The aim of this Master’s thesis is to design an energy-efficient guesthouse located in Brno, in the Bohunice district. The building is designed as a three-storey structure with a flat roof. A parking area, outdoor seating area, and an extensive garden are planned as part of the site. The main entrance to the building is situated on the southern side. The first above-ground floor features a reception area with a main corridor, a restaurant equipped with a kitchen, and adjacent food and beverage storage areas. Furthermore, this floor features sanitary facilities for the restaurant, an office, a meeting room, a guest room for individuals with physical disabilities, and technical rooms. The second and third floors accommodate guest rooms and cleaning facilities.
The building is heated and cooled using ground-to-water heat pumps. Radiators are designed for heat distribution. Additionally, fan coil units and chilled ceiling beams are proposed, which also serve as cooling distribution systems. The entire building is mechanically ventilated using four air-handling units equipped with heat recovery exchangers. Fresh air intake and exhaust air outlets are located on the building façade. Domestic hot water is provided by two storage tanks. System control is centralized and presented in a global control scheme. Photovoltaic panels are installed on the roof of the building, partially covering the building’s energy consumption. Surplus energy is stored in domestic hot water storage tanks.
This Master’s thesis focuses on designing the use of rain and grey water for a guesthouse located in Brno-Bohunice. The project emphasises reducing expenses for potable water. The main objective was to determine the potential volume and savings of potable water used for toilet flushing and garden irrigation. The thesis also includes the technical design of the sanitary installations and specifies the applied systems. Greywater is collected from showers and washbasins, while rainwater is harvested from the roof surfaces and stored in an on-site accumulation tank. The design is based on normative values for greywater production, rainfall, and water demand for flushing. The investment's payback period was determined based on the prices listed in the Unified Classification of Construction Objects. The results indicate that the total payback period of the technology is approximately nine years, demonstrating that the proposed solution is effective.