Positive pressure air supply port is a kind of air conditioning and ventilation process requirement. Under the premise of ensuring air conditioning, there must be fresh air replenishment, that is, the air pressure in the required air conditioning place is greater than the air pressure in the critical area. A variety of influencing factors need to be considered in the installation process of the positive pressure air supply port, and one of the most important issues to be concerned is its height. It is necessary to set up a fire elevator in the specification, and the fire elevator needs to be set up in the elevator hall. Therefore, there is an evacuated provisional temporary buffering space for proper air supply, which can transport external fresh air through the pipeline and send the wind to the correct vent. Contact: Liang Manager 15068515050