The Importance of Kitchen and Bathroom Fans
Bathroom and kitchen fans are an important part of
your home's ventilation system. They remove odors
and moisture from your home, which improves indoor
air quality.
High humidity can damage building materials. High
humidity can cause mold growth — and mold may
affect your family's health.
How Do I Choose the Best System?
Choose the quietest, most energy-efficient fan in
the size range required. Most fan labels have Home
Ventilation Institute ratings so you can compare noise
and energy efficiency.
A fan suitable for continuous use is preferable. Be
prepared to pay more for a quality fan.
Select low-resistance (smooth) exhaust ducting. Seal
the joints and insulate sections that run through
unheated spaces.
Place the exhaust hood where it will not cause moisture
damage on exterior surfaces.
If you have heating appliances with chimneys, make
sure that fans won't cause the appliances to backdraft.
Kitchen Range Hoods
A kitchen range hood must move more air than a bathroom
fan. About 100 to 300 cfm. As a result, they are noisier,
with the lowest rating about 4.5 sones, although they
can be relatively quiet and effective on low speed.
The most useful units have a low noise rating, an
energy-efficient fan, fluorescent lights, sound insulation,
anti-vibration mounts and duct connections. For heavy-duty
use, select non-corrosive materials such as aluminum
or stainless steel. High quality hoods may have heat
sensors and a safety shut-off.
Kitchen exhaust systems should discharge outdoors.
Keep the exhaust systems clean, a grease fire is difficult
to extinguish.
