Ventilation System Requirements - General Terms

In general terms, the requirement may be achieved by providing a ventilation system which – (a) extracts water vapour from areas where it is produced in significant quantities before it becomes widespread (e.g. kitchens, utility rooms and bathrooms); (b) extracts pollutants which are a hazard to health from areas where they are produced in significant quantities before they become widespread, (e.g. rooms containing processes or activities which generate harmful contaminants); (c) rapidly dilutes pollutants and water vapour produced in habitable and occupiable rooms and in sanitary accommodation, when necessary; (d) makes available a minimum supply of outdoor air over long periods for the comfort of occupants and to disperse residual pollutants and water vapour when necessary. Such ventilation should minimise draughts, be reasonably secure, provide protection against rain penetration, limit the amount of heat lost and take account of heat recovery where appropriate; (e) is designed, installed and commissioned to perform in a way that is not detrimental to the health of the people in the building; and (f) is installed to facilitate maintenance where necessary.