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How
it Works
Downdraft
exhaust increases the efficiency by at least 15%.
As the exhaust gasses cool, the lower temperatures of
the return water causes greater heat transfer. A
long vertical flame path surrounded by the refractory
assures nearly 100% combustion.
Our
refractory firebox has 6" thick, steel reinforced front
and back panels (4" thick on the sides). The
refractory absorbs radiant heat from the flame and sends
it back into the burning process, raising the combustion
temperature and completing the burn.
 The
Seton boiler loves unsplit logs; if it will fit in the
door, it will burn.
During the
off cycle, the high temperatures of the refractory plus
the lack of oxygen actually "cokes" the wood.
For more
than 20 years, the Seton Boiler has established a
winning tradition of warming homes, shops and factories
all over the United States and Canada.
Of the more
than 2,000 Seton Boilers in use today, over half of them
were purchased by owners of other outdoor boilers.
In these
days of rising heating costs, doesn't it make sense to
move up to the warmth and savings of a well-designed,
high-efficiency Seton Wood Fired Boiler?
The Seton
Boiler design was recognized by the industry at the HPB
Expo. It received the prestigious VESTA award for
design and technological innovation in the Renewable
Fuel Central Systems category.
Six
reasons why Seton Boilers are superior
1.
Refractory. The refractory combustion chamber
ensures a very high combustion temperature and a long
flame path with enough turbulence to complete the
burning of all gases. Once the wood gases are
completely burned, the hot gases enter the heat exchange
area.
2.
Heat Exchanger. The heat exchanger is a down draft
system with the exhaust exiting where the cooled water
is coming in. This increases the deferential
between the water temperature and the exhaust
temperature which lowers the exhaust temperature and
increases thermal transfer efficiency.
3.
Heated Incoming Air. The air coming into the
combustion chamber is heated with the exiting exhaust
gases after all the available heat has been put into the
water of the heat exchanger. This increases the
combustion temperature without taking heat from the
combustion process.
4.
Water Tube Design. The heat exchanger is a water
tube design which absorbs much more heat per square inch
than fire tube boilers, withstands much more pressure
and also holds much less water so it responds quicker.
Because of the very limited water storage water tube
boilers are much safer than fire tube boilers.
5.
High Temperature Combustion. The fire box
temperature exceeds 1900 degrees and the skin
temperature is less than 100 - 200 degrees. This
results in all the gases being consumed before they get
to the exhaust pipe. Wood gasification is the
process of heating wood in an oxygen -limited chamber
until volatile pyrolysis gases (carbon monoxide,
hydrogen and oxygen) are released from the wood and
combusted. Heating the wood to the temperature
range of 400-600 degrees, releases most of the gases,
which yield up to 60% to 80% of the heat content of the
wood are driven off. In the Seton Boiler the emitted
wood gases are then superheated and mixed with air for
complete combustion, leaving little or no ash, and the
heat produced is transferred to the boiler for heating.
6.
Complete Combustion. The extreme radiant energy
from the refractory raises the wood temperature for
pyrolysis while limiting the oxygen in the primary zone.
As the gases rise the preheated draft air combines with
them and completes the combustion. The long flame
path combined with the turbulence and reverse flow
assures a very complete combustion.
UL 391 & CSA B336.1
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