page 2
Mounting the Fan
Sizing Requirements
See sizing chart to assure that you select the correct number
of fans for your situation. Some attics have walled off or
chambered areas that will require additional fans to properly
vent the space.
If you have any questions or concerns please feel free to call
our customer service specialists at
866-446-0966.
For crawlspace applications use 1 fan for every
1200 sq. ft. based on a 2.5 ft. height.
Determine your mounting application
One of the great features about the All Purpose Ventilator is the many mounting options.
Gable Vent
Static or Turbine Vent
Crawlspace Vent
If you have a tile roof and do not want
to cut into the tiles, use the gable vent
for mounting the fan.
Rather than removing the static or
turbine vent, simply use the same
opening.
If your crawlspace has too much moisture,
increase the airflow and reduce moisture
by installing near a vent opening.
Important Tip:
To maximize airflow to the attic close off any unused
static vents. Use tar paper and staples as shown.
Before you begin:
Loosen (but do not remove) the 8 nuts
(fig1)
on the 4 mounting brackets
(fig 2)
so they can slide freely.
And remember:
Always note the orientation of the fan’s
air flow relative to the vent opening.
4 mounting brackets
fig 2
fig 1
Loosen
1 Fan
1 Fan
2 Fans
2 Fans
2 Fans
1 Fan
2 Fans
3 Fans
4 Fans
4 Fans
2 Fans
3 Fans
4 Fans
5 Fans
6 Fans
How Many Fans Do I Need?
Low Slope
Up to 4/12
Medium Slope
5/12 - 8/12
High Slope
9/12 - 12/12
Attic Size
total sq. ft.
800
sq.ft.
1200
sq.ft.
1600
sq.ft.
2000
sq.ft.
2400
sq.ft.
