In addition to DOE Efficiency legislation, HVLS fans must be in accordance to Fire code – nfpa 13. This code includes:
- Maximum fan diameter shall be 24 ft.
- Fan shall be centered between 4 sprinklers
- Vertical clearance to sprinkler deflector shall be minimum of 3 ft.
- Fans shall be interlocked to shut down upon receiving fire alarms
HVLS fans must also me in accordance of ASHRAE 55 – Comfort Cooling. ASHRAE 55 establishes methodology for quantifying the effect of air velocity on thermal comfort