© 2018 MacroAir Technologies Toll Free: 866 668 3247 Fax: 909 890 2313 www.macroairfans.com 8
Rev. Date 040218
WARNING: FANS ARE NOT MEANT TO BE OPERATED IN WINDY CONDITIONS.
The minimum distance of a fan to a wall or similar obstruction should be no less than 1.5 times
the diameter of the fan.
Maximum Angle for Mount (feet)
Slope (in) 0 2/12 4/12 6/12 8/12 10/12
Roof Angle 0 9.5
o
18.4
o
26.6
o
33.7
o
39.8
o
Diameter Recommended Total Drop (Mount to Airfoil) Length (ft)
6 feet 2 2 2 3 4 4
8 feet 2 2 3 3 4 5
10 feet 2 2 3 4 5 6*
12 feet 2 2 3 5 6* 8*
*The Rapid Mount Commercial does not support this angle. Use Fixed Angle Mount for drop
lengths over 5 feet.
The drop lengths above are minimum recommendations only / based solely on roof pitch and
fan diameter. Other factors / such as allowing for proper airow into the fan must be evaluated
when determining drop length requirements. In addition / MacroAir strongly recommends that
the fan airfoils must be a minimum of 10 feet (3.05 meters) above the oor. Contact MacroAir for
assistance with fan placement and drop length selection (contact information can be found on
page 69).
The table below shows the clearance
needed from the fan to obstructions such
as lighting / conduit / etc.
Minimum Clearance (Horizontal / Vertical inches):
Airfoil / Drop Length (ft) 1 2 3 4 5 6* 7* 8* 9* 10*
6 feet 7 / 7 7 / 7 7 / 7 8 / 8 9 / 8 8 / 7 9 / 8 10 / 8 12 / 9 14 / 9
8 feet 7 / 7 7 / 7 7 / 8 8 / 8 9 / 9 8 / 8 9 / 8 10 / 9 12 / 10 14 / 10
10 feet 7 / 7 7 / 8 7 / 8 8 / 9 9 / 10 8 / 9 9 / 9 10 / 10 12 / 11 14 / 11
12 feet 7 / 8 7 / 8 7 / 9 8 / 10 9 / 11 8 / 10 9 / 10 10 / 11 12 / 12 14 / 13
Fan Placement & Clearance
*Drop Lengths over 5 feet require the xed angle mount
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