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126601-01_J
9
VENTING INSTALLATION
OPTIONAL OUTSIDE AIR KIT (MODEL AK4/AK4F)
The installation of an outside air kit should be performed during
the rough framing of the fireplace due to the nature of it's location.
Outside combustion air is accessed through a vented crawl space
(AK4F) or through a sidewall (AK4).
CAUTION: Combustion air inlet ducts shall not
terminate in attic space.
The maximum height for the air vent can not exceed
3 feet below the flue gas outlet of the termination.
Figure 8 - Outside Air Kit
CHIMNEY PIPE
WARNING: Label part number 900599-01 must
be applied by the installer to all chimney pipe
sections but is not required on sections that will
be visible after the installation is complete. Label
must wrap around the circumference of the pipe.
See accessories, page 25 for Kit F2659.
The IHP chimney system consists of 12", 18", 24", 36" and 48" snap-
lock, double-wall pipe segments, planned for maximum adaptability
to individual site requirements. Actual lengths gained after fitting
overlaps must be taken into consideration (lineal gain) and are
given in the lineal gain chart (see Figure 9). Lineal Gain is the actual
measurable length of a part after two or more parts are connected.
For Canada, use chimney parts designated "HT".
WARNING: The opening in the collar around the
chimney at the top of the fireplace must not be ob-
structed. Never use blown insulation to fill the chimney
enclosure.
Figure 9 - Lineal Gain
ASSEMBLY AND INSTALLATION OF DOUBLE WALL CHIMNEY
SYSTEM
Each double wall chimney section consists of a galvanized outer pipe, a
stainless steel inner flue pipe and a wire spacer. The pipe sections must
be assembled independently as the chimney is installed. When connect-
ing chimney directly to the fireplace, the inner flue pipe section must be
installed first with the lanced side up. The outer pipe section can then
be installed over 5 the flue pipe section with the hemmed end up. Press
down on each pipe section until the lances securely engage the hem on
the fireplace starter. The wire will assure the proper spacing between the
inner and outer pipe sections.
Continue to assemble chimney sections as outlined above, making
sure that both the inner and outer pipe sections are locked together.
When installing double wall snap-lock chimney together, it is impor-
tant to assure the joint between the chimney sections is locked. Check
by pulling chimney upward after locking. The chimney will not come
apart if properly locked. It is not necessary to add screws to keep the
chimney together (exception, see Figure 10, page 10).
The height of a vertical chimney pipe supported
ONLY
by the fire-
place, must not exceed 20 feet. Chimney heights above 20 feet must
be supported.
Secure to Collars with Metal Tape, Screws
or Straps (Min. of 1/4" x 20" in size)
Air Inlet
Location
Must Allow
For Bushes
or Snow
Vent Hood
Required
for Wall
Installation
Air Inlet
Eyebrow
Vented
Crawl Space
(Check Local
Codes Before
Installing in a
Vented Crawl
Space)
LINEAL GAIN
PART NO.
DESCRIPTION
GAIN
Signature
Fireplace
66
1
/
2
" (1690 mm)
12-12DM
12-12HT
Pipe Section
10
5
/
8
" (270 mm)
18-12DM
18-12HT
Pipe Section
16
5
/
8
" (423 mm)
24-12DM
24-12HT
Pipe Section
23
5
/
8
" (600 mm)
36-12DM
36-12HT
Pipe Section
34
5
/
8
" (880 mm)
48-12DM
48-12HT
Pipe Section
46
5
/
8
" (1185 mm)
RLT-12D
RLT-12HT
Round Termina-
tion
7
3
/
4
"* (197 mm)
STL-12D
Square Chase-
Top with Slip
Section
7" (178 mm) to
15"* (381 mm)
* The lineal gain for the terminations is measured to the flue gas outlet
height.
Hemmed
End
12
3
/
8
"
Stainless
Inner Pipe
15" Galvanized
Outer Pipe
