Flatfire
Direct Vent Gas Fireplace
VENTING CHART WORKSHEET
WITTUS FLATFIRE WORKSHEET
A. FUEL TYPE:
NATURAL GAS
LP GAS (PROPANE)
B. TOTAL VERTICAL VENT RISE (measured from horizontal ce
f vent opening
nterline o
on the back of the fireplace to the horizontal centerline of the vent cap (for horizontal
vent caps) or to the flange on the cap (for vertical caps)):
FEET
C.
c
TOTAL HORIZONTAL VENT RUN (measured from vertical enterline of vent opening
on the back of the fireplace to the flange on the cap (for horizontal caps) or to the
vertical centerline of the cap (for vertical caps)):
FEET
NOTE: THE VERTICAL VENT RISE AND HORIZONTAL VENT RUN ARE THE OFFSETS IN THE
LOCATIONS OF VENT CAP RELATIVE TO THE VENT OPENING ON THE FIREPLACE. VENT PIPE
THAT RUNS AT 45° HAS BOTH A VERTICAL RISE AND HORIZONTAL RUN. SNORKEL CAPS HAVE
BUILT-IN VERTICAL RISE THAT MUST BE COUNTED.
D. TOTAL NUMBER OF 90° ELBOWS (note – snorkels count as 2 90° elbows): # 90° ELBOWS
E. TOTAL NUMBER OF 45° ELBOWS (note – 2 45° elbows count as 1 90° elbow): # 45° ELBOWS
F. TOTA
:
L 90° ELBOWS EQUIVALENT
= D. + (E. x ½)
G. 90° ELBOWS
IN EXCESS OF 2:
= F. - 2
H. ADDITIONAL HORIZONTAL FEET EQUIVALENT:
FEE
G. x 3
T =
I. TOTAL HORIZ NT L V NT UN
O
A
E
R
(equivalent):
FEE = C. + H
T
.
TER
TIO
C P) YPE:
ORIZONTAL
VERTICAL
SNORKEL
MINA
N ( A
T
H
VEN
Simps
D aV t
G /Pr
elk Di ct-
mp
T
BRAND:
on ur
en
S
o®
S
irk
re Te
®
AmeriVent Direct™
M tal F b D rec
en
XC LDi ct
e
a
i
t V t
E
E
re
VEN
P M DE NO.
(S
E VE T C PS
T CA
O
L
EE APPROV D
N
A
)
:
‘
See
ple bel
.
exam
s
ow
VEN
CH
T WO KS EE EX MP ES
.
l
atu
l G s
TING
AR
R
H
T
A
L
A
Fue :
N
ra
a
B.
A.
Fu l:
P G s
a Ver al
e
5
fee
Tot l
tic Vent Ris :
5
t
C.
a Horiz. V
a :
0 feet
Tot l
ent Run (Actu l)
D.
lbows Neede
0
90° E
d:
E.
lbows Neede
0
45° E
d:
F.
a 90° lbo s E uiva ent
0
Tot l
E
w
q
l
:
G. 90° Elbows in
0
Excess of 2:
H. Additional Horiz. Feet Equivalent
0
I. Total Horizont
e
u
E
v.
0
al V nt R n ( qui ):
Vertical DuraVent 46DVA-VC Vent Cap
e
L
a
B
Total Vertical Vent Ris :
2
feet
.
e
1
C To l H riz. Vent Run (Act l):
0 fe t
.
ta
o
ua
1
e
D 90 Elb ws eed d:
.
°
o
N
e
1
E
45 Elb ws eed d:
.
°
o
N
e
2
F
To l 9 El ws Equivale
.
ta 0°
bo
nt :
2
G. 90° Elbows in Excess of 2:
0
H Ad itio l H riz. Feet Equi alen
.
d
na
o
v
t
0
I. T
10
o
o
V
tal Horiz ntal ent Run (Equiv.):
Horizontal DuraVent 46DVA-HC Vent Cap
Page 8 of 25
Version 10-09
