Yukon LWO-112, Owner'S Manual

Page: 42 / 68

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BEST WOOD TO BURN
All solid fuel, whether it is coal, pine, oak or any grain
has about 12,000 BTU's per pound if its moisture
content is zero. Wood that has been cut, split and air
dried for 2 years has about 8,000 usable BTU's per
pound. Hardwood such as oak or hard maple has
nearly twice the BTU's per cord as pine or aspen
because it is nearly twice as heavy.
Freshly cut wood has about 50% moisture content.
Wood that has been cut and split for 2 years has about
20%. Wood must reach at least 435º to ignite. High
moisture content wood does not allow the gases in
wood to get hot enough to provide complete
combustion, thereby creating smoke and creosote,
which is usable energy, but wasted because of
incomplete combustion.
Yukon furnaces are designed to wring the most energy
possible from each log. Your furnace is designed to
allow the primary air under the grate to create the
initial burning. As the wood burns, gases, which
contain 40% of the energy in the wood, escape
to the top of the flame. The patented secondary air
system (the round tubes between the firebrick) draws
room air into the tubes and provides oxygen to the
firebox to burn these gases. The result is you will use
up to 75% less wood than stoves, furnaces or outdoor
boilers without these features.
FIG. 32
FIG. 33
Type
Pound
Weight
per Cord
BTU’s
per Cord
Air Dried
Wood
Equivalent
Value #2
Fuel Oil
Gallons
White Pine
Aspen
Spruce
Ash
Tamarack
Soft Maple
Yellow Birch
Red Oak
Hard Maple
Hickory 1800
1900
2100
2900
2500
2500
3000
3250
3000
3600 17,000,000
17,500,000
18,000,000
22,500,000
24,000,000
24,000,000
26,000,000
27,000,000
29,000,000
30,500,000 120
125
130
160
170
170
185
195
200
215
42
Operating Instructions