AIVC - Air Infiltration and Ventilation Centre

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Frequently Asked Questions


This section answers some frequently asked questions for those who require a background knowledge to ventilation.


As an additional reading, the AIVC suggests its’ handbook, "A Guide to Energy Efficient Ventilation", which reviews ventilation in the context of achieving energy efficiency and good indoor quality.


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Various units are used to describe the rate of ventilation. These include:   Volumetric flow rate: Ventilation and air infiltration is commonly expressed in terms of a volumetric air flow rate e.g. litres/s (l/s) or m³/s.  
The Air Infiltration and Ventilation Centre's first glossary of ventilation terms was published in 1981 as AIVC Technical Note 5 and contained definitions of over 700 words relating to air infiltration and ventilation. Since then, many definitions have been updated and new terms have been added.