Venting Installation - Superior MHW36R Installation And Operation Instructions Manual

FIREPLACE INSTALLATION
Continued
HEARTH EXTENSION
A hearth extension projecting a minimum of 16" in front of and a minimum
of 8" beyond each side of the fireplace opening is required to protect
combustible floor construction in front of the fireplace. Use an equal mate-
rial which meets the following specifications: a layer of noncombustible,
inorganic material having a thermal conductivity of k = .84 BTU IN/FT
HR °F (or less) at 1" thick. For example, if the material selected has a k
factor of 0.25, such as glass fiber, the following formula would apply:
0.25 x 1.0" = 0.30" thickness required
0.84
Thermal conductivity "k" of materials can be obtained from the manufac-
turer or supplier of the noncombustible material. If the hearth extension
is to be covered, use noncombustible material such as tile, slate, brick,
concrete, metal, glass, marble, stone, etc. Provide a means to prevent
hearth extension from shifting and seal gap between fireplace frame and
hearth extension with a noncombustible material (see Figure 7).
WARNING
Hearth extension is to be installed only as shown
in Figure 7.

VENTING INSTALLATION

OUTSIDE AIR KIT
Installation of an outside air kit should be completed during the rough
framing of fireplace due to nature of its location. The supplied flex duct
measures approximately 10" compressed and up to approximately 36"
extended. Outside combustion air is accessed through mobile home floor
using air kit model AK6E, included with the fireplace, or a side wall using
optional air kit model AK6-WE (see Accessories on page 19).
Insert Inner Tab of Inlet Tube into
Slot on Outer Surround
Left Side
Mounting Shown
Figure 8 - Outside Air Kit AK6-WE Installation
6
Insulation
Secure to Collar with Metal
Tape, Screws or Tie Straps
SuperiorFireplaces.US.com
Fireplace
Front
Ember
Protector
2
Fireplace Front
Elevated
Figure 7 - Hearth Extension
Installer may choose either left or right side mounting to allow for
proper wall/rafter clearances.
For AK6-WE Only: Construct a 4-1/2" x 4-1/2" framing or opening on
exterior wall (see Figure 8, page 6).
For AK6E Only: The outside air vent is installed through a ventilated crawl
space (see Figure 9, page 7).
Outside Air Vent
Termination
Seal Gap
Hearth
Seal Gap
Extension
Ember
Protector
Air Vent Location Must
Allow for Bushes, Snow
and Other Possible
Obstructions
127312-01D