Energy conservation by regulation of the central mechanical ventilation in high-rise buildings - realistic or not

Describes an investigation to see what energy saving can be achieved by the regulation of mechanical ventilation systems in high rise buildings. Measures air leakage in a block of flats, and uses a calculation model to predict the amount of energy lost due to ventilation in various situations. Concludes that the reduction of ventilation has no disadvantageous consequences for the operation of the system, and that the extracted air flow is affected more by incorrect adjustment of extractor vents then by opening windows, regardless of the setting of the ventilator. Extra energy loss due to several open windowsappears to be greater then the energy saving possible by reducing the ventilator speed.