D. Frame the Fireplace
WARNING! Risk of Fire!
You must comply with all mini-
mum air space clearances to combustibles.
DO NOT
pack
required air spaces with insulation or other materials.
WARNING! Risk of Fire!
Comply with all minimum clear-
ances specified.
• A minimum 1 in. (25 mm) air clearance must be
maintained at the back and 1½ in. (38 mm) to the sides
of the fireplace assembly.
• Chimney sections at any level require a 2 in. (51 mm)
minimum air space clearance between the framing and
chimney section.
NOTICE:
Hearth extension design must be determined
before installation of fireplace.
If the fireplace is placed on the floor, the maximum height
of a finished raised hearth (constructed of non-combusti
-
ble material) is 6-1/4 in. (159 mm) If a higher raised hearth
is preferred, the fireplace must be placed on a platform.
NOTICE: Wiring for fans must be done before framed
enclosure is completed. If using a Heat Zone Kit, it
also must be installed before enclosure is complete.
CAUTION!
Risk of Cuts/Abrasions. Wear protective gloves
and safety glasses during installation. Sheet metal edges
are sharp.
E. Secure and Level the Fireplace
This fireplace may be placed on either a combustible or
noncombustible continuous flat surface. Follow the instruc
-
tions for framing in Section 3. Slide the fireplace into posi
-
tion. Be sure to provide the minimum 1 in. air clearance at
the sides and 1/2 in. at the back of the fireplace.
The fireplace should be positioned so the face of the non-
combustible material on the fireplace will be flush with the
face of the drywall on the walls. See Figure 3.6.
Level the fireplace and shim as necessary. Secure the fire
-
place (using the pallet mounting brackets located on either
side of the fireplace) to the sub floor.
Standoffs are attached to the fireplace.
The unit can be positioned with the standoffs touching
combustible walls or framing but DO NOT pack insulation
or other materials in the air space between the fireplace
and wall.
Figure 3.3 shows a typical framing (using 2 x 4 lumber) of
the fireplace, assuming combustible materials are used.
All required clearances to combustibles around the fire
-
place must be adhered to. See Figure 3.2. Any framing
across the top of the fireplace must be above the level of
the top non-combustible framing. (No recess above fire
-
place.)
The finished cavity depth must be no less than 24 in.
(610 mm) from the finished back wall to the outside of
front wall framing. Framing must extend straight up all the
way to the ceiling.
Position combustible
mantel 66 in. (1676 mm) from
base of fireplace
12 in.
(305 mm)
63¼ in.
(1607 mm)
24½ in.
*
(622mm)
57 in.
(1448mm)
51 in.
(1295mm)
The finished cavity depth must be
no less than 24½ in. (622 mm)
from the finished backwall to the
outside of front wall framing.
2 x 4s must be used for the
header and framing above
the header to maintain pipe
clearances.
Double studs to catch
non-combustible board
and wall facing material.
*If interior of chase will be drywalled, add the
thickness to this measurement.
Allow 12 inches minimum
cavity depth if using an
elbow/bend for the
required outside air.
Duct may be installed on
either side.
14 1/2 in. (368 mm) for
SL300 Chimney
16 in. (406 mm) for
DuraPlus Chimney
Non-combustible mantle
may be positioned as low
as 1 in. above the Fascia
(Fronts) and 12 in. deep.
Allow 12 inches minimum
cavity depth if using an
elbow/bend for the
required fan air. Duct
may be installed on either
side.
12 in.
(305 mm)
Figure 3.5 Framing the Fireplace
13
Quadra-Fire • PIONEER - III • 4182-901 Installation Manual • Rev C • 07/19
