CAI-NJ AprilPROOF2.pdf

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the capability of doing. While this may
address condensation related issues,
the fans that do have this capability
and do not always turn on as required
to prevent ice dam formations from
occurring. Furthermore, lower ventilation
is still required and the location and
number of attic fans serving the attic
must be carefully considered to ensure
that there is an even air flow distribu-
tion throughout the attic. Consideration
must also be given to the design and
location of combustion appliances to
ensure that there is no back drafting of
exhaust gases into the home. It is also
strongly recommended that if an active
attic fan system in place that the ceiling
assembly below the attic be air sealed
to prevent conditioned air from being
pulled into the attic space. More often
than not, attic fan installations do not
consider all of the above, causing the
home to experience one or more of the
above issues. Because of this, attic fan
installations often have more drawbacks
than benefits.
On the other hand, passive venti-
lation systems are far easier to install
correctly, have fewer intangibles to
consider and the benefits of this
system far outweigh any potential
drawbacks. It is for all of the above
reasons that I recommend a properly
designed passive ventilation system
over an active system powered by an
attic fan. As an Architect, and even
more importantly, as a father of three
children whom I adore, it says a lot
that if given the choice, I would prefer
to have a passive ventilation system
installed in my own home.Q
ATTIC FANS...
from page 70.