DELTA FUSION Owner's Manual
19
RSF Woodburning Fireplaces
OFFSET CHIMNEY
An elbow may be installed directly on top of the fireplace if required. See the detailed offset charts in the EXCEL
chimney installation manual. Use the offset option if you need to clear a joist or pass around a cupboard. See Figure
9 and Figure 10 for examples.
•
Maximum offset angle:
•
In
USA
: 30°;
•
In
Canada
: 45°.
•
Maximum number of elbows: four, resulting in two offsets and returns.
Install the fireplace and chimney as described earlier. When you require an elbow, proceed as follows:
1. Install the required elbow. Turn it in the desired direction, and fasten it to the other section with 3 metal screws
at the joints.
2. Install enough lengths to obtain the desired offset. Secure each joint with 3 metal screws.
3. Use another elbow to return the chimney to the vertical direction.
4. Install a roof support, a wall support, or an offset support above each offset to support the weight of the chimney
(elbows are not designed to support the chimney above an offset). The support can be installed anywhere
practical along the vertical course of the chimney as long as it is above the offset.
Through the Wall Offset
You can also go through the wall at an angle starting directly at the fireplace as depicted in Figure 10. An angled
wall insulated radiation shield (XM-8EWRSI30 or XM-8EWRSI45) must be used wherever the chimney passed
through an exterior wall. Make sure you have enough ceiling height. If not, you might want to consider installing the
fireplace in an outside chase.
If the chimney is enclosed once outside of the house, do
not install the outside plate of the angled wall insulated
radiation shield.
Refer to the angled wall insulated radiation shield
installation sheets for more detailed installations
instructions.
Make sure not to forget to install the small shield to
protect the top area of the opening through the wall. This
small shield is provided with the angled wall insulated
radiation shield.
CHASE ENCLOSURE
If the chimney runs up the outside of the house, we
recommend that it be enclosed in a chase structure. The
chase should be constructed in such a way that it is an
extension of the home. It should be well insulated
between the footings and the floor of the home to prevent
heat loss. If the climate in your area is mild, insulate the
chase at least to the first firestop. If the climate in your
area is very cold, insulate the chase to the top to keep
the chimney warmer, increase the draft, and reduce
creosote buildup.
We also recommend insulating the
ceiling of the chase just as if it were in the attic space.
This will prevent cold air from dropping down through the
chase and into the room where the fireplace is installed
(see Figure 11).
Some local codes require that the walls be insulated,
vapor sealed and sheathed with a fire rated gypsum
board (see Figure 11). We strongly recommend this
procedure for all installations to prevent cold drafts from
Figure 11 Chimney Installed with a Chase
Enclosure Example
10'
2' min.
Optional
Decorative
Shroud
Insulation
Chase liner of fire rated
gypsum board is
recommended (may be
required by local authorities)
Radiation
Shield,
with Storm
Collar in
the Attic
RS
F
Fi
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