Air velocity is one of the main determinants of human thermal comfort. The most common ceiling diffusers do not allow for personalization of airflow for nearby occupants. Drafts are the most annoying climatic factor at many workplaces and are assumed to reduce satisfaction with work, to impair performance and perhaps even health. The AIRVISOR air deflector is a new, easy to install or remove, system which allows local control over the airflow for individual building occupants. AIRVISOR can help achieve the desired end-product of HVAC systems: the comfort, health and satisfaction of building occupants.