Pre-installation
PLANNING INSTALLATION
When installing the ventilation fan in a new construction site, install
the main body of the fan and duct work during the rough-in construction
of the building. The screen should be installed after the finished ceiling
is in place.
When installing in existing construction, use the dimensions to
determine required hole size for the ceiling. The screen edges should
overlap the finished ceiling.
NOTE:
If installing in existing construction, you must have access to space
above and below the installation location.
Do not install the ventilation fan in areas where the duct work will
require configurations as shown in the figure 1.
This unit will operate most quietly and efficiently when located where
the shortest possible duct run and minimum number of elbows will be
needed (Fig. 2).
4
Safety information and warnings
WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK,
OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
16. Use this unit in the manner intended by the manufacturer. If you have
any questions, please call customer service.
17. Installation work and electrical wiring must be done by a qualifed
person in accordance with all applicable codes and standards,
including fire-rated construction.
18. Sufficient air is needed for proper combustion and exhausting
of gasses through the chimney (flu) of fuel burning equipment
to prevent back drafting. Follow the heating equipment manufacturers
guideline and safety standards such as those published by the NFPA
(National Fire Protection Association) and ASHRAE (American
Society for Heating Refrigeration and Air Conditioning Engineers)
and the local building code authorities.
19. Do not install in a ceiling with insulation greater than R40.
20. Be careful not to damage existing wiring when cutting or driling into
walls or ceilings. When cutting the ceiling, do not damage electrical
wiring and other hidden utilities.
21. Switch power off at service panel and lock the service disconnecting
means to prevent power from being switched on accidentally. When
the service disconnecting means cannot be locked, securely fasten a
prominent warning device, such as a tag, to the service panel.
22. If this unit is to be installed over a tub or shower, it must be marked
as appropriate for the application. When the fan is to be installed
in the bathroom, the fan and the tub need to be more than 3' (1 m)
from each other, the fan required to install at the other side of the
tub in ceiling. Acceptable for use over a bathtub or shower when
installed in a GFCI protected branch circuit.
23. DO NOT use rigid conduit for the installation.
24. Duct work should be installed in a straight line with minimal bends.
25. Duct work size must be the same size as the discharge and should
not be reduced. Reducing the duct size may increase fan noise.
26. For CUL only: Mount with the lowest moving parts at least
8’ 2" (2.5 m) above floor or grade level.
Turning angle too sharp
Avoid duel shrink
Too many elbows
Insulation*
(place around and
over fan housing)
Fan
housing
Power cable*
Round
duct*
Round
elbow(s)*
Wall
exhaust
vent*
Seal duct
joints with tape
Seal gaps
around housing
Roof exhaust vent*
Keep duct
runs short
*Purchase separately
Elbow near the body
Minimum 18" (45.7 cm)
Fan body
Figure 1
Figure 2
It is recommended to apply sealant around fan housing to reduce building heat loss. Seal all spaces around the housing with caulking or another
similar product to avoid air loss from the building. Sheet metal ducting and the shortest duct routing possible will minimize loss of static pressure
and allow an adequate flow.
