This Master’s thesis describes the design of a multifunctional building in the town centre of Prostějov. The thesis is divided into three interconnected parts. The first part, focused on the architectural design, consists of technical documentation of a four-storey timber structure designed to passive house standards. The structural system combines cross-laminated timber (CLT) panels with a cast-in-place reinforced concrete staircase core.
The second part focuses on the conceptual design of building services systems. Heating and cooling are integrated into a single VRF (Variable Refrigerant Flow) system with heat recovery function. The part also includes the conceptual design of a mechanical ventilation with heat recovery and a photovoltaic system.
The specialized part of the Master’s thesis describes the design and comparison of two variant ventilation systems in a coffee shop. The goal was to find out which variant achieved higher performance in terms of indoor environmental quality, and ventilation effectiveness. The variants differ in the type of air outlets: grilles and swirl diffusers with standardized supply air velocity were modelled as variant A and variant B.  Using CFD simulations in the Design Builder software, the systems were compared in terms of indoor environmental quality, mainly PMV (Predicted Mean Vote) and PPD (Predicted Percentage of Dissatisfied). Two thermal configurations were considered in the simulations: a model without internal heat gains and a model including heat gains from occupants, food and a coffee machine. It allows a direct assessment of occupants’ thermal comfort in the occupied café, particularly at head height. Simulations including internal heat sources resulted in lower cooling setpoint temperatures in summer and lower heating setpoint temperatures in winter to maintain thermal comfort. The results indicate that swirl diffusers provide a more favourable indoor environmental quality compared to air grilles, particularly in terms of airflow distribution and occupant comfort.