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Case Study

Heartwood Tree Management

Heartwood Tree Management

  • Biomass district heating & water heating
  • Yearly benefit c. £5,427
  • 20 year benefit c. £108,536
  • Commercial & domestic

The Client

Heartwood Tree Management is a tree management company using the latest arboricultural equipment and techniques. They pride themselves on their commitment to provide a professional and speedy service at all times, whilst maintaining the highest quality of work.

The company takes on all types of jobs from small domestic work to larger commercial projects, all carried out to the highest standards. Heartwood Tree Management also understands the importance of protecting the environment and is committed to minimising the environmental impact of its activities.

The Challenge

Late in 2017, IU Energy were invited to survey Heartwood Tree Management’s main site for the installation of a commercial log boiler to provide highly efficient site-wide heating and hot water, using underground distribution as the means of delivery.

The system specified needed to be a biomass district heating system to supply process heating to the commercial log kiln and provide space and water heating to the adjacent house. The plant room would be housed within an existing building.

The system had to be easy to control and monitor, requiring as little input as possible from its operators. It also had to qualify for the Government’s RHI scheme (Renewable Heat Incentive).

The Solution

At the heart of the proposed district heating system, we installed an ETA SH 60kW log boiler.

The boiler supplies Low Temperature Heating Water (LTHW) to a 3000l ETA accumulator tank via an RHI approved heat meter measuring energy generation. The underground distribution across the site is classified as a deemed heat loss, negating the need for further meters for RHI submissions.

We also supplied and installed a variable temperature export circuit supplying heat to the residential dwelling via a pre-insulated underground heatmain and to the log kiln via above ground pipework.

The ETA touch screen control system we installed operates the boiler combustion and components as well as all the peripheral pumps, valves, sensors and heat meters. This advanced control technology uses data from across the building to calculate and modulate the required heat demand, thus reducing export temperatures throughout the distribution pipework and increasing overall system efficiency. The control systems intuitive user interface is also accessible remotely.

As part of our standard service, IU Energy also completed the RHI application, which was successful.

The Results

The entire system was delivered on-time, within budget.

The system is projected to yield the following results –

  • Total cost benefit over twenty years c. £108,536
  • Total annual cost benefit – c. £5,427
  • System Payback – 6.3 years
  • Projected Return on Investment % – 10.9

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