HVAC Fresh air AHU system
The fresh air system allows you to close doors and windows tightly,
Introducing fresh air 24 hours a day,Filter dirty air, exhaust the turbid indoor air,Increase the oxygen content of indoor air,It makes you tired and headaches even without opening the window.
Cabinet type fresh air system: Usually, the air volume is large, which is suitable for larger rooms and takes up a certain space.
The advantages are simple and fast installation, no need to lay pipelines, no need to spend a lot of engineering, and save more time.
As the core of the fresh air system, the filter element tests the technical strength of each brand.
Fresh air filters are divided into two categories,
One type is an electrostatic integrated box, which uses the principle of electrostatic adsorption to filter impurities.
One type is a filter, like a mask, which intercepts pollutants in layers.
Filters are currently the mainstream of fresh air filtration systems.
The filter is divided into different levels to filter different things.
Primary filtration: block mosquitoes, hair, dust, smoke, pollen and other solid particles in the air;
Medium-efficiency filtration: further filter small and medium particles;
High-efficiency filtration: HEPA material that intercepts PM2.5 that causes haze. The higher the HEPA level, the better the filtration effect. At present, it is best to achieve H14 level.
In the fresh air system, the primary, medium and high efficiency filters are generally not used alone, but two or three are used together. A fresh air system with more than two layers of filters can achieve better air filtration effects.
The total heat exchange function of the fresh air system includes sensible heat exchange and total heat exchange. Sensible heat exchange: refers to simple heat exchange, which cannot adjust indoor humidity.
Full heat exchange: Including temperature and environmental humidity, which can ensure a relatively limited adjustment of environmental humidity. Full heat exchange can ensure the maximum level of comfort in the room under the condition of ventilation in the room.
