
The Mynydd Isa Campus was commissioned to serve 1,300 pupils while achieving net-zero carbon in operation, a BREEAM Excellent rating and 25‑year performance resilience to a +2°C future climate change scenario.
Standard compliance modelling could not reliably predict long‑term energy use, unregulated loads or the effectiveness of natural/dual‑mode ventilation needed to avoid mechanical cooling. Uncertainty around occupant behaviour and build quality variations (airtightness, commissioning) also threatened the ambitious carbon and comfort targets.
What the judges said
“An outstanding application of technology to achieve genuine net-zero carbon in operation. The project sets a benchmark for simulation-led design in education, delivering measurable benefits.”
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