Ventilation represents a very high part of the building’s energy load. Increased envelope protection combined with the significant increase of the ambient temperature, turn ventilation into one of the major energy consuming uses requiring the development and use of innovative and efficient new technologies to minimise the ventilation energy load. In parallel, the increase of the ambient temperature induced by global and local overheating increases the cooling load of buildings and decreases the cooling potential of ventilation

Personal Environmental Control System (PECS) with the functions of heating, cooling, ventilation, lighting and acoustic has advantages of controlling the localized environment at occupant’s workstation by their preference instead of conditioning an entire room. This improves personal comfort, health and energy efficiency of the entire heating, ventilation and air-conditioning (HVAC) system substantially. Personalized ventilation will also protect against cross contaminations, which are critical in open plan offices and workplaces with close distance.

Worldwide, there is an increasing number of publications related to air cleaning and there is an increasing sale of gas phase air cleaning products. This puts a demand for verifying the influence of using air cleaning on indoor air quality, comfort, well-being and health. It is thus important to learn whether air cleaning can supplement ventilation with respect to improving air quality i.e. whether it can partly substitute the ventilation rates required by standards. There is also a need to evaluate the energy impact of using air cleaning as supplement to ventilation.