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CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
NOTE: The combustion air inlets must be visible (i.e., ash must be kept below the
combustion air inlets as shown).
Air
Charge Tube
Keep the combustion
air tube inlets
open and clear of
ash and coals to allow
the furnace to operate
properly.
Keep the area on BOTH
sides of the air charge
tube open
Combustion
Air Tube w/Inlets
(one side of firebox shown -
same on other side)
For illustration purposes. Your furnace
may have different configuration.
2. Gasified fuel exits the bottom of the firebox alongside and under the
air tube, down to the Fusion Combustor and Reaction Chamber. Final
combustion occurs in the Reaction Chamber where extremely high
temperatures aid in complete combustion. The chimney creates a
draft (negative pressure) which helps to draw exhaust gases from the
furnace.
3. Heat is transferred to the water from the hot gases as they move
through the firebox, the Reaction Chamber and the heat exchanger.
Flow
Secondary
Air
Fusion
Combustor
5" (12.7 cm) Max.
Coals
Ash
Ash
Reaction
Chamber
Primary
Combustion
Air Inlets
CORRECT
(Proper Flow)
Front View
NOTE: The illustration shows the CleanFire operating correctly with proper combustion
air flow and with the wood properly loaded.
NOTE: A key point to remember about the operation of the CleanFire is that as wood
burns, the combustion gases flow down through the bottom of the firebox so the
proper flow must be maintained as shown.
NOTE: Refer to the General Troubleshooting Information for more information on
outdoor furnace operation and for conditions to avoid.