Premium Choice Bathroom Fan Metal Grille Kit With Radiation Damper Manual
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Ventilation & IAQ
Today’s homes are built to be tighter and more
energy efcient than ever before. Builders and
homeowners use vapor barriers, caulking, and
better sealed doors and windows to reduce
energy loss caused by air inltration. Tighter
homes also mean that pollutants are trapped
indoors. Poor indoor air quality, caused by
trapped pollutants, is not only uncomfortable to
the occupants, but also a health hazard. The
EPA has stated that indoor air quality is often
two to ve times worse than outdoor air, and
that indoor air pollution is among today’s top
ve most signicant risks to public health.
Everyday activities such as showering,
cooking, doing laundry, even breathing are
just a few ways that moisture is generated in
your home (one gallon per person, everyday).
Moisture that is trapped in your home can
lead to structural damage. Signs of structural
damage include heavy condensation on
windows, water damage on window sills and
molds forming in corners of the home.
Healthy indoor air quality (IAQ) is key to the
health of the home and it’s inhabitants. A
combination of both local and whole house
mechanical ventilation should be utilized to
insure a healthy, comfortable home.
Local Exhaust
Local exhaust, also known as intermittent
or spot ventilation, is used in rooms or
localized areas to remove odors, moisture and
pollutants quickly. The most common area
for spot ventilation is bath or powder rooms.
Other areas such as laundry rooms, closets,
bedrooms, kitchens, garages, and utility rooms
also benet from air changes using mechanical
ventilation to maintain good indoor air quality.
Whole House Ventilation
Whole house, or continuous, ventilation
involves exhausting air on a low, continuous
basis. Whole house ventilation is currently
required by many building codes or green
building standards. Most of the codes and
standards have adopted the ASHRAE 62.2
residential ventilation standard.