The principle of natural vent: The exchange of indoor and outdoor air is realized through natural air circulation. The wind pressure caused by the outdoor wind and the heat pressure caused by the temperature difference between the indoor and outdoor air promote air flow and exchange the indoor and outdoor air of the building. Natural ventilator can ensure fresh air in the building, take away excess heat without consuming power, save energy, and save equipment investment and operating costs. Therefore, it is an economical and effective ventilation method.

Principle of natural roof ventilation:

When the natural wind blows to the building outside the workshop, a positive pressure zone is formed on the windward side of the building, and a negative pressure zone is formed on the leeward side. The pressure difference between the two is used for indoor ventilation, which is wind pressure ventilation.

Hot pressure ventilation is the air flow caused by the difference in air density caused by the temperature difference between the inside and outside of the workshop: when the temperature of the air in the workshop is higher than the outdoor, the air outside the workshop will enter the workshop from the lower part of the building, and from the building The upper part is discharged outdoors; when the outdoor temperature is higher than the indoor temperature, the airflow flows in the opposite direction. In most cases, wind pressure and heat pressure work at the same time. At this time, the flow direction of the mainstream air is determined according to the direction of action of the two driving forces and the comparison of strengths and weaknesses.