Several factors need to be considered when trying to get an effective, clean and economical burn, and by no means are they all obvious. Solid fuel most likely means wood. Domestic bituminous ‘house’ coal sales were prohibited during 2023 in the UK and manufactured smokeless coal is only of minor interest. Also, this means a stove – burning solid fuel in an open fire is another matter entirely.
Log size
The optimum log diameter for efficient burning in most stoves is about 125mm/5”. With around 3/4 of the fuel locked up in a piece of wood, it has to heat up and then vaporise off the surface as flammable gas. The rest of the fuel is mainly fixed carbon or . . .
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