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Hi I have 2 dead elm in the garden, both about 18m tall, both with the bark peeling off, so should be reasonably dry. Given their diameter, I reckon there is about 16tonnes of timber there. So the questions are. 1) how many m3 loose will that likely produce, if split into 12 inch long sections, typical size for burning in stoves. From that I can work out what it will be worth if I process and sell it myself And 2) what is it worth to a firewood dealer, once it is felled and cut into metre long lengths. So they would collect the wood in that state. I prefer burning Larch in our boiler, it takes less time to light, so may even do a trade. But need to know my starting point for negotiation. Thank you for your help. Regards Derek

The mrs kit the boiler and swears it was switched on and in gasi mode. We went out and I went to check it. I found it wasn't switched on and the lower chamber covered in black pitch with the heat exchanger pipes looking filthy. Question is, how screwed is it likely to be?

Can the briquettes be used in gasification boilers then? if so, in what ratio to logs?

Thanks for the responses guys. Really helpful and reassuring. we have a bit of woodland with a number of dead trees standing waiting to be felled. We hope those will be dry enough to be used next winter as they have been standing dead a few years. We also have space to let a good 30m3 of timber dry over a year or two. It's more the short term that concerns us, finding enough dry wood for the rest of this year and also, our heat exchanger tubes clogging up. I have no idea how effective the handle on the side of the boiler is at cleaning those. As has been mentioned, we have also have a lot of pitch in the top chamber. at the moment, very little in bottom chamber, only a trace by the door. once i have the ember layer and add in the dry hardwood it will gasify straight away. in terms of ash, I could maybe fill a bucket with ash after 2 weeks of burning. When I look at the what's at the bottom of the flue, I doubt I could fill a tea spoon with what is there after a months use.

I have recently installed a wood gasification boiler, and what with the wet summer we had last year there was not much seasoned timber around, so when we found a supplier who had kiln dried hardwood, so we went with that. We discussed it with the installer who measured it with a moisture meter at 13-16%. The firewood was supplied In sections about 8 inches long and about 4 inches across typically. Some a bit more and some a bit less. Today a took my axe and split one of the larger bits and found the mc to be 36% in the very centre, falling back to the mid teens at the edges. So my question is, how are you ever to know for sure that what you are burning is dry enough, without cutting it up into matches? I have found traces of pitch in the lower chamber by the from door, but nowhere else. There is quite a bit of pitch in the upper chamber. I am a bit concerned we may have reduced the efficiency of our boiler. When it was installed I recall watching the temperature gauges in the accumulator tanks rise so quickly you could see the needle moving. That is not now the case.