28
Wood species
Energy yield
(millions of BTU/cord)
High energy yield
Oak
29
Sugar Maple
28
Beech
26
Yellow birch
25
Ash
24
Elm
23
Medium energy yield
Larch (Tamarack)
23
Red Maple
23
Douglas red fir
23
Silver birch
22
Alder
18
Poplar
17
Hemlock
17
Low energy yield
Spruce
17
Pine
17
Bass
16
Fir
13
Data provided by Energy, Mines and Resources – Canada
TABLE 3.2 Energy yield for wood species
3.2.1
The use of manufactured logs
There are numerous types of manufactured logs sold on the market. You must be very careful
with this type of product. Many brands of manufactured logs contain chemical additives. DO
NOT BURN ANY MANUFACTURED LOGS CONTAINING CHEMICAL ADDITIVES. If
you do, you may damage your stove and void the warranty. Logs containing chemical additives
burn a lot hotter and were designed for decorative fireplaces. Decorative fireplaces generally
have larger, cooler, and less air-tight fireboxes. Your E.P.A Enerzone stove, on the other hand,
has a smaller, completely sealed firebox which attains much higher temperatures. It is therefore
not designed to support excessive heat caused by the addition of chemicals in manufactured logs.
Manufactured logs made of 100% wood residues do not cause any threat to your stove. You
must however be careful. Manufactured logs typically release a much larger heat output over a
short period of time. Therefore, you cannot place a large quantity of such logs into your stove,
like you would with regular cord wood. Start with one log, and gradually increase the load to 3
or 4 logs and see how your stove reacts. Use a chimney (flue) thermometer and make sure that
temperatures remain within the normal operating range.
