The Corn Barn Cullompton

Replacing an inefficient existing biomass boiler that was impacting on the core business with a new Hargassner 100kW wood chip boiler benefiting from the RHI

Biomass Heating at the Corn Barn, Devon.


The Corn Barn is a beautiful wedding and events venue in Devon. The converted barn has underfloor heating and there are also residential properties on site that require heat and hot water.

A unusual Danish biomass boiler that operated on both log and wood chip fuel had been providing heat. The boiler was plated at 100kW, but the system did not work well and gave out much lower heat output than the nominal boiler rating. The lack of heat was impacting on the core business.


Following a technical visit to complete a full site survey and discuss options, boiler layout and other technical issues we provided a quote and layout drawing within 24 hours.

There were options within the quote for benefiting from the RHI (Renewable Heat Incentive). Although the RHI has stopped for new applications, existing tariffs are becoming available which make new installations very economically attractive with short payback periods.

We carried out an analysis of the “100kW” old biomass boiler and measured an efficiency of around 50% and a peak heat output of less than 50kW. Our technical team completed heat load calculations and specified a Hargassner ECO HK 100kW wood chip boiler. One challenge of the project was no 3-phase electricity available on site.  BBSM Ltd specified a solid single phase to 3-phase converter, and this was installed to allow the boiler to run.

Preparation works commenced in late January 2024. The removal of the old boiler was delayed as long as possible to provide some heat to the buildings. The boiler installation was completed and commissioned and providing heat, approximately 72 hours from the boiler arriving on site.


The owners of the Corn Barn were incredibly grateful as they were showing people around the wedding venue on the Saturday. The job was fully commissioned and finished with training and hand over by Tuesday the following week.
Holiday Letting North DevonHoliday Letting North Devon


"The boiler is phenomenal, heated House and Barn on Saturday no problem . Radiators have never been so hot. Thank you. "
Ian Batchelor, Feb 2024

Biomass Services

Biomass Boiler Servicing and Maintenance

Servicing & Maintenance

Biomass Boiler Installation


Biomass Boiler Specification and Design

Specification & System Design

District Heating



Why Choose BBSM?


Experienced Engineers

We have a large pool of engineers with many years of experience within the biomass industry, working on a wide range of commercial and industrial biomass boiler makes.


Nationwide Coverage

We have engineers covering the whole of the Great Britain, and service and maintain projects throughout England, Scotland and Wales.


HETAS accredited

We are fully registered under HETAS MCS040, one of the first companies to be so. Our HETAS registration covers all makes of biomass boiler.

  •  I would just like to pass on our thanks to Peter, for getting our heating up and running last night. He truly went the extra mile, and made sure all things checked out before he left our building. He's a true asset to your company, and I only wished all contractors had the same commitment to there customers. Thank you once again, brilliant service!!!

    Academy- January 2024

  • You have shown us what a good (excellent!) biomass boiler installation looks like. You have become an essential partner in our net-zero aspirations.
    You have set a new standard for heating system efficiency. You have set a new standard when it comes to working collaboratively with suppliers.

    Public sector customer

  • BBSM installed the first of our biomass boilers in 2021. We found the company to be very reliable, trustworthy, and they worked efficiently and to a high standard. Based on our experience, we asked BBSM to install our second, and then our third biomass boiler system.
    We have engaged BBSM to carry our on-going scheduled service and maintenance. I would highly recommend them.

    Industrial customer

  • BBSM's team responded with flexibility and with great professionalism when the scope of the project had to be amended due to circumstances outside of their control, and always demonstrated a solutions led approach.
    We could not be happier with the outcome of the project. The new boiler is delivering significant fuel savings and takes considerably less time from our on site team to maintain. In fact, the project has been so successful we have subsequently contracted BBSM to extend the biomass system to provide hot water to a block of holiday apartments on the same site. I would be happy to recommend BBSM unconditionally.

    Hotel customer

  • BBSM were a professional company to work with. They stood behind their work, and we are very happy with the installation, their continued support, and their level of service.

    Drying customer

Sign Up for Our Mailing List

Sign up today to get news, updates and the occasional offer