Design assessment for naturally ventilated buildings

If this criterion (given in the provisions in paragraph 2.70) is satisfied in the context of a naturally ventilated building, it is not evidence that the internal environment of the building will be satisfactory, since many factors that are not covered by the compliance assessment procedure will have a bearing on the incidence of overheating (incidental gains, thermal capacity, ventilation provisions, etc.). Therefore the developer should work with the design team to specify what constitutes an acceptable indoor environment in the particular case, and carry out the necessary design assessments to develop solutions that meet the agreed brief. Some ways of assessing overheating risk are given in the CIBSE TM37 Design for improved solar shading control and, for education buildings, in Department for Education and Skills' BB101 Ventilation of school buildings.