Drolet WOODSTOVES - Manual (Page 21)

20
WOODSTOVE UTILISATION
Your heating unit was designed to burn wood only; no other materials should be burnt.
Wastes and other flammable materials should not be burnt in your wood stove. Any type
of wood may be used in your stove, but specific varieties have better energy yields than
others. Please consult the following table in order to make the best possible choice.
AVERAGE ENRGY YIELD OF ONE AIR DRIED CORD OF CUT WOOD
Wood species
Energy yield
(millions of BTU/cord)
Oak 29
Sugar Maple 28
Beech 26
Yellow birch 25
Ash 24
High energy yield
Elm 23
Larch (Tamarack) 23
Red Maple 23
Douglas red fir 23
Silver birch 22
Alder 18
Poplar 17
Medium energy yield
Hemlock 17
Spruce 17
Pine 17
Bass 16
Low energy yield
Fir 13
Data provided by Energy, Mines and Resources - Canada
IT IS EXTREMELY IMPORTANT THAT YOU USE DRY WOOD ONLY IN YOUR WOOD
STOVE. The wood must have dried for 9 to 15 months, such that the humidity content (in
weight) is reduced below 20% of the weight of the log. It is very important to keep in mind
that even if the wood has been cut since one, two or even more years, it is not necessarily
dry, if it has been stored in poor conditions; under extreme conditions, it may even rot
instead of drying. The vast majority of the problems related to the operation of a wood
stove are caused by the fact that the wood used was too damp or had dried in poor
conditions. These problems can be:
• ignition problems
• creosote build-up causing chimney fires
• low energy yield
• blackened windows
• incomplete log combustion