Solid fuel back boilers

Stove or open back boiler

In most cases, using a traditional type of radiant stove with ‘back boiler’ (a water jacket) to feed many radiators is not a good idea, as it will not operate efficiently – using lots of wood and causing lots of smoke. The more hot water is required (e.g. if trying to supply a few radiators and a hot water cylinder), the lower the efficiency will be.

An example of the lowered efficiency is that with a water jacket back boiler added, no traditional wood burners qualify as ‘exempt appliances’ under smokeless zones legislation. This is because by making the stove less efficient, the water jacket will cause more smoke to be given off, including particulate pollution.

Also, the traditional kind of back boilers on log stoves will increase the probability of tar condensing in the chimney, and so of the risks this then poses. it will also exacerbate any problems of low fuel quality.

Traditional can run on logs

Logs are an ideal choice for those that can acquire the fuel themselves, for example from local forestry operations. Wood needs to be seasoned correctly, in other words stored until it has the lowest possible residual moisture content. In addition, a heating water buffer cylinder is required to ensure a continuous supply of heat.

Taking the overall investment and current energy prices into consideration, a wood burning heating system is an economical alternative. Viessmann wood boilers are highly efficient and economical in their fuel consumption.