The project is a restaurant, where the main Energy Conservation Measure (ECM) is the implementation of an air conditioning system in the kitchen with focus on the thermal comfort in the occupied areas. The building as a whole is divided in two different occupied zones: dining room and kitchen - food preparation. The dining room is fully air conditioned by a rooftop system. Another rooftop was designed to the kitchen. The kitchen space has two distinct thermal zones: the occupied zone, where people work; and the equipments zone, where the equipments are installed. In order to minimize the influence of high internal heat loads from equipments and considering that only the occupied zone must be maintained within acceptable thermal conditions, the mechanical engineer has defined a strategy where the air distribution system guarantees this condition. Diffusers were installed in order to supply the cooled air mainly in the occupied zone. The equipments zone has an exhaust system only. The heat exchange between occupied and equipments zone was considered in the HVAC design, but the focus of the project was the thermal conditions in the workstation only. For the baseline simulation we are considering the total heat gain of the kitchen (people and equipments). Thus, the conventional system modeled in the baseline provides air conditioning for the entire kitchen. For the proposed design model we are considering the air distribution system analogous to an UFAD system, where only the heat gain of the occupied zone is accounted in the total cooling load. Therefore, in the proposed design model, only the occupied zone is conditioned (cooled), though considering a fraction of the heat gain from equipments zone. The heat and mass transfer between occupied and equipments zone were considered to represent the air distribution system in the proposed design. Computer simulation has shown that the strategy applied in this project provides energy cost savings about 10% when compared to a conventional air distribution system in the baseline. To achieve the prerequisite of energy performance, other 4 p.p. of energy cost savings will be achieved with additional strategies, such as an energy efficient lighting system and a solar heating system for hot water supply. This CIR is to confirm that the modeling assumption described above is acceptable to achieve points under EAc1, considering the modeling of a task air distribution system for the proposed design and a conventional system for the baseline.