High power, low-emission commercial boiler

Are you looking to reduce energy costs and greenhouse gas emissions, while getting paid for doing so? Look no further! With Dunster biomass heating systems businesses can expect significant financial savings in a number of ways.

Commercial buildings that are either off the gas grid or use oil as their primary source of heat, with a high demand for heat in particular will benefit from our heating systems. In addition, the Government’s RHI energy subsidy, means you can gain income from installing one of our biomass boilers.

Financial benefits

Under the government Renewable Heat Incentive (RHI) scheme, a biomass system can provide a valuable income stream.  Biomass schemes receive tariff payments for each kWh of eligible heat generated. These payments are guaranteed for 20 years and index-linked to RPI:


Small biomass heating Installation (up to 200kW)

Medium biomass installations (from 200kW to 1MW)

Tier 1 payment*
*The tier one payment applies for 1,314hrs × the installed capacity

3.62p per kWh

5.24p per kWh

Tier 2 payment

0.96p per kWh

2.27p per kWh

RHI Income examples for Tier one usage:

Boiler size

Potential RHI income







Biomass is also broadly competitive, and in many cases cheaper than fossil fuels – this is particularly so for wood chip systems when compared with Oil, LPG or Electricity:


Price per unit

kWh per unit

Pence per kWh

Wood chips (30% MC)


3,500 kWh/t


Wood Pellets

£210 per tonne

4,800 kWh/t


Natural Gas




Heating Oil


10 kWh/ltr


LPG (bulk)


6.6 kWh/ltr






Benefits to your Business

  • Increased savings: Wood chip can deliver heat at between 1.5 - 3.5p kWh, versus oil or LPG at 3.5p kWh and electricity at 11p+ kWh.
  • Reduced environmental footprint: great for your corporate social responsibility.
  • 20 years of RHI Repayments guaranteed.
  • Biomass heating systems help to meet green credentials and can help towards achieving planning permissions.
  • Attractive payback and return on investment, offering a return on capital of between 5%- 25%.
  • Reduced risks associated with fluctuating fossil fuel prices.
  • Good PR: Going green delivers a positive message to all stakeholders, and supports local employment in the wood fuel supply chain.

Need help funding your biomass boiler?

Dunster has teamed up with an investment partner to offer a unique funding facility for biomass installations qualifying for the non-domestic RHI.

The CRC Energy Efficiency Scheme

The CRC Energy Efficiency Scheme is a mandatory carbon emissions reporting scheme that covers large public and private sector businesses in the UK. It targets any businesses that are using more than 6,000 MWh of electricity a year; the business must have at least one half-hourly meter installed.

The scheme requires businesses to purchase carbon credits for every tonne of carbon they emit as per their reported usage of gas and electricity. By choosing Dunster you can reduce your business’s energy usage and therefore the amount of credits you have to purchase. It’s a win-win.


The Energy Saving Opportunity Scheme (ESOS) regulation requires large companies to conduct a mandatory energy audit every 4 years. You are categorised as a ‘large organisation’ if you fall within certain parameters.

Failure to comply with ESOS can lead to a fine of up to £50,000 and public disclosure of non-compliance.

Biomass can provide a solution to issues highlighted in the energy audits and can demonstrate steps being taken by the business to reduce carbon based energy.

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