How Fresh Air Systems Improve Ambient Air

Fresh air system plays a crucial role in indoor environment management, through introducing fresh air, discharging dirty air, purifying air, regulating temperature and humidity and other functions, it can provide a healthy and comfortable living and working environment, maintain human health and improve the quality of life. Therefore, the importance of fresh air systems cannot be ignored, and it plays a key role in indoor air management especially in modern buildings and offices.

1.What is a fresh air system?

Fresh air system is a system that can introduce fresh outdoor air, exhaust dirty indoor air and treat the air, usually used in buildings, offices, residences and other places. Fresh air systems are designed to improve indoor air quality, keep the air fresh, purify the air, and also help regulate indoor temperature and humidity, reduce the concentration of harmful gases and particles, and enhance indoor comfort.

The operating principle of a fresh air system is to continuously introduce fresh air from outside into the room, and at the same time discharge the dirty indoor air, after filtering and treating it, send it back into the room again, so as to keep the indoor air fresh and clean, and to improve the overall air quality. Fresh air systems can provide a healthier and more comfortable air environment for both living and working environments, helping to improve life quality and work efficiency.

2. Common filtration solutions for fresh air system

Common filtration solutions for new air system mainly include physical interception, electrostatic dust collection, ozone oxidation, photocatalyst catalytic decomposition technology.

Physical interception is by the use of HEPA filters to intercept particles in the air, this method costs less, the performance is stable, high security, but require regular change filters, increased maintenance costs.

Electrostatic dust collection is to remove airborne particulate pollutants by using the principle of high-voltage electrostatic adsorption. This method has good filtration effect and low post-maintenance cost, but it cannot absorb gaseous pollutants and may lead to the generation of ozone, which is potentially hazardous to health.

The strong oxidizing property of ozone can oxidize organic matter and odor molecules, which is a purification principle that decomposes harmful substances through redox reaction.

Photocatalyst catalytic decomposition technology uses the energy of a specific wavelength light source to generate catalytic effect, so that the surrounding oxygen and water molecules are activated into highly active free radicals, which can decompose almost all the organic substances and some inorganic substances that are harmful to the human body or the environment.

The fresh air system filter is mainly adopted purification method, in which HEPA filter + activated carbon, physical adsorption should be the more mature technology in the current air purification products. General use of physical adsorption way of fresh air system, there are three parts inside: pre-filter, HEPA filter, activated carbon filter.

Pre-filter is generally a primary filter or medium efficiency filter, the role is to filter lint, dust, pollen, fine hair, soot and other relatively large pollutants. At the same time, the front filter also protects the back of the HEPA filter, so that the HEPA filter will not accumulate thick dust in a short time, resulting in faster replacement frequency.

High Efficiency Filter Purification Technology

HEPA filter specializes in blocking fine particles, which is the haze we often say (PM2.5). To have the function of preventing haze and removing haze, the fresh air system needs to be equipped with H-class filters, and the efficiency of removing PM2.5 depends on the level of HEPA filters.

The higher the grade of HEPA filter, the finer the fiber, the smaller the gap between the fibers. Therefore, filters with higher grades are more likely to get clogged because the gaps between the fibers shrink rapidly. In order to prolong the service life of the HEPA filter, it is necessary to install a primary (G-grade) filter or an secondary (F-grade) filter in front of the HEPA filter, otherwise the HEPA filter will be clogged with large particles very quickly.

However, the HEPA filter of the fresh air system is not the higher the better, although the higher the grade, the higher the filtration precision, but at the same time the air resistance is also larger, the new air flow becomes smaller, the noise is more difficult to control, the service life of the filter is shortened, and the overall cost of consumables increases. For households, H11 or H12 grade is already enough.

Activated Carbon Filter Purification Technology

Activated carbon is made from wood, coconut shell, coal, petroleum coke and other carbon-containing raw materials prepared by pyrolysis, activation processing, with a developed pore structure, large surface area and rich surface chemical composition, strong specific adsorption capacity of carbon materials. Activated carbon filter is using the activated carbon material made of filter.

Activated carbon filter used in the fresh air system mainly has charcoal cloth, honeycomb activated carbon filter, blanket filter, composite filter and other structural types.

The main purpose of the fresh air system with activated carbon filter is to effectively deal with harmful gases and odors and prevent secondary pollution.

Through the above introduction to the function of the fresh air system, it can be seen that the fresh air system filtration for human health breathing play a good preventive role.

SNYLI has been specializing in air purification technology for more than 10 years and can provide you with a wide range of FFU and air filters in various sizes. Welcome to inquiry!