Greenheck DC Installation, Operation And Maintenance Manual page 4

Minimum Spacing Requirements
3 FT. CLEARANCE AROUND BLADES
A
4 High Volume, Low Speed Ceiling Fans
Minimum Spacing From Center of Fan (ft.)
Fan Size (ft.) A
8 12
10 15
12 18
14 21
3 FT. CLEARANCE AROUND BLADES
B
MINIMUM 10 FT. ABOVE
B
24
30
36
42
2X FAN DIAMETER
FROM HVAC
WHEN FULL DIFFUSER OUTLET
IS BELOW HVLS FAN,
HVLS FAN MUST BE 1X FAN DIAMETER AWAY
FINISHED FLOOR
HVAC
DIFFUSER
®