FireBird Bio-Tec Manual page 11

The impact of moisture (cont.)
• The moisture content of wood fuels is influence by
the climatic conditions, the time of year, tree
species, the part of tree stem and by storage phase.
– Freshly cut Hardwoods
– Freshly cut Softwoods
• One summer seasoning reduces the moisture
content by 10 to 15%. For the Irish climate two years
drying is recommended
• On a wood gasification boiler moisture content
should be 20% or less; and never over 25%
• Moisture measuring devices are
available, e.g. Testo 606 series
40% and 50%
50% and 60%.