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If
you’re
looking
to
cut
fan
energy
use
and
expense
without
a
major
investment
in
new
equipment
and
installation
costs,
consider
the
5-foot
ceiling
fan.
In a
recent
study
by
Southern
California
Edison,
UC
Davis,
and
the
California
Energy
Commission,
5-foot
ceiling
fans
were
compared
under
summer
conditions
in
large
commercial
dairies
to
the
traditional
36-inch
wall-mounted
direct
drive
fans
and
20-foot
ceiling
fans.
To
achieve
equal
airflow
volume,
each
1000
cow
free
stall
barn
was
equipped
with
either
one
hundred
5-foot
ceiling
fans,
one
hundred
36-inch
wall
fans
or
seventeen
20-foot
ceiling
fans.
Comparisons
showed
that
barn
cooling
and
cow
performance
response
between
these
different
fan
options
was
equal
with
the
following
bottom
line
results:
-
5-foot ceiling fans – (Agrifan ceiling fans) Equipment and installation
costs
per
fan,
$330.
Total
energy
cost
(100
fans)
per
year
$1800
(83%
savings
over
wall
fans).
-
36-inch wall fans -- Equipment and installation costs per fan,
$700.
Total
energy
cost
(100
fans)
per
year
$10,760.
-
20-foot ceiling fans – Equipment and installation costs per fan
$5,325.
Total
energy
cost
(17
fans)
per
year
$1,496
(86%
savings
over
wall
fans).
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