Key points concerning the design: + Good fuel economy as a result of distributed heating plant. + Underfloor heating provided for low return temperatures, allowing optimum operation of condensing boilers. + Ventilation control in classrooms based upon occupancy schedule and PIR detectors. The school has a high facade/floor area ratio, which can increase heat-loss, but usually facilitates passive design and natural cross-ventilation. All spaces within the building are heated by an underfloor system supplied by distributed plant with three 60 kW condensing boilers in villages A-D, and five 60 kW condensing boilers in village E. Each manifold is linked to a temperature sensor, which controls a bypass valve as room temperature increases. The heating circuits are compensated, supplying lower temperature hot water as external temperatures increase. The BMS system also has optimum start/stop controls, avoiding unnecessary heating when the building is unoccupied. In the zones exposed to external noise, incoming air is tempered by a low-pressure hot water heater battery whilst, for other zones, supply fans include an electrically heated element.