Table of Contents
Advertisement
►
G. Outside Air Kit (Required on both sides)
Outside air kits must be used for combustion and to pro-
vide cooling air to prevent overheating. Hearth & Home
Technologies recommends you utilize the shortest duct
run to optimize the performance of the outside air kit. The
outside air inlet hoods should be positioned in a manner
that will not allow snow, leaves, etc. to block the inlet. In
some installations the air duct may need to be run verti-
cally. In such an installation, a 3 ft (914 mm) height differ-
ence must be maintained from the top of the uppermost
chimney section to the outside air inlet hoods.
Refer to Figures 3.8 and 3.9 when placing the outside air
inlet hoods.
WARNING! Risk of Fire!
on the both sides of the fireplace to prevent overheating
and fire..
• Cut a 6-1/2 in. (165 mm) hole in outside wall to
accommodate air piping.
• Use 6 in. (152 mm) flex (not supplied) to directly connect
outside air to fireplace intake. Insulate the pipe to prevent
frost condensation.
•
Use the supplied outside air inlet hoods.
• Seal between the wall and the pipe with silicone to
prevent moisture penetration and air leaks.
• Seal between the outside air inlet hoods and the house
with silicone to prevent air infiltration.
CAUTION! Risk of Fire or Asphyxiation! DO NOT draw
outside combustion air from wall, floor or ceiling cavity, or
enclosed spaces such as an attic or garage.
•
DO NOT place outside air inlet hood close to exhaust
vents or chimneys. Fumes or odor could be drawn into
the room through the fireplace.
•
Locate outside air inlet hood to prevent blockage from
leaves, snow/ice, or other debris. Blockages could cause
combustion air starvation and unit to overheat.
NOTICE:
The fireplace provides some outside air for
combustion. Other methods may be necessary if more air
is required.
The outside air kits are installed
NO
Outlet blocked by
snow, leaves, etc.
YES
Clear area
outside
house or in
ventilated
• Use UL181 Class 1 or Class 0 rigid or flexible ducting.
crawl space
• Install with short run or mainly straight duct, except small
dip for cold air trap which will help prevent flow of cold air.
• Secure flex duct with screws or wire ties.
Figure 3.9
Outside Air Installation
Majestic • Ashland ASH36 Installation Manual • 4059-909 • Rev D • 04/19
CAUTION! Risk of Cuts/Abrasions.
gloves and safety glasses during installation. Sheet metal
edges are sharp.
3 ft min. from
top of uppermost
chimney section
to air inlet.
►
Figure 3.8
Outside Air Inlet Locations
NO
Garage or
NO
combustible
liquids storage
Attic space
Factory-built
fireplace
Wear protective
Outside air is
required to be
installed on both
sides (right side not
shown)
NO
Outlet placed
higher than 3 ft
below the
termination cap
15
Advertisement
Table of Contents
