8
HVLS Fan Clearance
NOTE: Make sure the fan is not installed above any objects that produce airflow toward fan blades.
Clearances:
• 60” minimum top of fan blade to roof deck
• 24” minimum from fan blade to obstructions above or below
• 18” minimum from side of fan to any obstruction
• 144” minimum from floor to fan
Fan Located Below HVAC Discharge or Intake
A fan that is mounted below a discharge/intake diffuser must be located greater or equal to 2x the fan’s
diameter. For down discharge, the distance must be greater or equal to 1/2 the fan’s diameter.
Figure 3 - Fan Located Below HVAC Details
Fan Blade Diameter (Feet) Clearance (Feet)
612
816
10 20
12 24
14 28
16 32
18 36
20 40
22 44
24 48
DISTANCE MUST BE GREATER OR
EQUAL TO 2x THE FAN'S DIAMETER
DISCHARGE/
INTAKE DIFFUSER
GUY
WIRES
STANDARD MOUNT
(AVA ILABLE IN 12", 24"
OR 48" LENGTHS)
OPTIONAL EXTENSION
(AVAILABLE IN 24" OR 48"
LENGTHS)
2 MAX PER FAN
D
B
C
A
A. Guy wire angle distance = 45° to 60°
B. Distance from extension mount to top of fan = 21-1/2”
C. Distance from extension mount to bottom of fan = 25”
D. Distance from ceiling to fan = Minimum 60”
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