air change efficiency

[AIVC, Air infiltration and ventilation glossary, 1992]:A measure of how quickly the air in the room is replaced. It represents, the ratio between the nominal time constant, and the air change time, for the room.(see also air change time; coefficient Continue reading →

air change time

[AIVC, Air infiltration and ventilation glossary, 1992]:This is the time for all of the air in a room to be changed and is equal to twice the room mean age.(see air change efficiency; coefficient of air change performance; local air Continue reading →