Monessen Hearth BUF500 Electric Heater User Manual


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61D1013 17

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.

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. SeeFigures18and19.
 

4. Attach outside duct to starting collar with duct clamp or screws. SeeFigure19.








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
outside wall covering where the outside vent is to be
located. SeeFigure20.
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. SeeFigure19.


Nail
Holes





6" Diameter
Hole
Duct
Extending
3"min.
AK-4 Inlet
Air Vent
Screw
Screws
Continued
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