Fresh air systems can be mainly divided into the following types:
Positive pressure fresh air system: The fan introduces outdoor fresh air into the room, making the indoor air pressure higher than the outdoor pressure, effectively preventing outdoor dirty air from entering the room. Suitable for places with high requirements for indoor air quality but low requirements for energy conservation, such as small offices, bedrooms, etc.
Negative pressure fresh air system: The fan discharges indoor dirty air to the outside, making the indoor air pressure lower than the outdoor pressure, and outdoor fresh air enters the room through the gaps of doors and windows. Suitable for places with high requirements for indoor air discharge but low requirements for indoor air quality, such as kitchens, bathrooms, etc.
Two-way flow fresh air system: It consists of a supply fan and an exhaust fan, which can not only introduce outdoor fresh air, but also exhaust indoor dirty air. Suitable for places where air needs to be introduced and exhausted at the same time.
Full heat exchange fresh air system: It has two built-in fans and heat exchange cores, with energy recovery devices, usually concealed in the ceiling, suitable for installation before decoration.
One-way fresh air system: There is only one fan, and there is only one direction of airflow when working.
Wall-mounted fresh air system: The complex fresh air fan is integrated, miniaturized, and intelligent, suitable for renovated houses in old communities.
Wall-mounted fresh air system: It is designed in a cylindrical shape, with all components integrated in a cylinder, and pre-opened on the wall for installation, suitable for installation before decoration.
Vertical cabinet fresh air system: Beautiful appearance, deep purification, intelligent control, simple installation, and convenient maintenance, suitable for family living rooms or small commercial places.
Window ventilator: There are horizontal and vertical types, with a filter device inside to filter the air.