Since the dawn of time, man has been using wood to heat buildings with and it is still the most carbon friendly method available.  The technology for burning wood has improved considerably and the efficiencies of wood boilers can now match those of condensing oil and gas boilers.

The are three wood fuels to chose from; pellets, chips or logs. Pellets provide the most convenient heating source as the boilers can be fully automated, they simply require the pellet hopper filling every week or so and the ash clearing every 2-4 weeks. They can be fitted in place of a conventional oil/gas boiler provided there is a chimney available.  Chips are also hopper-fed and are suitable for large installations.  Logs probably provide the most cost effective heating solution available, if you have woodland on your property that requires management, then your fuel source can be free.  Log boilers require a large thermal store (a cylinder, about 2m in diameter and 2m tall) to store the heat from logs and will need loading once or twice daily and the ash cleaning regularly.  We are also able to offer combi log boilers that can be fed either by logs or pellets, these offer a convenient compromise between the simplicity of pellets and the cost effectiveness of logs.

Biomass boilers produce high temperature heat that can be used to directly replace oil and gas boilers to feed radiator heating systems. By including weather compensated heating controls a very efficient heating solution can be provided. Biomass is very well suited to work with solar thermal which can take the strain in the warmer months.

The UK government has introduced the RHI scheme to encourage the switch to heat generated by renewable sources. This subsidy applies to qualifying biomass installations:

  • Up to 7.9p paid per kWh of useful heat
  • Heat output to be metered and the support calculated from the amount of eligible heat, multiplied by the tariff level
  • Tariff is dependent on the size of boiler
  • Installations over 45kW do not require certification under the Microgeneration Certification Scheme (MCS) to qualify
  • Payable to owner of the equipment
  • Payable on a quarterly basis, guaranteed for 20 years
  • Immediate eligibility (equipment commissioned on or after 15 July 2009).
Tariff (based on OFGEM guidance, issued June 2011)

Tariff name Eligible size Tier 1 rate
(pence/kWh)
Tier 2 rate
(pence/kWh)
Small biomass Less than 200kWth 7.9 2.0
Medium biomass 200 kWth and above; less than 1,000 kWth 4.9 2.0
Large biomass 1,000 kWth + 1.0