18
79D0004
Lo-Rider Designer Vent Free Fireboxes
use of optional ak-4 outsiDe air kit
The use of outside air for combustion is optional unless required by building codes. It is
only necessary to supply outside combustion air to one side of the fireplace. Use the model
AK4 combustion air kit.
moDel ak-4 Combustion air assemblY
1. Remove the cover plate from the 4" outlet opening location on the left or
right outside of the fireplace.
2. Place the insulation ring between the AK-4 starting collar and fire-
place wall.
3. Place the starting collar (4") into the hole on the side of fireplace. Fasten
it in place with the four sheet metal screws provided.
Figures 26 and 28
note: the air starting collar extends through the fireplace outer wrap. When the
air starting collar is securely attached, it will form a seal against the fireplace wall.
4. Attach outside duct to starting collar with duct clamp or screws.
Figure 27
Do not remove the
cover if the outside air
will not be connected.
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figure 26 -
attaching outside air starting Collar and insulation
ring to left side of fireplace
figure 27 -
attaching outside Duct to starting Collar
Insulation Ring
AK-4 Starting
Collar
Sheet Meal
Screws
left Side of
Fireplace
Shorter End of Air
Starting Collar
Air Starting
Collar
Duct
Screws
left Side of
Fireplace
5. Cut a 6-inch diameter opening for model AK-4 in the out-
side wall covering where the outside vent is to be located.
Figure 28.
6. Select and cut a piece of duct long enough to attach to
the fireplace and stick out at least 3" beyond the face of
the wall to which the AK-4 inlet air vent will be attached.
Figure 27
figure 28 -
Combustion air assembly for model no. ak-4
Nail Holes
use fp-4 u duct for maximum efficiency
and safety. Do not use a combustible
duct. always use ul listed Class 0 or
1 duct material.
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G
6" Diameter Hole
Duct Extending
3"min.
AK-4 Inlet Air
Vent
Screw
Screws