VENTILATION AND INFILTRATION - AIVC

I l r I CHAPTER22 VENTILATION AND INFILTRATION VENTILATION Requirements; Types of VENTILATION ; Driving Mechanisms for natural VENTILATION and INFILTRATION ; natural VENTILATION ; lnjiflration and Air Leakage; Air Leakage Sources; Empirical Models,- INFILTRATION M easurement 0 UTDOOR air that flows through a building either in-tentionally as VENTILATION air or unintentionally as INFILTRATION (and exfiltration) is important for two reasons. Dilution with outdoor air is a primary means of control of indoor air contaminants, and the energy associated with heating or cooling thjs outdoor air is a significant, if not a major, load on the heating and air-conditioning system. Thus a knowledge of the magnitude of this air flow is needed for maximum load conditions to properly size equipment, for average conditions to properly estimate average or seasonal energy consumption, and for minimum conditions to assure proper control of indoor contaminants. In larger buildings, knowledge of VENTILATION and INFILTRATION flow patterns is also important for assessing VENTILATION effectiveness, and smoke circulation patterns in the event of fire.

controlled natural ventilation. Infiltration is that flow of air through cracks, interstices, and unintentional openings due to the pressure of wind and the buoyancy effect caused by dif· ferences between the indoor and outdoor temperatures. Con­ trolled natural ventilation is that which is due to openable windows and doors.

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  Ventilation, Natural, Infiltration, Natural ventilation, Ventilation and infiltration

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