Masonry Chimney Conversion - Jøtul GF 370 DV II Installation And Operation Instructions Manual

Horizontal Overhang
18”. 18”.
min.
min.
Termination
Cap
18” min.
Figure 7. Minimum roof pen-
etration height and clearance
from adjacent surfaces - vertical
termination.
IT IS NECESSARY to add restriction to a vertical vent

installation to compensate for excessive draft. See
page 13; Exhaust Restriction Adjustment.
GAS VENT HEIGHT: In no case shall any discharge

opening on the cap be less than 18" (457 mm) hori-
zontally from the roof surface. See fig. 7.
Maximum Vent Height: 35 ft. above the appliance.

Masonry or Prefabricated Chimney
Conversion
The GF 370 DV II is approved for use with direct vent
chimney conversion kits in a masonry chimney or
a prefabricated solid fuel listed chimney. These are
available from most of the manufacurer's listed on
page 8.
The following installation requirements must be
followed:
1. Use the restrictor zone guidelines in the Vent
Window Diagram, fig. 17. In masonry chimney, a
fireclay liner or listed steel liner, must be contained
within the entire length of the chimney.
3. Overall venting should not exceed 35 ft. (10.67 m).
4. The liner must have an inside dimension of 6"
round or greater.
5. Prefabricated chimneys must be UL 103 or ULC
S-629 listed and have a minimum INSIDE diam-
eter of 6 inches, (150 mm). Prefabricated chimneys
must be listed for the specific manufacturer's
conversion kit.
Lowest Discharge
Opening
#991 Vertical Termination Cap
Cap Adaptor-
4" Flex Pipe
not included
in kit
Use Standard
Simpson Dura-
Vent GS Pipe
from stove to
thimble
Figure 8. Vent System through a masonry chimney
using the Simpson Dura-Vent Chimney Conversion Kit
46DV IIA-KMC and 46DV IIA-KCT components. Other
manufacturers use similar designs. Conversion kits
are also available for use with listed prefabricated
chimneys.
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.
139467_03 GF 370 DV II June 2015
Exhaust Gas
Intake Air
Support/Wall
Thimble Cover
9