© 2018 EnergyLogic, LLC Toll Free: 800 311 8828 Fax: 615 471 5202 www.energylogic.com 8
Rev. Date 062718
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 airfl ow into the fan must be evaluated when
determining drop length requirements. In addition / EnergyLogic strongly recommends that the
fan airfoils must be a minimum of 10 feet (3.05 meters) above the fl oor. Contact EnergyLogic 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 fi xed angle mount
