Which effect is better, fresh air system or air purifier?

Of course, it is a fresh air system, which can ventilate the room without opening the window. Outdoor air is introduced into the room after a series of purification and filtration such as dust removal, sterilization, temperature adjustment and humidity adjustment. At the same time, the indoor polluted air is discharged outside to maintain the circulation of indoor and outdoor air. Better brands, such as Haoting Xinfeng, not only have strong purification and filtration ability, but also adopt ductless design, which does not damage the decoration environment and is simple to install. The air purifier can only circulate and filter indoors, which will lead to high indoor carbon dioxide concentration and insufficient oxygen supply for a long time. It is recommended to use fresh air system. The central pipeline fresh air system is connected with the fresh air host through the pipeline. The principle of the system is to install supporting facilities such as exhaust fans and exhaust pipes in the kitchen and bathroom, and install air inlets in the bedroom and living room. When the exhaust fan is running, the original indoor air is exhausted, so that the indoor air generates negative pressure, and outdoor fresh air enters the room through the air inlet under the action of indoor and outdoor air pressure difference, thus achieving the purpose of indoor ventilation.