Chimney Installation - RSF Woodburning Fireplaces ONYX AP Owner's Manual

We recommend that the minimum height be increased by approximately 1 ft. for every 2000 ft. elevation above
sea level. Every 30° or 45° elbow also increases the minimum height by 1 ft. For example, if you are living 6000
ft. above sea level, your chimney should terminate at least 15 ft. from the top of the fireplace (12 ft. + 3 ft. for the
6000 ft.). See Table #1 for more precise recommended flue heights.

CHIMNEY INSTALLATION

NOTE: The clearance between the chim-
ney and combustible material must not be
less than 2". DO NOT fill this area with
insulation.
1. Cut and frame the required holes in the
floor, ceiling and roof where the chim-
ney will pass through. Use a plumb
bob. The framing size is 13 1/4" square.
2. From below, install a radiation shield in
each floor through which the chimney
passes. At the attic level, install a
radiation shield plus a storm collar (if
required) as shown in (Figure 8).
3. Place the first chimney length on the
fireplace. Secure the chimney length to
the fireplace with the three screws
provided.
The chimney must extend at least 3 ft.
above its point of contact with the roof and
at least 2 ft. higher than any wall, roof, or
building within 10 ft. of it.
NOTE: If the chimney is higher than 5 ft.
above the roof, it must be secured using a
roof brace.
4. Put the roof flashing into place. Seal
the joint between the roof and the
flashing with roofing tar. For sloping
roofs, place the flashing under the
upper shingles and on top of the lower
shingles. Nail the flashing to the roof
using roofing nails.
5. Place the storm collar over the chimney
and flashing. Seal it with silicone
sealer (DO NOT use roofing tar).
6. Fit the rain cap on the chimney. Secure
it tightly in place.
7. Read and follow the Excel chimney
installation manual
requirements for supports, bracing,
anchors, etc.
ONYX AP Owner's Manual
No com-
bustibles
below this
line
4 1/2"
Figure 7: Close clearance installation
NOTE: openings must
be framed to ade-
quately support any
chimney supports and
roof assemblies
WARNING: DO NOT PACK
REQUIRED AIR SPACES WITH INSU-
LATION OR OTHER MATERIALS
1-hour fire rated enclosure required
when chimney passes occupied living
space (closets, etc.). 2" min. clearance
from chimney.
concerning
Figure 8:Chimney installation
Framing
2" min.
Sheeting
1/2"
min. 2 ft.
min. 10 ft.
min. 2 in.
Onyx AP
12
Chimney
Leave space between the
chimney and the framing
open (no firestop here)
Rain cap
Storm
min. 3 ft.
collar
Flashing
Storm collar
Radiation
shield
45" min. (84 from
base to ceiling) for
sealed enclosure
33" min. (72 from
base to ceiling) for
vented enclosure
Louverd vents
RSF Woodburning Fireplaces