Heatmor 100 CSS - E What Can I Burn; Wood; F How Does a Fire Burn out

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What should I burn?
This furnace is designed to burn well-seasoned cordwood ONLY(unless you have a coal option with shaker
grates).
Well seasoned wood is wood that has been properly prepared for combustion. Proper seasoning is generally
accepted to be wood that has been harvested, split if necessary, and stored for a reasonable amount of time.
The most efcient preparation will result in a wood moisture content of 20 percent to 30 percent. If the
moisture content is more than 30 percent a signicant amount of recoverable heat will be utilized in “boiling”
off the water in the wood which escapes as steam. This loss will accelerate as the moisture content increases.
Wood that is too dry will combust too rapidly, thereby increasing heat and fuel loss out of the stack.
Our experience indicates that piece diameters of 6 to 8 inches are preferable. Larger pieces (up to 10 inch
diameter) will perform well as long as they are properly seasoned. Fortunately, the combustion process will
“see” a mix so that larger/smaller and damper/drier wood combinations can still provide a good result.
Learn to load the furnace to most appropriately match the heat demand. Warmer outdoor temperatures
indicate a need for smaller loads, thereby matching demand to supply and resulting in higher efciencies.
Being aware that your individual “Types of Wood” will aid in your decisions.
How does a re burn out?
When the temperature of the water has reached its high limit (185 degrees Fahrenheit), the combustion air
blower(s) shut off. At this point, the re “banks”. When the air combustion blower(s) turn back on, there may not
be enough coals to restart the re. You will then need to restart the re. If this situation occurs , you may want
to transfer to your standard system for better efciency.
A new unit will require the establishment of “bed of coals” which will aid in re-establishing proper combustion.
This may take a few burn cycles.
Please refer to the “Outdoor Wood Furnace Best Burn Practices” located
on the inside front cover of this manual.