HVAC systems are of utmost importance to both residential and office buildings to ensure both the comfort and safety of occupants. In the early days, HVAC studies were conducted using wind tunnel testing; this was both costly and time consuming.

Nowadays CFD can be used reducing costs in terms of both time and money. FLAIR is a powerful tool which allows a user to analyse all aspects of HVAC including: comfort indices, draught rating, relative humidity and mean age of air.