Air purifier air volume: not the bigger the better

　　Like the CADR value of an air purifier, the fresh air volume is one of the core indicators of the fresh air product Z, and it is a key factor to measure the applicable area of a fresh air blower. Many users also blindly pursue "the bigger the better" for the fresh air volume of new fans, but this is not the case.

　　my country's "Civil Building Heating, Ventilation and Air Conditioning Design Code" has made clear regulations on the amount of fresh air required for rooms of different sizes: when the per capita living area is FP ≤ 10 square meters, it is necessary to ensure 0.7 air changes per hour. Of course, we can also approximate the calculation, each person needs about 30m3 of fresh air per hour, that is to say, the fresh air volume of a single bedroom needs to reach at least 30m3/h, and so on, the area is larger and can accommodate more people The living room needs a fresh air volume of 150-200m3/h.

　　So why isn't the volume of fresh air the bigger the better? There are two main reasons. The first is to avoid waste of energy. After all, larger fresh air volume will bring higher energy consumption; on the other hand, most of the current wall-mounted fresh air systems have heat exchange functions, especially for the south For users, too much fresh air volume may affect the balance of indoor temperature and humidity. Therefore, when we choose such products, we need to choose the fresh air volume of the product according to our own use area.

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