Blegberry Farm, North Devon

Project Included

  • Lindner & Sommerauer 150kW Wood Chip boiler including flue system.
  • 4000 litre Thermal Store.

Fuel Consumption

60 tonnes of wood chips per annum. (Based on 100kW boiler, in a similar application)

Fuel Cost Saving

Wood Chips; 50-80%. (Source; Biomass Energy Centre)

CO2 Saving

Up to 96% or 55 tonnes vs heating oil. (Source; Biomass Energy Centre)

RHI Payments

A project of this size would gain approximately £18,000 every year for 20 years, index linked to inflation.

Total Project Price


Payback Period

4-5 years (combining RHI income & fuel cost saving).

(*Financial information not specific to this project – figures are based on an average of several typical projects of this size. Current information on RHI payments for guidance only, not to be considered a guarantee).

Project Summary

Rainbow Heat and Power’s complete installation, commissioning and maintenance service included;

  • Lindner & Sommerauer 150kW Wood Chip Boiler System.
  • Fully automated fuel delivery.
  • 4,000 litre Thermal Store.
  • Installation of stainless steel flue, accessories and connections.
  • Automatic de-ashing.
  • Installation into the refitted boiler house.
  • 156 metres of Uponor Thermo Twin Insulated Underground pipework
  • 5m agitators.
  • An RHI approved heat meter which records heat use in kWh (on which RHI payments are based) complete with certification.
  • Assistance with RHI application including schematic drawings.
  • Commissioning, programming and end user training.


Blegberry the only fortified farm in Devon is a working farm with a mixture of sheep, cattle and arable and is open to the public. The farm is situated near the historic village of Hartland. The farm has a number of holiday cottages offering luxury self-catering holidays.

Technical Specifications

SL 150 Biomass Boiler System



Maximum Heat Output kW 150
Minimum Heat Output kW 41.9
Min. Combustion Efficiency % 91.8
Max. Combustion Efficiency % 93.8
Width mm 1,050
Depth mm 1,465
Height mm 1,810
Flow & Return Diameter


Flue Connection Diameter mm 250
Flue Connection Height mm 650
Boiler Weight (Assembled) kg 1,405
Auger Weight kg 85
Water Content Ltr 340
Power Consumption A/ V 16/ 400

The Requirement

Rainbow Heat and Power were briefed to design, supply, install, commission and maintain a highly efficient and fully automated system.

The system would be required to heat the main farm house, which includes an attached holiday let, 4 detached holiday cottages and grain dryer via a district heating system. The system is to be run on wood chip or pellets.

The fuel store is to be placed in a newly constructed barn.

Complete Biomass Heating Package

Rainbow Heat and Power designed, supplied, installed and commissioned a 150kW Lindner & Sommerauer Wood Pellet Biomass Boilers system.

This was a turnkey project with Rainbow Heat and Power overseeing the whole project. The district heating system used 156 metres of underground insulated pipe and includes a 4000 litre Thermal Store.

For automated fuel delivery to the boiler a 5m agitator was fitted.

Financial Benefit

As well as delivering fuel cost savings of 50-80% the installation will be accredited to the Renewable Heat Incentive (RHI), receiving payments for the next 20 years.