Positive pressure exhaust outlets are used for pressurized air supply during fires. Through the positive pressure exhaust outlets, the antechamber continuously provides air, maintaining positive pressure in the area to ensure smoke does not spread, while still offering an escape space.
       At temperatures above 280 degrees Celsius, it cannot escape. The fuse within the fuse will melt, and the air outlet will automatically close to prevent the spread of fire. Typically used for installation on walls of stairwell vestibules and smoke shafts. It can also be installed on the side of smoke system pipes or at the end of ducts.
       During a fire, the internal electric actuators will open the exhaust outlets, and the temperature, smoke, or manual fire alarm will trigger. The roof-mounted positive pressure fan will automatically activate, pressurizing air into the ventilation shaft. The stairwell antechamber will continue to supply air to the lobby through the positive pressure A infrared outlet, maintaining positive pressure in the lobby to ensure smoke does not spread in the area and to allow for safe evacuation. Escape is impossible at temperatures above 280 degrees Celsius. Fuses within the circuit breakers will melt, and the outlets will automatically close to prevent the spread of the fire.
       Application: According to the National Code for Fire Prevention and Smoke Extraction of High-Rise Architectural Design, an independent mechanical smoke and exhaust system should be installed in the following sections:
       1. Smoke shafts without natural exhaust conditions, fire elevator lobbies, or combined lobbies.
       2. The smoke-proof staircases with natural smoke exhaust do not have an anteroom without natural smoke exhaust.