Mechanical Ventilation: Variable on-demand air systems

Variable air volume (VAV) is a Heating, Ventilation and Cooling (HVAC) system which vary the airflow at a constant or varying temperature to meet the heating and cooling loads as well as the ventilation rates required by the space.

This is a massive advantage over CAV systems, which only deliver a constant volume of air to a space, as it is able to deliver air volumes dependent on the time of day, occupancy, and function of the room. As well as rationalising the heating, cooling, and ventilation systems into 1 system which is not only more cost effective but a much more sustainable practice.