PEARL 3600 Owner's Manual
10
RSF Woodburning Fireplaces
OUTSIDE AIR DUCT
The use of outside air is not required unless specified
by local building codes. The Pearl 3600 includes a
rotating elbow that connects to the bottom of the unit
and can exit in any direction.
Use an insulated aluminium flexible duct rated at over
200° F. The duct should not exceed 12' vertical rise
above the base of the unit. We suggest using the 4"
RSF outside air kit (FO-INT).
To avoid condensation, it is recommended to use an
insulated duct long enough to include a «P-Trap»
loop.
The air inlet should always be at least 5’ lower than
the chimney rain cap and must never terminate in
attic spaces.
A 4" diameter duct can be used if the total duct run is
less than 25'. For longer runs, use 5" diameter duct.
For a 5" run, you will need to start at the fireplace in 4"
just to get from under the base and then use an
increaser from 4" to 5" to be able to continue in 5".
1. Use a short Phillips screwdriver to remove the
outside air cover located on the bottom of the fireplace, four screws hold it in place.
2. Bend the central part of the cover back and forth to break away the two tabs and remove the central part.
3. Attach the 4" aluminium duct to the inlet of the outside air elbow with metal screws.
4. If the insulated flexible duct has a plastic covering, remove this plastic cover over the flexible duct so that there
is no plastic cover on the duct under the fireplace and for at least 3" away from the fireplace. The plastic cover
MUST NOT get within 3" of the fireplace.
5. Tape the insulation to the aluminum ducting where the plastic cover was pulled back. Using aluminium tape to
hold it in place.
6. If using 5" flexible duct for the rest of the duct run, cut the 4" insulated flexible duct long enough to clear the
fireplace. Completely remove the plastic cover over the 4" duct. Pull back the insulation on the extremity of the
4" duct and attach it to the 4"-5" increaser with metal screws. Pull back the plastic cover and the insulation from
one extremity of the 5" duct. Attach that extremity of the 5" aluminium duct to the 4"-5" increaser with metal
screws. Replace the insulation and plastic over the 4" and 5" insulated flexible duct and tape it in place with
aluminium duct tape. Remember, the plastic cover MUST NOT get within 3" of the fireplace.
Figure 7 Outside Air Cover
7. Insert the outside air elbow into the support and install this assembly onto the fireplace, using at least two of
the screws that were removed previously but do not tighten it yet.
Figure 6 Outside Air Connection and Installation
Above Floor
Example
Below Floor
Example
RS
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Fire
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RS
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Fire
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RS
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Fire
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2" Aluminium
Duct Tape
Insulated Flexible Air Duct
Outside Wall
Outside Air
Inlet
