Combined system of chilled ceiling and displacements ventilation was also studied with integrated personalized evaporative cooler [21,22]. Personalized evaporative cooler is installed at workstations and explores the idea of “ductless” personalized ventilation [23,24]: air is drawn from the floor level and supplied toward occupant's face and upper body parts. Difference compared to “ductless” personalized ventilation is that air passes through saturated water sponge in the cooler and is cooled by 3e4 K. This combined system is proposed for hot and dry climate, where problematic are peak loads resulting in oversized HVAC systems. An aim of personalized evaporative cooler is to improve thermal conditions locally at the workstations during peak hours when chilled ceiling combined with displacement ventilation is not capable of maintaining design room temperature. Benefits of the personalized evaporative cooler for occupants are temporary and are focused only on the thermal comfort.