Product Brochure

6
QUIETCOOLSYSTEMS.COM
CENTRAL VS. ZONED SYSTEMS
A centrally installed system is a single fan system
that is installed in a central location in the home,
as the name implies. A single fan system would
typically be installed at the midpoint of a single
story home, or at the top of the stairs in a two-
story home.
A single QuietCool system will nicely ventilate an
entire home, but lacks the individual room control
that a zoned system offers. This is what we call a
“basic” system.
For the earlier 2000 square foot home example, a
ES or CL-6400 is a perfect single-fan system that
provides the “best” ventilation based on the
3:1 CFM:sq.ft. ratio.
For the same example home, a “good” to “better”
single-fan system could be a ES or CL-5400 which
provides just over 2.5:1 CFM:sq.ft. ratio.
A multi-fan zoned system gives the homeowner
maximum control over their ventilation and cooling
needs. This is what we call an “advanced” or “superior”
system, depending on the line of fans chosen.
All zoned fans can be turned on simultaneously
when the entire home needs to be cooled, but a
zoned system allows individual bedroom control,
for example, and thus zoned systems need to be
sized for the zones.
When sizing a zoned system, the combined CFM of
all zoned units needs to add up to the total CFM
requirements.
As you recall from our previous section “Selecting
a System”, our sizing requirements are as follows:
A “good” zoned system would comprise two or
more fans whose total CFM = 4000 CFM or more.
A “better” zoned system would comprise two or
more fans whose total CFM = 5000 CFM or more.
A “best” zoned system would comprise two or
more fans whose total CFM = 6000 CFM or more.