FOCUS 250 Owner's Manual
14
RSF Woodburning Fireplaces
SECURING THE FIREPLACE IN PLACE
Once the fireplace is in its final location, take the time
to attach it to the floor. You can either screw through
the 1"x4" if you left them on the fireplace or through
the hole in the legs of the fireplace if the 1"x4" have
been removed. If possible, try to have at least one if
not two 2" screws into the floor joist.
OUTSIDE AIR DUCT
After the fireplace is correctly positioned, connect the
outside air inlet to the fireplace.
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).
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".
Find a convenient location for the insulated flexible duct and outside air inlet. The outside air inlet can be above or
below floor level (see Figure 7).
The connection for the outside air is located on the bottom of the fireplace. To ease the installation of the flexible
duct, a special elbow was provided that allows the duct to be oriented as required.
1. Use a short Phillips screwdriver to remove the outside air cover located on the bottom of the fireplace on the
left side, three 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 (see
Figure 8).
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.
7. Insert the outside air elbow into the support (see Figure 9) 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 7 Outside Air Connection and Installation
Example
Figure 8 Removing the outside air cover
Figure 9 Installing the outside air elbow
Above Floor
Example
Below Floor
Example
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2" Aluminium
Duct Tape
Insulated Flexible Air Duct
Outside Wall
Outside Air
Inlet
