22
6022221B - Direct Drive HVLS Fan UM
November 2022
Installation Considerations
BUILDING STRUCTURE
For open structure roof designs, the fan should
only be hung from either an I-Beam or angle
iron. Do not hang from purlins, posts, or a truss
structure unless all of the following apply:
z
The truss can handle the load of the fan
z
The bottom chords of the truss are larger that
5” but smaller than 10 1/2” combined.
z
The fans are installed at the strongest point
load on the truss.
If you have questions on whether or not the truss
can handle the load, you must consult a local
structural engineer.
For solid beam or laminated wood beam
mounting, use the laminated wood beam kit
available from 4FRONT.
Ensure fan blade clearance meets the
requirements shown in
Figure 1
through
Figure 5.
NOTE:
Consult a professional engineer or registered
architect for specific mounting concerns.
PLACEMENT AND SPACING
Consult your local distributor to help you plan the
most efficient installation of your fans.
Ensure you place the fan so that the fan blades
are a minimum of 10’ from any manned working
surface (floor or mezzanine).
Ensure the fan blades do not extend into the
exclusion zone.
Extensions are available if you need them. See
Figure 2
.
Avoid mounting fans directly under lights or
skylights to avoid visual strobing.
Figure 5
1/2-13UNC x 4-1/2 (x4)
1/2 dia washer (x8)
Pivot bracket
Mount tube
NLN, 1/2-13 (x4)
(Grade 5 hardware required)
Grade 5 hardware or better
TOC