13
CLASSIC EDGE OUTDOOR FURNACE • OWNER'S MANUAL
Combustion
Air Outlets
(one side of firebox
shown - same on
other side)
Secondary Air
Charge Tube
Keep the combustion air outlets open and clear of ash
and coals to allow the furnace to operate properly.
2. Gasified fuel exits the bottom of the firebox alongside and under the
secondary air charge tube, through the mixing channel and down to the
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
Mixing
Channel
3" (8 cm) Max.
Coals
Ash
Ash
Reaction
Chamber
Primary
Combustion
Air Outlets
© 2015 Central Boiler
CORRECT
(Proper Flow)
Front View
NOTE: The illustration shows the Classic Edge operating correctly with proper combustion
air flow and with the wood properly loaded.