Brochure

EASY STEPS FOR CHOOSING AND SIZING THE RIGHT
VENTILATION FAN FOR YOUR HOME.
Determine which rooms could use ventilation, and how much is needed. Spot ventilation is used in localized
areas to remove moisture, odor and airborne pollutants quickly. Most commonly used in the bath or powder room,
spot ventilation can also be used in a laundry room, exercise area, closet, or bedroom, wherever air should be
changed frequently. Decorative and recessed models can be ideal solutions for these situations. According to the
Home Ventilating Institute (HVI), Air Changes per Hour (ACH) for comfortable and healthy living should be as follows:
Bathrooms: 8 changes, Kitchens: 15 changes, Living/Bedrooms: 6 changes. NuTone bath fans, utility fans and high
capacity fans can meet these needs.
Calculate the air movement necessary for proper
ventilation. Air movement is measured in Cubic Feet per
Minute (CFM). To determine CFM requirements, first
determine the size of your room. Measure and multiply
the length, width and ceiling height of your room to
determine cubic footage. Then use the multiplication
factor of .13 and round up to the next “ten.” See the three
examples that follow.
Example 1:
Bathroom with 8' ceiling:
7' wide x 9' long x 8' high x .13 = 66. Select a bath fan
with at least 70 CFM
Example 2:
Bathroom with 9' ceiling: 10' wide x 9' long x 9' high x .13
= 105. Select a bath fan with at least 110 CFM
Example 3:
For a bathroom with a vaulted ceiling, use the average
ceiling height at the wall and the peak:8' wide x 12' long
x ((8' at wall + 12' at peak) / 2 = 10') average height x
.13 = 125. Select a fan(s) with at least 130 CFM
Account for long duct runs and ductwork that turns
before it reaches the exterior vent. When airflow is
restricted in any way it slows down. Just as a car must
slow down for a sharp corner, air decelerates when
going through a turn in a duct run. Whenever possible,
create a straight duct run with large radius turns, if
they’re necessary at all. Rigid ductwork is optimal
because airflow restriction is minimized. Flexible tubing
may be convenient to install, but resistance is created
as air is moved over the spiral metal frame of the tubing.
With long duct runs or ducts with multiple turns the fan
works harder, noise increases and fan performance
(CFM) is compromised. Select a fan model with an even
greater CFM rating to compensate.
6" ducting overcomes most performance-related
installation issues. QTX Green Series fans deliver high
performance in virtually any real-world installation.
They are engineered with a 6" duct connector for peak
air movement and extremely quiet operation, even when
the duct run is not short and straight.
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