Hackbridge Primary School

Hackbridge Primary is the UK’s first true net zero carbon school, and the first to be ‘Passivhaus plus’ certified.

Hackbridge is a new build primary school for 420 pupils aged 5-11 built next to the pioneering BedZED One Planet Living development. It is the UK’s first true net zero carbon school (regulated and unregulated), and the first to be ‘Passivhaus plus’ certified.

Careful consideration has been taken to select materials that are healthy, have low embodied energy and be easy to construct and maintain.

To achieve Net Zero Carbon the design applies rigorous Passivhaus building envelope insulation and air tightness requirements, with triple glazed windows that enhance thermal comfort and provide excellent daylighting. Fresh air to classrooms is delivered using heat recovery mechanical ventilation in winter and natural ventilation via opening windows in mid-season.

A highly efficient ground source heat pump system with inter-seasonal heat storage meets space heating demands. To meet summer peaks and provide resiliency against climate change the system can operate in reverse cycle to provide free cooling.

A rooftop PV array provides renewable electricity to offset 100% annual energy demands, with solar thermal panels meeting 80% of hot water needs.

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