1.  What is a wood pellet boiler?

Answer: A wood pellet boiler is a boiler designed to burn wood pellets classed as biomass.  


  2. Can a wood pellet boiler be connected to my existing heating system?

Answer: Yes, in much the same manner as any other boiler.



  3.  How is a wood pellet boiler controlled?

Answer: A Green Energy Engineering (G.E.E.) wood pellet boiler is controlled by the property heat demand just as with fossil fuelled boilers.


  4.  Do I need another boiler as a back-up?

Answer: No a G.E.E wood pellet boiler does not require a backup system.


  5.   How much electric will I use in comparison to other boilers?

Answer: The G.E.E Slimpel/Propel range are very energy efficient and have a very small electricity demand. (Less than 0.5 amps on average)


  6.  Do I need a buffer tank

 Answer: The G.E.E boiler range has the capability of maintaining high output efficiency during operation at the same level with or without a buffer tank, therefore in the majority of installations no buffer tank is required. The G.E.E. boiler range has been designed to modulate from highest power output to lowest without loss of efficiency, monitoring the return temperatures, flue gas temperature and heat output demand. This data provides the real time logic needed to activate modulation (slowing heat output and reducing fuel consumption), monitoring and adjusting demand every 15 seconds whilst maintaining optimum efficiency, gradually combusting all fuel within burn pot in preparation for automated cleaning and shut down. Depending on commercial installation the addition of a buffer tank may be requested and/or preferred.


   7.  What maintenance does a wood pellet boiler require?


  • G.E.E Commercial boilers (21-99kW) must be serviced twice annually or every 90,000kWh's
  • G.E.E. domestic boilers (5-40kW) must be serviced annually or every 45,000kWh's



  8.   What sort of fuel can be burned in a G.E.E wood pellet boiler?

Answer: G.E.E only recommend EN-Plus standard wood pellets for a variety of reasons, mainly the EN stamp guarantees that the fuel comes from a renewable sustainable source and is therefore green fuel. It also gives you guaranteed calorific burn value ensuring you have value for money.


  9.    Who can supply wood fuel?

Answer Anyone who stocks EN stamped wood pellet. See stockists on-line:



  10. How much fuel will I need?

Answer: As with any heating system the amount of fuel required will depend on the size of the property and its heat demand. The easy way to calculate how much fuel you require is to remember that for every 500ltrs of oil the same equivalent in pellet is 1Tonne of EN-Plus stamped pellet.


  11.  How will my fuel be delivered?

       Answer: Fuel can be supplied in 10kg bags of pellets (15 & 20kg bags are also available), or they can be delivered by lorry in bulk.



  12.  Where do I store wood fuel?

Answer: The bags of fuel can be stored in any dry shed or building. There is a hopper on the side of the G.E.E wood pellet boiler which is suffice in most domestic homes.  On some occasions a larger pellet store will be required in this case fuel can be blown in, up to 20m, from the delivery vehicle.


Regulations, Planning, Building Warrants and Emissions

  13.  Do I need Planning Permission and/or a Building Warrant to install a biomass system?

Answer:  While Planning Permission is not required for a boiler, it may be required for a boiler house, and flue (chimney). It may also be required for any aspect of an installation where historic buildings are involved or in sensitive locations. If you are installing a domestic boiler you can obtain the buildings regularisation form from our website, you will be required to submit this form to building control who will carry out the installation inspection. (This form is for Northern Ireland only and is available from your local Building Control Office)


  14.  How do I apply for Planning Permission?

Answer:  Contact your local building authority.


  15.  Can I install a G.E.E wood pellet boiler in an Air Quality Control Area? 

      Answer Yes.



  16.  How do I dispose of the ash which is produced?

Answer:  The volume of ash generated in every 1000kg (1tonne) will only be approx. 0.7% or less (<7kg).  The ash produced from wood pellet boilers is high potash which makes the ash valuable as a top dressing by farmers, as a component of composts by horticulturalists or can be disposed of in your local council food waste bin.

Finance, Grants & Incentives

  17.  Is a wood pellet system expensive?

Answer The G.E.E Propel & Slimpel range are manufactured from the top end materials and latest technology delivering to the end user at a very competitive price.  If they are compared like for like with other biomass boilers they would be very difficult to beat on cost.



  18.  Are there any Grants available?

Answer: Yes the Renewable Heat Incentive (RHI)

The Renewable Heat Incentive (RHI) is the world’s first long-term financial support programme for renewable heat.  The RHI pays participants of the scheme that generate and use renewable energy to heat their buildings. By increasing the generation of heat from renewable energy sources (instead of fossil fuels), the RHI helps the UK reduce greenhouse gas emissions and meet targets for reducing the effects of climate change


There are two parts to the RHI:

  • Domestic RHI – The scheme is open to homeowners, private landlords, social landlords and self-builders.
  • Non-domestic RHI – launched in November 2011 to provide payments to industry, businesses and public sector organisations.


The RHI is the main scheme of our heat strategy and payment will be made based on per kilowatt hour (kWh) of heat produced.


  19.  Are there any Government loans for businesses installing biomass systems to help with the upfront cost of the technology?

Answer: The Carbon Trust operates an interest free loan scheme to businesses repayable over 5 years. Information, and an on-line loan calculator, can be found on the Carbon Trust website: http://www.carbontrust.co.uk/energy/takingaction/about-loans.htm.



  20.  What payback period can I expect on my biomass system?

Answer: With the RHI scheme launched the payback can be as quick as 30 months on a G.E.E wood pellet boiler as our systems are competitively priced.


  21.  What is the costs of Wood Pellets?

Answer:  Wood pellet, cost consistently 30% less than fuel oils.



  22.  How do I ensure consistent fuel quality?

Answer: Only use EN-Plus stamped wood pellets.









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