What type of system uses fans to manage smoke movement?

The correct answer is HVAC system because it is specifically designed to control heating, ventilation, and air conditioning within a building. A critical function of HVAC systems in high-rise buildings, particularly during a fire, is to actively manage smoke movement. This is achieved through the use of smoke control fans that can either exhaust smoke from a building to the outside or maintain a smokefree environment in certain areas by pressurizing those spaces. This capability is essential for ensuring safe evacuation routes and protecting occupants from smoke inhalation.

In contrast, emergency generators, burglar alarm systems, and water supply systems do not serve the purpose of managing smoke. Emergency generators provide backup power, burglar alarm systems are designed for security purposes, and water supply systems are focused on providing water for firefighting and other needs, rather than controlling smoke. The ability of an HVAC system to regulate air quality and manage smoke is paramount in enhancing overall fire safety in high-rise establishments.