© 2015 MacroAir Technologies Toll Free: 866 668 3247 Fax: 909 890 2313 www.macroairfans.com 7
Rev. Date 090415
Fan Clearance - Universal Mount
WARNING: FANS ARE NOT MEANT TO BE OPERATED IN WINDY CONDITIONS.
The Universal Mount can be used in any application but must always be used in windy
conditions, applications where wind may sometimes be present or where the total clearance
between the mount and the airfoils is greater than 10 feet. 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
8 feet
3
3
3
3
3
4
10 feet
3
3
3
3
4
5
12 feet
3
3
3
4
5
6
14 feet
3
3
3
4
6
7
16 feet
3
3
4
5
6
8
18 feet
3
3
4
6
7
9
20 feet
3
3
4
6
8
10
24 feet
3
4
6
8
10
12
The drop lengths above are minimum recommendations only, based solely on roof pitch and fan
diameter. Other factors, such as allowing for proper airflow 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 floor. Contact Technical Support for
assistance with fan placement and drop length selection (technical support contact information
can be found on page 50).
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
1
2
3
4
5
6
7
8
9
10
11
12
8 feet
2 / 3
3 / 3
3 / 3
3 / 3
3 / 3
3 / 3
3 / 3
3 / 3
3 / 3
3 / 3
3 / 4
4 / 4
10 feet
2 / 3
3 / 3
3 / 4
3 / 4
3 / 4
3 / 4
3 / 4
3 / 4
3 / 4
3 / 4
3 / 4
4.4
12 feet
2 / 4
3 / 4
3 / 4
3 / 4
3 / 4
3 / 4
3 / 5
3 / 5
3 / 5
3 / 5
3 / 5
4 / 5
14 feet
2 / 5
3 / 5
3 / 5
3 / 5
3 / 5
3 / 5
3 / 5
3 / 6
3 / 6
3 / 6
3 / 6
4 / 6
16 feet
2 / 6
3 / 6
3 / 6
3 / 6
3 / 7
3 / 7
3 / 7
3 / 7
3 / 7
3 / 7
3 / 7
4 / 7
18 feet
2 / 8
3 / 8
3 / 8
3 / 8
3 / 8
3 / 8
3 / 8
3 / 8
3 / 9
3 / 9
3 / 9
4 / 9
20 feet
2 / 9
3 / 10
3 / 11
3 / 11
3 / 11
3 / 11
3 / 11
3 / 11
3 / 11
3 / 11
3 / 11
4 / 11
24 feet
2 / 14
3 / 15
3 / 15
3 / 15
3 / 15
3 / 15
3 / 16
3 / 16
3 / 16
3 / 16
3 / 16
4 / 16
