The bachelor thesis deals with possibilities of use of linear heat detectors and aspirating smoke detection systems, for monitoring the occurrence of fire in large spaces. The theoretical part of the thesis describes the principle of electrical fire signaling and methods of fire detection. A separate chapter is devoted to the line and suction detectors, explaining how they are used, including the most common applications. The practical part contains framework designs of objects where a line temperature cable and an inhalation system with optical smoke detection are used for fire detection.