Human-IST has developed an interactive device that measures environmental conditions, communicates objective comfort measurements with users, and receives feedback from them. Learning from user feedback helps to tune prospective behavior. ComfortBox is equipped with ten indoor environmental sensors that together can create an insight into indoor thermal, visual, and acoustic comfort, while also evaluating air quality. ComfortBox is intended to create a dialogue channel between human and building, and it can also evaluate indoor conditions in relation to the productivity and health of the occupants, especially over the long-term.