In article , Janet
Baraclough.. writes

Also take care with burning joiners offcuts or demolition scavenges.
Sometimes old reclaimed wood has been treated for worm or rot with toxic
chemicals whose smoke I wouldn't want to breathe, some of it has been
kilndried, and some of it is coniferous softwood. Kilndried offcuts burn
so hot and fast it's hard to keep a pleasant steady heat in the room.
Softwoods tend to tar the chimney, which can be a fire hazard.

Janet.


Good advice Janet, we've found it true in both cases
Janet
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Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk