Wood wastes are sold by the ton or cord. A ton
of dry sawdust as received from a furniture
manufacturer will have a heat equivalent of 100
gal. of fuel oil (about 14 MBtu). If sawdust or chips
are green as they come from a sawmill or chipping
operation, their heat value is about 50 gal. of fuel oil
(7 MBtu) per ton. A cord of air-dried hardwood, cut
at least 12 months before use, equals 240 gal. or, if
fresh cut, about 150 gal. per ton (33.6 and 21 MBturespectively). These are heat values before furnace
efficiency is considered. Prices vary widely and are
affected by heat value, distance hauled, availability,
and value for other uses.