The subject of diploma work is designing of active thermal protection, which is used for heating and passive cooling of appartment building. In the opening of diploma work is described solved object, building solution, architectural solution and the process layout of object. Further the diploma work deals with energy budget of object, calculation of demand of energy for heating, cooling and heating of water for apartments and polyfunctional object. Active thermal protection is designed in form of wall and roof heating. Floor heating is designed to cover heat losses. Designed source of heat meets the requirements to create comfortable interior environment for occupants.