The Challenge

Heating and ventilation for 11 classrooms, a hall, a catering kitchen, staffroom and offices, were required. This was to be installed quickly to prevent disruption and with the safety of the children in mind. The new system had to be quiet to allow children to concentrate.

Arley primary School Exterior

The Requirements

The council needed absolute certainty over both the build cost and programme as the project had to meet legal OJEU (Official Journal of the European Union) obligations. The OJEU publishes the costs of tenders from the public sector, which sit above a particular threshold.

Arley primary school somputer room

The solution

Created as a joint venture between Scape and Willmott Dixon, Sunesis is an innovative approach to fixed-cost construction which delivers buildings for the public sector with speed, simplicity and certainty. The process also includes the latest renewable heating system from Mitsubishi Electric with three Ecodan CAHV monobloc air source heat pumps.

For every 1kW of electricity used to power an Ecodan CAHV air source heat pump, it delivers around 3.2kW of heat back to the building. Of that figure, around 69 per cent is renewable energy. As a result, the school qualifies for the government’s non-domestic Renewable Heat Incentive, receiving regular quarterly payments for the next 20 years.

The Sunesis formula provides project guarantees for quality, costs and timescales, ensuring the council stays in line with government dictates for public authority spending.

The renewable heating system is easy to monitor and control, in addition to being low maintenance. It can provide water flow temperatures from 25ºC up to 70°C without boost heaters. The air source heat pumps (CAHV units) guarantee hot water and heating all year round – even when the temperature is below freezing outside.

Arley Primary School CAHV units

The beauty of this approach is that the Local Authority knows exactly what it is getting, when it will be delivered and how much it will cost, right from the start of the process.

Mark Robinson
Chief Executive at Scape