Vermont Casting 2478 사용자 설명서

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for installing a different appliance without relocating the 
thimble. 
There should be no more than eight feet of single-wall 
stove pipe between the stove and a chimney. Longer 
runs can cool the smoke enough to cause draft and 
creosote problems. Use double-wall stove pipe for 
longer runs. 

Your stove requires a dedicated flue. Do not connect 
the stove to a flue used by any other appliance. Chim-
ney draft is a natural form of energy and follows the 
path of least resistance. If the stove is vented to a flue 
that also serves an open fireplace or another appliance, 
the draft will also pull air in through those avenues.
 The additional air flow will lower flue temperatures, 
reduce draft strength and promote creosote develop-
ment; overall stove performance will suffer. The effect 
is similar to that of a vacuum cleaner with a hole in the 
hose. In some extreme instances, the other appliance 
can even impose a negative draft and result in a dan-
gerous draft reversal.

Even the best stove installation will not perform well 
with poor fuel. If available, always use hardwood that 
has been air-dried (“seasoned”) 12-18 months. Soft-
wood burns more rapidly than hardwood and has a high 
pitch content that can result in creosote. Decayed wood 
of any type has little heat value and should not be used.
Unseasoned (‘green’) wood has a high moisture con-
tent. Much of its heat value will be used to evaporate 
moisture before the wood can burn. This significantly 
reduces the amount of energy available to warm your 
home, as well as the intensity of the fire and tempera-
ture of the exhaust gas. Incomplete combustion and 
cool flue temperatures promote creosote formation and 
weak draft.
You can judge the moisture content of wood by its ap-
pearance and weight or use a commercially available 
moisture meter for an exact measurement. Unsea-
soned wood will be a third heavier than dry wood. Also, 
look for cracks (“checking”) in the ends of the log that 
result from contraction as the wood dries. The longer 
and wider the cracks are, the dryer the wood is.

Creosote is a by-product of low-temperature stove 
operation, weak draft, or both. It is a tar that results 
when unburned gases condense inside the flue sys-
tem at temperatures below 290˚ F. Creosote is volatile 
and can generate a chimney fire. All of the installation 
characteristics that adversely affect chimney draft also 
promote creosote condensation. Consequently, you can 

minimize creosote accumulation with an effective chim-
ney design and the use of operational techniques that 
encourage good draft and complete combustion.

Inspect your chimney frequently and clean it whenever 
accumulation exceeds 1/4”.

Backpuffing is a condition that results when the draft is 
too weak to pull flue gases out of the chimney system 
as fast as the fire generates them. Volatile gases build 
up within the firebox until reaching a density and tem-
perature at which they ignite. With this ignition, you may 
hear a muffled popping sound and see a bit of smoke 
forced out of the stove. 
This condition is most likely to occur in the Spring or 
Fall when moderate outdoor temperatures and low 
intensity fires produce weak draft. If your stove back-
puffs, open the damper to let the smoke rise to the flue 
more quickly. Also, open the air inlets to induce a livelier 
fire and speed airflow through the stove. Avoid large 
loads of firewood at one time. You should always see 
lively, dancing flames in the firebox; a lazy, smoky fire is 
inefficient and will promote draft problems.

An easy way to determine whether your chimney draft 
is strong enough is to close the stove damper, wait a 
few minutes to let the airflow stabilize, and then test 
whether you can vary the strength of the fire by swing-
ing the air control open and closed. Results here are 
not instant; you may need to wait a few minutes for a 
change in the air control setting to have an effect on 
the fire. If there is no change, the draft is not yet strong 
enough to let you close the damper. You will need to 
open it for a while longer and manage the fire with the 
air inlet until the draft strengthens. 
Keep a record of your operating habits and relate them 
to their effects on the stove’s function.  You’ll be reward-
ed with safe and efficient performance. 

Good draft also depends on a sufficient supply of air 
to the stove. The chimney can’t pull in more air than is 
available to it. Sluggish draft can be caused by a house 
that is tight enough to prevent the ready flow of air to 
the stove, or by competition between the stove and 
other appliances that vent indoor air to the outside; i.e., 
exhaust fans for range hoods, clothes dryers, bathroom 
fans, etc. 
If the chimney draws well when all such equipment is 
turned off (or sealed, in the case of fireplaces and/or 
other stoves), you need to be attentive in timing the use