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Figure 8 - Air Kit Installation
Figure 9- Air Kit Damper Rod
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)
VENTING INSTALLATION
OPTIONAL OUTSIDE AIR KIT (MODELS AK4 OR 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 and exterior
wall (AK4) or a vented crawl space (AK4F). See Figure 8 and
Accessories on page 16.
Avoid installing outside air eyebrow in areas where inlet opening
may be blocked by snow, bushes or other obstacles. It should also
be located beyond the reach of children.
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.
For further details on installation of outside air kit, please refer to
instructions included with air kit. For operating instructions, please
refer to your owner’s manual.
Outside air handle is located on left-hand side of fireplace refractory
(see Figure 9, Model WRT40CRWSI shown). To close, pull down;
to open, push up. Always open mechanism when starting a fire to
provide adequate outside combustion air. Close mechanism when
not in use to prevent cold air from entering room.
Air Kit
Damper
Rod-
Closed
Position
Open
Position
Lower Left Side
of Fireplace
Opening
CHIMNEY SYSTEM
Chimney height
Minimum chimney height measured fro bottom of fireplace to flue
gas outlet-end of termination is:
Straight run
14 feet
Run with one elbow set 15 feet
Run with two elbow sets 24 feet
An elbow set consists of one starter elbow and one return elbow.
Uncommon circumstances such as neighboring hills, tall trees, or
strong wind areas can cause downdrafts in chimney system. In
such cases, going beyond minimum recommended height would
be preferable to provide a better draw.
Maximum height approved for any chimney run with this fireplace
system is 60 feet as measured from fireplace bottom to flue outlet
end of termination.
Double Wall Chimney System
An 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 lineal gain chart (see Figure 10, page 8).
Lineal gain is actual measurable length of a part after two or more
parts are connected.
Each double wall chimney section consists of a galvanized outer pipe,
a stainless steal inner flue pipe and a wire spacer. Pipe sections must
be assembled independently as chimney is installed. When connecting
chimney directly to fireplace, inner flue pipe section must be installed
first with lanced (female) side up (see Figure 10, page 8). Outer pipe
section can then be installed over flue pipe section with hemmed (male)
end up. Press down on each pipe section until lances securely engage
hem on fireplace starter. The wire will assure proper spacing between
inner and outer pipe sections.
Continue to assemble chimney sections as outlined above, making
sure both 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 chimney sections is locked. Check by
pulling chimney upward after locking. Chimney will not come apart if
properly locked. It is not necessary to add screws to keep chimney
together. However, if desired, use screws per directions provided
on page 8, Figure 11.
Note: For Canada, use chimney parts designated HT.
