15
EFFICIENCY
Ef
fi
ciencies can be based on either the lower heating value (LHV) or the higher heating value (HHV) of the fuel. The lower heating
value is when water leaves the combustion process as a vapor, in the case of woodstoves the moisture in the wood being burned
leaves the stove as a vapor. The higher heating value is when water leaves the combustion process completely condensed. In the
case of woodstoves this would assume the exhaust gases are room temperature when leaving the system, and therefore calculations
using this heating value consider the heat going up the chimney as lost energy. Therefore, ef
fi
ciency calculated using the lower
heating value of wood will be higher than ef
fi
ciency calculated using the higher heating value. In the United States all woodstove
ef
fi
ciencies should be calculated using the higher heating value.
The best way to achieve optimum ef
fi
ciencies is to learn the burn characteristic of you appliance and burn well-seasoned wood.
Higher burn rates are not always the best heating burn rates; after a good
fi
re is established a lower burn rate may be a better option for
ef
fi
cient heating. A lower burn rate slows the
fl
ow of usable heat out of the home through the chimney, and it also consumes less wood.
OPERATIONAL TIPS
Operational Tips for Good, Ef
fi
cient, and Clean Combustion
•
Get the appliance hot and establish a good coal bed before adjusting to a low burn rate (this may take 30 minutes or more
depending on your wood)
•
Use smaller pieces of wood during start-up and a high burn rate to increase the stove temperature
•
Be considerate of the environment and only burn dry wood
•
Burn small, intense
fi
res instead of large, slow burning
fi
res when possible
•
Learn your appliance’s operating characteristics to obtain optimum performance
•
Burning unseasoned wet wood only hurts your stoves ef
fi
ciency and leads to accelerated creosote buildup in your chimney
WARNINGS
•
NEVER OVERFIRE YOUR STOVE. IF ANY PART OF THE STOVE STARTS TO GLOW RED, OVER FIRING IS
HAPPENING. READJUST THE AIR INTAKE CONTROL AT A LOWER SETTING.
•
THE INSTALLATION OF A LOG CRADLE OR GRATES IS NOT RECOMMENDED IN YOUR WOOD STOVE.
BUILD FIRE DIRECTLY ON FIREBRICK.
•
NEVER PUT WOOD ABOVE THE FIREBRICK LINING OF THE FIREBOX.
•
ATTEMPTS TO ACHIEVE HEAT OUTPUT RATES THAT EXCEED HEATER DESIGN SPECIFICATIONS CAN
RESULT IN PERMANENT DAMAGE TO THE HEATER.
Summary of Contents for Shiloh TR002
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