14
Heatilator • FL92 Installation Manual • 4012-081 • Rev C • 10/03/13
Outlet placed
higher than 3 ft
below the
termination cap
Attic space
Garage or
combustible
liquids storage
Outlet blocked by
snow, leaves, etc.
Clear area
outside
house or in
ventilated
crawl space
YES
NO
NO
NO
NO
Factory-built
fireplace
• Use UL181 Class 0 or Class 1 rigid or flexible ducting.
• 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 metal tape, screws or wire ties.
Figure 3.9 Outside Air Installation
Outside Air
Hood
Outside Air
Plate
Assembly
2 Wire Ties
Flexible Duct
(not supplied)
• Hearth & Home Technologies Inc recommends using
UL181 Class 0 or Class I rigid or flexible ducting.
• Secure flex duct with metal tape, screws or wire ties.
Figure 3.8 Typical Outside Air Installation (BAY-40 will be in-
stalled from the bottom of the fireplace)
G. Install Outside Air Kit
• Keep duct runs short and straight to minimize restriction.
A small dip is acceptable for a cold air trap.
• Locate the outside air inlet hood in a clear area,
preferably into prevailing wind during the heating season.
Refer to Figure 3.9.
• Install as shown in Figures 3.8 and 3.9.
• The air duct may be run vertically.
• The outside air inlet hood must be at least 3 ft (.91 m)
below the top of the uppermost chimney section.
• Seal between the wall and the pipe with silicone to
prevent moisture penetration and air leaks.
• Seal between the outside air inlet hood 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 ex-
haust 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.
AK14/AK18 Installation
• The hinge will be toward the front of the fireplace.
• Insert the narrow end of the handle into the upper slot.
• Pivot the handle in the slot toward the hinge.
• Remove the cover plate or knockout from the side of the
fireplace and discard. Remove the semi-perforated piece
of insulation covering the opening (insulated fireplaces
only).
• Partly open the air kit door and insert the handle into the
appropriate hole in the side column of the fireplace. The
hinge on the door assembly should be located toward
the front of the fireplace. If the hinge and the handle are
not positioned in this manner, the door will not function
correctly.
• Attach the door assembly to the fireplace using the
screws provided.
• Check operation by pulling the handle out to open and
pushing it in to close.
• Mark and cut out a 4 1/2 in. (114 mm) hole in the building
side for air entry. This hole should allow some framing
(two sides) so the 4 in. (102 mm) diameter inlet tube
assembly may be fastened properly.
• Assemble flexible duct (not supplied) between the door
assembly and the inlet tube assembly. Secure it in
position with the supplied wire ties.
• Feed duct through hole to the outside, fasten to the hood
assembly.
• Fasten outside air hood assembly to the structure with
screws.