers, shall comply with the following:
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The maximum fan diameter shall be 24 feet (7.3m).
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The fan shall be approximately centered between four adjacent sprinklers.
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The vertical clearance from the fan to the sprinkler deflector shall be a minimum of 3 feet (0.9m).
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All fans shall be interlocked to shut down immediately upon receiving a water flow signal from the
alarm system in accordance with the requirements of NFPA 72-National Fire Alarm and Signaling
Code.
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