The earlier fresh air system has been used in the industrial and commercial fields since the introduction of Europe and the United States into China, as a crowded place indoor ventilation, this point is similar to other household products, the difference is that the household fresh air system has been better improved and extended while entering the home. The reason is that with the spread of the influence range of smog, early ventilation equipment can not guarantee the purity of indoor air and suitable temperature and humidity, which is no different from opening windows.

With people's attention to smog, fresh air system began to enter the home, a good home fresh air system can basically meet the following three demands:

First, the household fresh air system copes with the problem of outdoor smog. As a ventilation equipment that operates 24 hours a day, the fresh air system will continuously introduce outdoor fresh air into the room, so in a certain sense, indoor air quality has a great relationship with outdoor air, and the outdoor fresh air should be purified in advance to avoid outdoor air pollution.

Second, the release of toxic gases such as formaldehyde, benzene, and TVOL after home decoration is long-term, and the closure of the house will also lead to excessive indoor carbon dioxide concentration after a certain period of time; All kinds of secondary pollution, mold, and viruses generated by home life also need to be ventilated frequently, and the household fresh air system is undoubtedly the best choice for transporting filtered air and discharging household exhaust gas for the room without opening the window.

Third, the indoor and outdoor temperature difference between winter and summer is large, long-term indoor will be troubled by increased carbon dioxide concentration, "air conditioning disease", etc., opening windows and other ways to ventilate hot and cold air will affect the experience effect, increase the power consumption of air conditioning, and to retain this part of the lost energy and reduce energy consumption need to be applied to the HVAC industry heat exchange device, put in the fresh air system is a full heat exchange system.