Mar 19, 2010
The fireplace works on exactly the same principle as the campstove, with a fan drawing air in through the holes round the outside of the base, and injecting a small amount through holes in the base of the combustion chamber:The limited amount of air, combined with the heat of the fire, results in the wood being gasified, to produce a mixture of carbon monoxide, methane and hydrogen (known as woodgas), which is then ignited when it reaches the much larger airflow coming in through the holes in the top (don't worry, all the CO is burned, no risk from the woodgas):There are a few small differences between the fireplace and the campstove. The campstove had two power sockets - high and low - and ran from a pair of AA batteries. The fireplace can take a 9-12V supply, so can run directly from a lead-acid battery, or eight smaller batteries in a pack. However, it is supplied with a mains adaptor, as many people will be using it in the garden, hopefully to replace one of the nasty fossil-fuel burning patio heaters! The fan in the stove only uses 2W of power, while the heat from the stove can reach 16kW (55,000 BTU of Heat)! The fireplace also has a knob to vary the airflow, although you'll normally only use anything less than maximum while lighting it.
The fireplace also has handles added to the side. These stayed cool even after an hour of operation, allowing you to move the stove (carefully!) after you've unplugged it without waiting for it to cool down. If you want to buy one, go to http://www.woodgas-stove.com/catalog.php