Twenty Monodraught Sunpipes and eight Sola-boost natural ventilation units with an 8-zone iNVent natural ventilation control system that monitors and controls the Sola-boost (as set out on page 28) units have been installed. The Sola-boost systems were chosen as part of a thermal model for the building, to work in tandem with the underfloor heating. If sensors detect that temperatures and/or CO2 levels in the classrooms have exceeded maximum pre-determined settings, the Sola-boost units automatically respond by bringing in fresh, natural air from the outside.