Key Facts


  • Tollard Royal, Salisbury

Project Included

  • 2 x Guntamatic 99kW Biocom boiler system including two 5,000 litre thermal stores
  • Plant room and fuel store in a widened 40ft container
  • Groundworks, laying of underground pipe and full integration into the existing heating system

Fuel Consumption

  • 55 tonnes of wood pellets, per annum (Based on 198kW boiler, in a similar application)

Fuel Cost Saving

  • In the region of £2,000 per annum

CO2 Saving

  • Up to 90 tonnes vs heating oil. (Source: Biomass Energy Centre)

RHI Payments

  • A project of this size would gain an approximately £20,500 every year for 20 years, index linked to inflation

Total Project Price

  • £180,000


  • 9 years (combining RHI income & fuel cost saving)

* To protect client confidentiality, figures are based on an average of several typical projects of this size and all financial information are not specific to this project. Current information on RHI payments is for guidance only, not to be considered a guarantee.

The System:

  • 2 x Guntamatic Biocom 99kW biomass boilers in a widened container
  • Runs on wood pellets
  • Replaces 30-year old oil heating system

The Result:

  • Biomass Fuel Cost Saving: Approximately £2,000 per year
  • CO2 Reduced: Up to 90 tonnes, per annum
  • RHI Payments: A project of this size would gain an approximately £20,500 every year for 20 years, index linked to inflation

Plant Room CAD Drawing Download

Treco installed a 199kW wood pellet biomass boiler for our school. The installation was trouble-free. The engineers were experienced and skilled and met all deadlines. Communication with Treco throughout the installation process was excellent and the company’s representative responded very positively to all our questions and requests. The programme came in on budget and we are very pleased indeed with the end result. We would use Treco again and would recommend the company without reservation.

Chris Stewart, Bursar

Contact us

Sandroyd School - Project Background

Sandroyd School, Tollard Royal Salisbury


Sandroyd is an independent school located in Salisbury.

Sandroyd is very much a forward looking Prep school, well placed to respond to the ever changing demands and expectations of new generations of parents and children, built on a heritage of achieving excellence.

Sandroyd School, Tollard Royal Salisbury

The Challenge

The school was heated by 2 x 250kW oil boilers which were 30 years old. Included within the scope of work was the replacement of the existing oil boilers with one 200kW standby/top up boiler located in the new container.

Treco was responsible for the full integration into the existing system via a  Heat Interface Unit (HIU) including pipework configuration. Treco was also responsible for supplying and installing the underground pipe, we used Uponor Duo for this project.

As this is a school, reliability was a key factor for Sandroyd when deciding on a supplier. Treco worked closely with the school in order to minimise disruption to the site and maintain heating throughout term time.

Sandroyd School, Tollard Royal Salisbury Plant Room Fuel Store Container

Our Custom Solution

Treco tendered and was selected for the design, supply and full turn-key installation of 2 x 99kW Biocom pellet boilers in a widened 40 feet container. This included groundworks, laying of underground pipe and full integration into the existing heating system.

Our solution was a full turn-key installation with a high performing biomass boiler.

Sandroyd School, Tollard Royal Salisbury Plant Room Fuel Store Container

The Incentive

Sandroyd School’s main driver was to increase energy efficiency and reduce their carbon footprint as well as reducing fuel costs and replacing unreliable ageing boilers.

In addition to the increasing the energy efficiency and environmental needs being looked after, the school will also benefit from the Renewable Heat Incentive (RHI) scheme that will see the system generating approximately £20,5000 in payments every year for the next 20 years (index linked).

Taking all of this into consideration, the ROI on this project will be approximately nine years.

Sandroyd School Salisbury Plant Room Fuel Store

Solution Snapshot

Treco‘s design, installation, commissioning and maintenance service included:

  • Fully automated 198kW Guntamatic Biocom biomass boiler system, with automatic ignition.
  • Burns wood pellets, delivered to the boiler by suction system.
  • 5,000 litre thermal store.
  • Electronic control panel, enabling the client to monitor boiler performance.
  • Self-cleaning moving step grate system improves efficiency and allows the boiler to cope with a wide variation in fuel quality.
  • Integration with the existing heating system and automatic de-ashing.
  • Design of system compliant with RHI requirements.
  • Assistance with final RHI application including schematics.
Technical Details

Boiler Specifications:

  • Heat output from 22kW to 99kW.
  • Dimensions: 1,875w x 1,845h x 980d (mm).
  • Weight: 865kg (not including 70kg feed auger).
  • Fuel: wood pellets.
  • Boiler output: perfect modulation at up to 96% efficiency from 22%-100% of output.
  • Boiler temperature: 60-80oC.
  • Return flow temperature regulated to protect boiler.
  • Water capacity: 256 Litres.
  • Operating pressure: Max 3 Bar.
  • Power connection: 230V/16Amp.
  • Flue connection diameter 180mm.
  • Self cleaning heat exchanger.
More Treco Case Studies