1. It is necessary to install fresh air system. Advantages of fresh air system: the indoor air is fresher. In summer, the indoor air conditioner is on for a long time, the windows are closed, the indoor air is not circulated, and it is easy to accumulate dust. A closed and humid environment is also conducive to the growth of bacteria. The fresh air system ensures the replacement of indoor and outdoor air without opening the window, which makes the indoor air fresher and controls the occurrence of "air conditioning disease" in summer. The fresh air system for keeping indoor fresh air can continuously supply indoor fresh air for 24 hours, send outdoor fresh air into the room after treatment, and exhaust indoor dirty air through tuyeres, exhaust pipes and fans.

2. Whether it is necessary to install fresh air is mainly considered: the ventilation effect of the house. If it is purely for the air circulation function of fresh air, the ventilation effect of a well-ventilated unit will definitely be better. But if the apartment itself is not good, or the windows facing the street are dusty and noisy, or the basement is a relatively closed area with fresh air, this is a good choice. The local air quality, such as Beijing, where there are more foggy weather or some coastal areas with higher humidity, the purification effect of fresh air is very practical, especially for families of pregnant women, children and other members with low resistance. Now many families will design open storage racks, and everyone is worried about the problem of dust accumulation. After installing a new style, there is no such concern.

3. The fresh air system generally ranges from thousands to tens of thousands, which is a relatively large expenditure. Precautions for fresh air installation: In order to ensure the good use effect of fresh air system, it is particularly important to place the host computer, which will not affect the indoor beauty, but also avoid direct rain and direct sunlight. Determine the installation position according to the selection of new heat recovery fan. Choose an area that can bear 3 times the weight of the new fan. The air inlet and outlet of the new fan cannot be blocked by obstacles. Host installation. The installation height of fresh air main machine is generally about 300MM, and it is mostly installed in kitchen and bathroom, balcony and other areas. You don't need a very high floor. Pipeline installation. Minimize the rotation angle, avoid the right angle as far as possible, and adopt oblique tee or 45-degree rotation angle to reduce wind resistance and wind loss; The indoor and outdoor air inlets and air outlets should be as far away as possible, the best distance is generally above 1 m, and the shortest distance is three times of the pipe diameter, so as to avoid the fresh air just entering the room being discharged immediately. Different regions have different configurations. For example, in humid areas such as the south, it is recommended to install total heat exchange fresh air with humidity exchange; Sensible heat exchange fresh air can be installed in the northern region (antifreeze models should be installed in some areas); In areas with severe smog, HEPA filters for filtering PM2.5 can be added.

All of the above are about whether it is necessary to install a fresh air system and what do you think? I hope it helps you!