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#970 HEAT DUCT KIT
4.0 #970 HEAT DUCT KIT
CAUTION : Read and follow instructions carefully prior to and
during the installation of the optional heat duct kit.
WARNING: Installation of this heat duct kit and its electrical
wiring must be performed by a qualified service person, and
must be in accordance with local codes, or in the absence of
local codes, with the National Electrical Code, ANSI/NFPA 70,
or the Canadian Electrical Code, CSA C22.1.
Do not substitute the flexible heat duct pipe with plastic vent
pipe.
4.1 Kit Components
NOTE: A junction box, cover, and hardware must be purchased
to mount the speed control.
(1) 6” (152 mm) diameter flexible heat
duct pipe, expandable to 20 ft. (6.10 m)
(2) Mounting brackets
(1) Register mounting frame with collar
(11) Sheet metal screws
(1) Register cover with screws
(4) Sheet rock screws
(1) Duct collar
(3) Flange nuts
(1) Fan assembly
(1) Strapping cord
(1) Fan housing cover plate
(3) Wire nuts
(1) Speed control mounting bracket
(2) Fan wire connectors
(1) Speed control
4.2 Specifications
• The appliance is manufactured with (2) heat duct knock-outs.
One, or both, may be utilized.
• The register mounting frame is designed to fit between 2” x
4” stud walls, 16 in (406mm) on center.
• An oval duct pipe (equivalent to 6 in [152 mm] round) can be
used in conjunction with the included 6 in (152 mm) diameter
flexible heat duct pipe, included with this kit. It must be
purchased from a HVAC supplier.
• Carefully plan location of duct pipe runs and register in
relation to fireplace.
Table 4.1, Heat Duct Clearances
From flexible duct to combustibles
0 in
0 mm
From air duct to ceiling
2 in
51 mm
Table 4.2, Heat Duct Vent runs
Vent Run
Minimum
Maximum
Any direction, including
downward
2 ft
609 mm
20 ft
6.1 mm
Figure 4.1
