Efficient natural ventilation…

396 Efficient natural ventilation gives flexibility in the choice of heating equipment Helpful information on this and other aspects of the problem of securing efficient services for MODERN STANDARDS OF VENTILATION necessitate the pro- vision of flues or ventilating shafts, the installation of which must be co-ordinated with the general structure of cooking, hot water, space heat- the building. Gas Undertakings have of necessity may be considerable study of flue construction and early consulta- obtained from the local Gas Undertaking.