Ashley AF700, Owner'S Installation And Operation Manual

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22
TYPE WEIGHT
(LBS. CU. FT., DRY)
PER CORD EFFICIENCY
RANKING
SPLITS MILLIONS
BTU’s/CORD
Hickory 63 4500 1.0 Well 31.5
White Oak 48 4100 .9 Fair 28.6
Red Oak 46 3900 .8 Fair 27.4
Beech 45 3800 .7 Hard 26.8
Sugar
Maple
44 3700 .6 Fair 26.2
Black Oak 43 3700 .6 Fair 25.6
Ash 42 3600 .5 Well 25.0
Yellow Birch 40 3400 .4 Hard 23.8
Red Maple 38 3200 .3 Fair 22.6
Paper Birch 37 3100 .3 Easy 22.1
Elm/
Sycamore
34 2900 .2 Very Dif fi cult 20.1
Red Spruce 29 1800 .1 Easy 16.1
It is EXTREMELY IMPORTANT that you use DRY WOOD only. The wood should 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 for one, two or even more years, it is not necessarily dry, if it has
been stored in poor conditions. Under extreme conditions it may rot, instead of drying. This point cannot be over
stressed; the vast majority of the problems related to the operation of a wood furnace is caused by the fact that
the wood used was too damp or has dried in poor conditions.
These problems can be:
• Ignition problems
• Creosote build-up causing chimney fi res
• Low energy yield
• Blackened windows
• Incomplete log combustion