Well-designed and efficiently functioning ventilation systems ensure proper indoor air quality, allowing liberal use of indoor spaces. Smoke extraction systems are activated during a fire alarm and work closely with ventilation systems. The smoke extraction process involves removing air from the room that is hot and contaminated by products of fire. Space heating is a process that has undergone an evolution in the solutions used in recent decades. At present, in addition to conventional systems for indoor space heating like radiators with a liquid medium heated by a solid fuel-fired boiler, we can find electric heating mats, efficient electric heaters, infrared radiant heaters in the form of heating mats (installed in the walls of rooms or in the floor) or in the form of various decorative statues or mirrors, which have an aesthetic and functional purpose.