How do Biomass heating systems work?

There are two main ways of using biomass - which 98% of the time will be wood- to heat you home:

  • A standalone stove burning logs or pellets to heat a single room. Some can also be fitted with a back boiler to provide water heating as well.

  • A boiler burning pellets, wood chips or logs and connected to a central heating and hot water system.

Whilst log burning stoves and boilers have to be filled with wood by hand, our pellet and chip burners can use automatic fuel feeders which refill them at regular intervals which means the system can be almost totally automated,

Generally, wood pellets or other biomass products are augured into a chamber where an electric probe ignites the material. A microprocessor then monitors the combustion via thermostats in the flue gasses as a result adjustments are made automatically to the fuel supply and the fan speed (the air being blown into the combustion chamber).

Hot flue gasses are then passed through a heat exchanger, so that heat is transferred from the combustion gasses to the water used in the central heating system. The hot water is then circulated around a standard central heating system.

The diagram below shows a cutaway of a typical automatic pellet feed boiler

How Biomass Boilers work

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