Which one of the following is utilized in building pressurization systems?

Exhaust dampers and relief dampers both play important roles in maintaining proper air pressure in buildings. Exhaust dampers are designed to regulate the amount of air that is expelled from the building, preventing the over-pressurization or depressurization of the indoor environment. Relief dampers, on the other hand, are specifically designed to release excess air pressure when it exceeds a certain threshold. This helps to prevent structural damage and ensure the safe operation of HVAC systems.