DELTA FUSION Owner's Manual
16
RSF Woodburning Fireplaces
OUTSIDE AIR DUCT
If an outside air duct is required in your jurisdiction,
connect the outside air inlet to the outside after the
fireplace is correctly positioned (see Figure 7).
Use an insulated aluminum flexible duct. The duct
should not exceed 12' vertical rise above the base of
the unit.
The air inlet should
be at least 5’ lower than the top
of the chimney flue 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.
Both 4" and 5" connecting sleeves are provided with
the fireplace.
1. Find a convenient location for the combustion air
duct and outside air inlet. The outside air inlet can
be above or below floor level.
2. Make a 4 ¼" (5 ¼" if using a 5" diameter duct) hole
in the outside wall of the house. Push the outside
air inlet in from the outside. Seal the joint between
the air inlet and the outside wall with an appropriate sealant.
3. Place the insulated flexible duct over the round sleeve on the outside air inlet. At both ends, carefully pull back
the insulation and plastic cover, exposing the flexible duct. Then at each end, attach the duct with metal screws
to the inlet and tube. Carefully push the insulation and cover back over the duct. Tape the plastic cover in place
with 2" aluminum duct tape.
❖
CAUTION: WHEN RUNNING THE DUCT AROUND CORNERS, BE SURE TO PREVENT CRIMPING THE
DUCT THAT WOULD RESTRICT THE COMBUSTION AIRFLOW.
CHIMNEY
This fireplace is certified for use with 8" ICC Model EXCEL chimney only. Please refer to Table 1 (D-E) for the
minimum and maximum chimney height permitted with the DELTA FUSION fireplace.
We recommend that the minimum height be increased by approximately 6" for every 1000' elevation above sea
level. Every 15°, 30° or 45° offset (one pair of elbows) also increases the minimum height. See Table 2 for more
precise recommended flue heights.
For example, if you are living 6015' above sea level, your chimney should terminate at least 15' from the top of the
fireplace if it is a straight chimney or at least 18'6" if one 30° offset is used as shown in Table 2.
Figure 7 Outside Air Connection and Installation
Example
Above Floor
Example
Below Floor
Example
RSF
Fire
pla
ce
RSF
Fire
pla
ce
RSF
Fire
pla
ce
2" Aluminium
Duct Tape
Insulated Flexible Air Duct
Outside Wall
Outside Air
Inlet
