обемът на въздуха на централната система за свеж въздух обикновено варира от 150ммън Qm=N × qm, where N is the number of people in the room and qm is the amount of fresh air required per person. When calculated by the number of room ventilations, the fresh air volume Qm can be calculated by the formula Qm=N × V, where N is the number of room ventilations and V is the room volume.
The air volume of central fresh air system of different brands and models is also different. For example, the air volume of Hisense central air conditioning fresh air system can reach 990m³/h, while the fresh air volume of fresh air air conditioners is relatively low, up to 60m³/h, and the fresh air volume of most fresh air air conditioners is 40m³/h or less.
In addition to providing fresh air, the central fresh air system also has the functions of deodorization, dust removal, dehumidification and room temperature regulation. It works through a displacement transmission method. Outdoor fresh air is automatically sucked into the room through negative pressure, while taking away indoor exhaust gas and exhausting it to the outside in a centralized manner, forming a good circulation Система . В допълнение, изпускателният газ ще бъде възстановена с топлина, със скорост на възстановяване над 80%, като допълнително спестява енергия .