7
Vent Installation Procedure
The GI 450 DV Katahdin gas insert must be vented
through dual 3” flexible gas aluminum liners listed for
use with gas appliances.
This co-linear installation includes a pair of 3” flex
ducts that run from the insert up through the existing
chimney.
One duct is attached to the exhaust port on the
back of the unit and will carry the exhaust gases to
the outside of the house. This exhaust liner must run
the full length of the chimney and be directly con-
nected to the chimney termination cap. See figure 2.
The other 3” liner will be attached to the intake
port on the back of the unit and will provide fresh air
for combustion to the unit. This liner must extend a
minimum o
minimum o
minimum o
minimum o
minimum of 6’
f 6’
f 6’
f 6’
f 6’ off the back of the unit and extend
through the damper area of the fireplace and into the
tile liner of the chimney. This liner can also extend the
full length of the chimney and connect to the termina-
tion cap. See figures 2 and 4.
Vent Guidelines
• All vent components must be installed in accordance
with the terms of their listing and manufacturer’s
instructions.
• The minimum height of termination cap from the
top of the unit shall be no less than 10'
10'
10'
10'
10', and the
maximum height shall be no more than 35'
35'
35'
35'
35'. See
figures 2 and 4.
• Steep roofs, nearby trees, or predominantly windy
conditions can promote weak draft or occasional
downdrafts. In such cases, increasing the height of
the vent or installation of high wind termination
caps may alleviate the condition.
• HOR
HOR
HOR
HOR
HORIZ
IZ
IZ
IZ
IZON
ON
ON
ON
ONT
TT
T
TAL RU
AL RU
AL RU
AL RU
AL RUNS ar
NS ar
NS ar
NS ar
NS are not
e not
e not
e not
e not permitted an
permitted an
permitted an
permitted an
permitted anywher
ywher
ywher
ywher
ywhere in
e in
e in
e in
e in
the v
the v
the v
the v
the ven
en
en
en
enting s
ting s
ting s
ting s
ting sy
yy
yystem.
stem.
stem.
stem.
stem.
• Venting liners CANNOT be less than 3” in diameter or
greater than 3” in diameter.
• Any
unused flue or masonry enclosure can be used as
a passageway for venting PROVIDED the flue is
relined using 3” Listed Flexible Gas Liner.
• The remaining space around the liner in a masonry
or zero-clearance flue CANNOT be used to vent any
other appliance.
• Listed Flexible Gas Liners may not be exposed to any
living space.
• Installation of any components not manufactured or
approved by Jøtul or failure to meet all clearance
requirements will void all warranties and could result in
property damage, bodily injury, or loss of life.
• Never modify any venting component, or use any
damaged venting product.
• THE GAS APPLIANCE AND VENT SYSTEM MUST BE
VENTED DIRECTLY TO THE OUTSIDE OF THE BUILD-
ING, AND NEVER ATTACHED TO A CHIMNEY SERVING
A SOLID FUEL OR GAS BURNING APPLIANCE.
• The minimum vent height above the roof or adjacent
walls is specified by building codes. A general guide
to follow is the Gas Vent Rule below.
VER
VER
VER
VER
VERY IMP
Y IMP
Y IMP
Y IMP
Y IMPOR
OR
OR
OR
ORT
TT
T
TAN
AN
AN
AN
ANT
TT
T
T
If the intake flex
does not
does not
does not
does not
does not extend the full length
of the chimney and connect to the unit and the
termination cap - A MET
A MET
A MET
A MET
A METAL B
AL B
AL B
AL B
AL BLLLLLO
O
O
O
OC
C
C
C
CK OFF PL
K OFF PL
K OFF PL
K OFF PL
K OFF PLA
A
A
A
AT
TT
T
TE M
E M
E M
E M
E MUS
US
US
US
UST
TT
T
T
B
B
B
B
BE C
E C
E C
E C
E CONS
ONS
ONS
ONS
ONST
TT
T
TRUC
RUC
RUC
RUC
RUCT
TT
T
TED AN
ED AN
ED AN
ED AN
ED AND I
D I
D I
D I
D INS
NS
NS
NS
NST
TT
T
TALLED AB
ALLED AB
ALLED AB
ALLED AB
ALLED ABO
O
O
O
OVE
VE
VE
VE
VE T
TT
T
TH
H
H
H
HE
EE
EE
U
U
U
U
UN
N
N
N
NIIIIIT B
T B
T B
T B
T BEL
EL
EL
EL
ELO
O
O
O
OW
W
W
W
W T
TT
T
TH
H
H
H
HE EN
E EN
E EN
E EN
E END OF
D OF
D OF
D OF
D OF T
TT
T
TH
H
H
H
HE I
E I
E I
E I
E IN
N
N
N
NT
TT
T
TAKE DUC
AKE DUC
AKE DUC
AKE DUC
AKE DUCT
TT
T
T
(normally at the damper area). See figure 2.
To avoid cross venting the insert, label the duct to
be used for the exhaust conduit at both the top and
bottom ends. This ensures that the exhaust duct will
be attached to the correct collar on the insert and on
the chimney termination kit.
C
C
C
C
CANAD
ANAD
ANAD
ANAD
ANADA NO
A NO
A NO
A NO
A NOT
TT
T
TE:
E:
E:
E:
E: Both In
Both In
Both In
Both In
Both Intak
tak
tak
tak
take and E
e and E
e and E
e and E
e and Exhaust
xhaust
xhaust
xhaust
xhaust duc
duc
duc
duc
ducts
ts
ts
ts
ts
must
must
must
must
must e
e
e
e
extend
xtend
xtend
xtend
xtend the full length o
the full length o
the full length o
the full length o
the full length of
f
f
f
f the chimne
the chimne
the chimne
the chimne
the chimney and be
y and be
y and be
y and be
y and be
ccccconnec
onnec
onnec
onnec
onnected
ted
ted
ted
ted ttttto both
o both
o both
o both
o both the unit
the unit
the unit
the unit
the unit and
and
and
and
and the
the
the
the
the termina
termina
termina
termina
termination
tion
tion
tion
tion
kit
kit
kit
kit
kit.....
VERY IMPORTANT NOTICE:
THE USE OF AN EXISTING CHIMNEY AS AN
AIR INTAKE IS NOT COVERED UNDER THE
ANSI Z21.88-1999-CSA 2.33-M99 TEST
METHODS AND RESULTING ITS/WHI
PRODUCT CERTIFICATION. THE CODE
AUTHORITY HAVING JURISDICTION MUST
BE CONSULTED PRIOR TO PROCEEDING
WITH THIS INSTALLATION METHOD.
GAS VENT RULE
Flat to 6/12
1’0” 0.3M
Over 7/12 to 9/12
2’0” 0.6M
Over 10/12 to 12/12
4’0” 1.2M
Over 13/12 to 16/12
6’0” 1.8M
Over 17/12 to 21/12
8’0” 2.4M
Minimum Height
From Roof
ROOF SLOPE
