10
If the chimney top is not high enough, unusual
downdrafts may occur, resulting in undesired smoke
spillage. For a more thorough explanation of the
figure 27 illustration, this is the traditional 2/10 rule.
The center of your chimney should be a minimum of
two feet higher than any roof or projection within ten
feet horizontally from the chimney center. This
means the chimney does not have to extend above
the peak of the roof. Once the chimney is ten feet
away and extended two feet above roof structure at
that distance, the height is sufficient, but it should
never be less than three feet taller than the point
where it penetrates the surface of the roof.
5.0 Operating Instructions
5.1 Safety Precautions
A fireplace can bring many hours of enjoyment,
comfort and warmth if operated and maintained
properly. Certain safety precautions must be ob-
served to eliminate the dangers associated with fire
and provide a satisfactory, smoke free fire.
A. When burning wood use solid, seasoned wood
only. Do not use scrap wood or artificial wax
based logs, treated coal or woods dipped in pine tar
or pitch.
B. Never use gasoline or other combustible liquids
when starting a fire.
C. Keep the chimney damper open while burning
a fire. Do not interrupt air flow. Ensure sufficient
air is present to support combustion.
The manu-
facturer of this fireplace is not responsible for
interior smoke resulting from lack of combus-
tion air.
CAUTION: WHEN USING THE DECORATIVE
GAS APPLIANCE (VENTED GAS LOGS);
THE FIREPLACE DAMPER MUST BE
SET IN THE FULLY OPEN POSITION.
D. Keep a screen in front of the fireplace except
when tending the fire.
E. Keep combustible furniture/pillows at least four
feet from the opening.
F. Never leave the fire unattended.
G. Be extremely careful when adding wood and
handling fireplace tools. Never throw, kick or by
any other means force wood into the firebox as this
could damage the firebrick and fireplace walls that
could result in permanent damage and void the war-
ranty. Stress cracks from thermal cycling are nor-
mal.
H. Do not alter this fireplace to the extent that it
would jeopardize the structural integrity of the fire-
place. Drilling or cutting a hole for a gas line, fresh
air vent or ash dump is acceptable. Use only Stone
Age authorized equipment with this fireplace.
5.2 Selection of Wood
Use cured wood logs only. Scrap wood produces
sparks. Treated wood, coal, or woods dipped in pine
tar should not be used because they may leave a
combustible residue in the fireplace and chimney.
Use of seasoned wood is preferred.
The amount of heat available from logs will depend
on the type of wood, its dryness, quantity of wood
and the size of the logs. Ten pounds of twigs will
produce as much heat as a 10 pound log, but will
produce it much faster because the air supply is more
available.
5.3 Softwood vs. Hardwood
Wood is divided into two classes, hard and soft
woods. Each has a use in a fireplace and each has
advantages and disadvantages.
The hardwood category includes such woods as oak,
walnut, birch, elm and maple. Softwoods include
pine, fir, cedar and spruce.
Selection of wood depends on the type of fire you
want. Softwoods are good to offset a morning chill
because the fire develops faster. Hardwoods are
preferable for a slower burning and uniform heat
output.
Softwoods contain a highly flammable resin that will
leave creosote soot in the chimney flue. This often
results in sparking. Burning softwood exclusively
will require more frequent inspection and cleaning of
the chimney.
Experienced fire builders often use small amounts of
softwood kindling and newspaper when starting a
split hardwood log fire.
5.4 Seasoned Wood
Most freshly cut “green” wood will not burn well
and will smoke. The pressure of moisture and resin
inside green wood will build under heat and explode
Summary of Contents for NA72IND
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