BUILDING PERFORMANCE
New Build of the Year (Value up to £5m) Bushbury Hill Primary School, Wolverhampton
Sponsored by:
The challenge The brief for Bushbury Hill Primary School in Wolverhampton was for a one-form entry primary school for 210 children, built to the Passivhaus standard. The build included a 30-place nursery and facilities for a multi-agency support team.
The response Based on a timber-frame construction, the building uses locally sourced brick cladding, linoleum and recycled tyre barrier matting fl oor fi nishes, and non- toxic paints and stains. There is a mechanical ventilation heat recovery system for winter operation, with a simplifi ed heating system, run off one domestic boiler, to supply heat when necessary to radiators. In winter, occupied spaces are ventilated using a thermal ventilation heat recovery system, with effi ciency of 80%. In summer, openable windows provide natural ventilation. Building orientation and south-facing
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glazing has been optimised to take advantage of natural light, reducing the need for artifi cial lighting. Brise soleil sun shading and roof overhangs protect the building from overheating and east and west-facing glazing is kept to a minimum. Daylight and occupancy sensors are used to automatically dim and turn off lights.
The results Bushbury Hill Primary School has achieved the Passivhaus standard within budget and with no additional funds for low-carbon and energy effi ciency measures. The building has an air pressure
reading of 0.53 ach@50pa (building regulations require a maximum air pressure of 10 ach@50pa). Its heating and cooling demand of 15Wh/(m2
a)
meets the Passivhaus target. The design has helped to dramatically
reduce energy bills – approximately 80% less than that required in UK Building Regulations.
It is great to gain recognition for reducing energy consumption by design, rather than offsetting carbon with ecobling!
Measured performance
Energy use based on winter monitoring: Thermal energy: 15kWh/(m2 How water: 12 kWh/(m2 Lighting: 14 kWh/(m2
a) – gas a) – gas a) – electric
Combined power and plant: 14 kWh/ (m2
a) – electric
Kitchen: 7 kWh/(m2 Sprinklers: 17 kWh/(m2
a) a) – electric a) – electric
Heating and cooling demand: 15kWh/(m2
March 2013 CIBSE Journal 33
2013 Winner
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