WOOD IS A SAFE, CLEAN AND ECONOMICAL FUEL
**To change liters into US gal., multiply by .264.
For the least amount of wood handling, the wood with the highest heat content is most desirable.
An open fireplace can actually refrigerate a house because it sucks in so much cold air that is only
partially used for combustion. A carefully designed fireplace makes use of perhaps 10-15% of the heat
available: most still going up the flue. The well-constructed potbellies get perhaps 20-25% and the
automatic draft regulated, tightly sealed wood heaters get perhaps 50%.
Notice that the percentages efficiency goes up as the combustion process becomes more and more
controlled. The roaring fire is a complete waste of fuel. The best situation is one where the combustion
chamber is gas-tight. This allows a controlled fire that toasts the wood and puts the right quantity of wood
gas in the right place and at the right temperature for optional combustion and heat transfer.
The NEWMAC WOOD FURNACE toasts the wood to charcoal and the charcoal burns to dust leaving a
minute amount of residue. From the above heat values, it can be seen that a cord of Hickory wood is
equivalent to $661.92 (@ 89.0¢ liter) worth of oil, over twice as much as you would pay for a cord of
wood.
Without taking into account all the free wood that is available. EFFICIENT WOOD HEATING cuts your
heating costs in half.