We expect comfortable conditions when staying in a room for a long period of time. Architectural and constructional conditions (including, in particular, thermal parameters, or radiation transmittance - for transparent elements), and installations in confrontation with external conditions shape the microclimate of rooms. The standards and trends in the development of construction technologies, especially in terms of energy efficiency, equipment and installation systems, the role and the parameters of comfort in the rooms of contemporary solutions have been presented. The classic technologies of boilers (including solid fuel) and natural ventilation are presented. Technologies regarding modern boilers are discussed, both on conventional fuels and biomass, heat pumps, ventilation units, as well as installation systems in terms of energy, ecology and economy. The microclimate parameters were analysed, which shape the comfort and possibilities of influencing them with a construction and installation technique. The paper presents partial results from the conducted research on the impact of weather conditions, thermal protection and building installation solutions on shaping the parameters of the internal environment.