Recommendations for designing for the natural ventilation of buildings for human occupation. Reasons for the provision of ventilation and, where possible, recommends quantitative air flow rates. The basis for the choice between natural and mechanical ventilation and guidance on the design of natural ventilation systems.Cross References:BS 2869BS 5250BS 5410:Part 1BS 5410:Part 2BS 5440:Part 2BS 5588BS 5643 BS 5720BS 6100BS 6230BS 6375:Part 1 BS 8207BS 8303CP 3:Chapter V:Part 280/779/EEC85/203/EEC