NuTone QTXEN - Manual (Page 8)

Everything you need to know about home ventilation.
What is a sone, and how is
it measured?
A sone is a measurement of sound in
terms of comfortable hearing level
for an average listener. The lower
the sone value, the more comfortable
the listening environment. Sones are
not decibels or volume, but rather
how sound is “sensed.” One sone is
the equivalent of a quiet refrigerator.
What does CFM mean?
CFM is the acronym for Cubic Feet
per Minute—the measure of air
volume moved by the fan blower.
Choose a fan with a CFM rating
appropriate for your room size to
ensure adequate ventilation.
What is continuous ventilation?
Continuous ventilation provides today’s
airtight homes with a relatively
constant and controlled lower level of
ventilation. NuTone’s extremely quiet
and efficient Ultra Silent
™ Series is
ideally suited for these applications.
Can I mount NuTone fans above
my tub and shower?
Most NuTone fans are rated for
use over a shower or bathtub with
a GFCI (Ground Fault Circuit
Interrupter).
Can my ceiling fan be surrounded
by insulation?
Yes. NuTone bath fans are designed
to provide adequate cooling for
motors and lighting, as well as
products with integral heaters.
Will NuTone Fans work in
wall-mount applications?
Some NuTone bath and utility fans
may be wall mounted. See the spec
matrix for specific models. Improper
installation may affect fan life,
safety and your warranty.
Will a ceiling fan or wall-mount
utility fan serve as a range hood?
No. Range hoods are specifically
designed to handle grease and high
temperature environments. NuTone
bath fans supplement odor and moisture
removal in the kitchen, but are not
intended for use as a range hood.
What does “static pressure” mean?
Static pressure is the measurement
of airflow resistance as it is pushed
through ductwork which reduces the
effectiveness of the fan. Learn more
on the Home Ventilating Institute
web site www.hvi.org.
How long should a bath fan
run after a shower is used?
The Home Ventilating Institute
recommends that a fan should be
left on for 20 minutes more to clear
humidity adequately and to ensure
moisture and condensation in the
fan body or ducting is minimized.
What should I do if I can’t wait for
moisture to clear, but I don’t want
a fan to run all day long?
NuTone has sensing fans that detect
the humidity rise caused by a shower
and turn on automatically—when
moisture has cleared it turns off.
Some wall controls also give you the
option of humidity sensing, or timer
control. Just set it and forget it.
What are the timer features?
Delay-off timers automatically shut
your fan off after a specified time
interval. It’s a nice feature in high
traffic bathrooms where you may
wish to let the fan run to clear
moisture adequately. A timer counts
down the minutes of fan operation
selected by the user.
Where should the exhaust
fan be located?
Exhaust fans should be located in
or near the shower or tub, and in an
enclosed water closet. Keep exhaust
points opposite the supply air source
to ensure that the fresh air is drawn
through the room. Bathroom doors
should not be sealed too tightly at
the bottom in order to allow “make-
up air” to enter the room when the
door is closed.
How do I size a fan properly for
my room size and the duct run?
See the sizing guidelines on page 7 for
details on proper sizing. This section
provides an explanation and examples
to help you make the right decision.
Where is the exhaust outlet on
the ventilation fan?
The exhaust outlet is the point where
air is discharged through the body
of the fan housing into the ductwork.
During installation, orient your fan
with the exhaust outlet pointing
toward the exit vent on your roof or
wall to minimize turns in ductwork
that impede airflow.
NuTone Ventilation Fans—Questions & Facts
Air Quality
NuTone has long been a leader in
indoor air quality solutions. Our spot
ventilation products for bathrooms
and kitchens control problems at the
source. For whole-house filtration and
ventilation, our fresh air systems set
the standard.
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