Arup, a leading independent technical consultancy firm, undertook an independent appraisal of energy efficiency within the UK schools estate - based on a wide range of published data - to contrast the performance of a "Schoolhaus" building.
Their report concluded:
The schoolhaus building design consumes less energy in operation than it generates through on-site renewables. Therefore, these buildings are able to acheive the highest EPC Asset Rating (A+) and the highest iDEC Opertaional Rating (AO).
An example Schoolhaus building has a more favourable energy performance rating (iDEC Operational Rating) than any other specific site assessment recorded through industry standard benchmarks, even when they ignore the added-value contribution of on-site renewable's. The building's energy performance ratings comfortably surpasses the Department for Education's aspirational target for new school buildings as specified in the DfE's best practise building specification targets of the Pririty Schools Building Programme.
Arup estimate that Schoolhaus (as per study sample) generates more revenue from renewable energy incentives (Feed-in Tariff) than the cost of the electricity consumed over a year., with an annual net income of £500 per 100m2 per year. This compares to average data from the Royal Institution of Chartered Surveyors - which looks at other typical building developments over the last 10 years - showing an average net utility cost of £610 per 100m2 per year for a typical new school building. Therefore Schoolhaus offers a net positive benefit of £1,000 per 100m2 when compared to other benchmark buildings.
Additionally, the Schoolhaus design and specification delivers a net positive generation of renewable energy, thus having an inverse relationship between operational emissions and space utilisation. This means that concerns around contributions towards global warming need not be a motivation for constraining the provision of space to pupils of a Schoolhaus. Such a characteristic should benefit pupil welfare and is in contrast to any other known existing school building in the UK.