What is a biomass boiler?
Biomass boilers can replace existing oil or gas boilers to heat hot water and radiators (or under floor heating). They burn logs, wood chips, wood pellets or other forms of biomass. The most advanced boilers are fully automatic. They control the amount of fuel and air supplied to the combustion chamber. As a result they are highly efficient and emissions are low.
They are fed with wood chips or pellets from a large hopper sited nearby that can in some cases hold fuel for up to a year, minimising transport and delivery costs. Maintenance is minimal – although you will need to clean it and remove the ash about once a month.
Biomass heating systems are permitted development unless the flue exceeds the height of the roof by one meter or more. If you live in a listed building or in a conservation area check with your local planning department whether consent is needed.