Flatfire
Direct Vent Gas Fireplace
Page 7 of 25
Version 10-09
USING THE VENTING CHART
t
device, ve
t
(
in
n a
ormance
e
Please be sure to note that:
enting ch
s and
LP Gas. Determine the total vertical vent rise
om
rise will
rly. E
lso be required for those
ation
stalla
ted
elbo
45° elbow
quivalents
o 45° elbows equal one
ow.
3. The maximum vertical vent ris
xceed
60 feet.
4. If your installation does not fit within the venting
5.
ue air
e
Just as with any o
rise creates draft
as the exhaust gases h
her vented
negative pressure)
eat up. If this dra
rtical ven
the firebox
ft becomes
excessive, it ca
ffect the perf
or
appearance of th
fire.
1. The v
art is for both Natural Ga
and total horizontal vent run for your
installation. All measurements are made fr
the center of the vent opening in the back of the
fireplace.
2. If your fireplace will not be venting directly
though an outside wall to a horizontal
termination or if more than 12” of horizontal
vent run is required, some vertical vent
be required for the fireplace to function and vent
GAS VENTING CHART
prope
install
to a maximum of four 90°
lbows will a
s. However, in
tions are limi
ws (or
e
). Note: Tw
90° elb
e can not e
chart, contact Wittus - Fire by Design. Custom
testing is available and may be necessary to
approve the installation.
The Flatfire fireplace includes a uniq
inlet damper control that can be used to
easily adjust the draft in the fireplace to th
optimal level for installations where
excessive draft might occur. The damper
control can be adjusted while the fireplace
is burning.
Key:
███
= configuration allowed
███
= not allowed or not tested
GAS VENTING CHART FOR BOTH NATURAL GAS AND LP (PROPANE)
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T A L R U N I N F E E T
H O R I Z O N
