Frequently Asked Question

  • What size is a heat pump unit?

    Typically about the same size as a large fridge if the heat pump is for normal domestic use.

  • Can I burn wood in a smokeless zone?

    Many biomass systems are approved for use in smokeless zones, as long as the appliance has an Exemption Certificate. A full list of companies which make boilers and stoves with Exemption Certificates can be found here.

  • Where is a biomass boiler fitted in a house?

    A biomass boiler that could heat a 2/3 bedroom house needs two metres cubed of space and should therefore fit where your current boiler is placed. If there is no space here for the hopper, some models allow for this to be positioned elsewhere in the house.

  • How does a biomass system compare with my existing open fire?

    Fuel used in open fires or wood stoves burns very inefficiently giving off polluting smoke high in carbon emissions and wasting up to 85% of the resulting heat up the chimney.

  • Do biomass boilers emit smoke?

    Modern appliances emit minimal smoke and are considered to be clean, cost effective heating systems.

  • Does a biomass boiler need regular maintenance?

    Yes they need regular maintenance but only every 800 hours of actual operating time when it is firing. This service is a lubricating service only. After 2400 hours a biomass boiler will need a full service but even a large institution would probably only use this many firing hours each year.

  • Is wood fuel such as wood chips and pellets considered ‘clean fuel’?

    Wood chips and pellets give off no harmful by-products and modern burning appliances emit very little smoke. The flue gas is smoke-free and the ash content is minimal. Clean wood ash also makes excellent fertiliser.

  • Are wood pellets expensive?

    If you buy wood pellets in large amounts then they can prove cheaper than other fuels but it depends also on how near you are to a source and how your local scheme is run.

  • Does the use of fuel for biomass boilers damage woodland?

    No. Wood taken from sustainable, managed woodland can be harvested indefinitely. Managing woodland properly results in surplus wood that would otherwise have to go landfill, so selling it generates income for woodland management and avoids waste.

  • Is wood fuel ‘Carbon Neutral’?

    Yes it is if you look at the overall nature of a sustainable wood supply. Wood fuel is regarded as ‘carbon neutral’ because carbon dioxide (CO2) is taken from the atmosphere and used by trees to grow. When these trees die and decay or are burned, this CO2 is released back into the atmosphere. In sustainably managed woodland, wood is generally never removed faster than it is replenished by new trees. Therefore the CO2 released when the wood fuel is burned is never more than the CO2 being absorbed.

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