Xiaobai must read: How to choose the home fresh air system

Although the air pollution problem is already a commonplace, the air purification market has not lost its heat, and the term “new air system” has gradually entered the public eye in the past two years. In fact, the fresh air system is no stranger to us. The fresh air system is used for the overall ventilation in the buildings we work for, but the maturity and warming of the home fresh air system market is quite obvious in recent years. This article will give you a brief introduction to the purification principle, product type and purchasing skills of the home fresh air system.

1. Functional principle interpretation: What is the fresh air system?

Although China's fresh air system market is in a rapid development stage in recent years, most users do not know about such products, let alone how to buy them. Regarding the fresh air system, the various interpretations on the Internet are too complicated. First of all, the author will introduce you to the new home air system from the aspects of purification principle and product function.

The English name of the new wind is FreshAir. According to its name, we can know that the main function of the fresh air system is to “update the air in the home”, which is to ensure that the indoor air is fresh, which is not the same as the removal of pollutants, but also includes the air. The addition and maintenance of ingredients such as oxygen and carbon dioxide is the advantage of fresh air systems compared to conventional household purifiers.

Household purifiers need to close doors and windows when working

For a simple example, the indoor air purifier requires the interior doors and windows to be closed during use. Although most of the pollutants such as PM2.5 in the air can be removed through the filtering effect of the filter screen, the sealing of the doors and windows will cause the indoor oxygen content to decrease, and the carbon dioxide is reduced. Increased levels are equally harmful to the human body.

When we talk about clean air and respiratory health, it refers not only to the removal of pollutants, but also to the dynamic balance of various components in the air, and the role of the fresh air system is to maintain this balance.

Schematic diagram of fresh air system

The purification principle of the fresh air system is not complicated. Simply put, a hole is opened in one side of the room, allowing fresh air to enter the room and then discharging the outside from the other side to achieve continuous renewal of the indoor air. Someone may ask, is it not the same for me to open the window ventilation? Then I ask you, in the autumn and winter of Beijing, do you dare to open the window?

Therefore, the role of the fresh air system is to ensure the cleanliness and freshness of indoor air without maintaining the window, and to maintain the dynamic balance of all components (mainly oxygen and carbon dioxide) in the air.

2. Product classification: the difference between different types is quite large

With the rapid warming of the market, the product types of the fresh air system are also more refined. At present, the common types of fresh air system installations are ceiling type, cabinet type, wall type, etc., and the purification effect may be similar, and the installation process is quite different.

1 ceiling type fresh air system

This type of fresh air system can be said to be the most traditional type, and it was also introduced to the domestic market. It is welcomed by domestic consumers due to its reliable performance and excellent purification effect. The biggest feature is that the installation of the whole system should be synchronized with the decoration of the house. After the installation is completed, the pipe is hidden above the ceiling and there is an air outlet in each room, which can be said to be the “invisible breathing system” of the house.

Since such a system is installed in the form of a ceiling, it will have an impact on the height of the floor, which is why the installation should be carried out in parallel with the decoration of the house. Before installation, the size of the fan should be selected according to the area of ​​use, and a reasonable installation plan should be designed. In the guarantee of the effect, try not to affect the overall decoration pattern.

In addition, the fan and inlet/outlet ports of such systems have a lot of doorways. Fans should be placed in relatively minor areas, such as storage rooms, cloakrooms, etc., to minimize the noise generated by machine operation. The air outlet should be selected in a relatively dense room or area, and the distance between the inlet and outlet should be kept at a distance of 1.5-2m to avoid secondary pollution of the air.

2 wall-mounted fresh air system

The wall-mounted fresh air system is a product type that has emerged in recent years. Compared with the ceiling-type fresh air system, its biggest advantage is that the installation is simpler. I have followed the installation team of a certain manufacturer to conduct on-site evaluation, from calculation and punching to The installation is completed, and the whole process takes about one afternoon. Compared with the ceiling-type fresh air system, which is several weeks of piping and installation time, such products can take the lead in installation.

However, such fresh air systems also have certain drawbacks. Due to the size of the fuselage and the installation position, the fresh air effect may not be as good as the ceiling type system, and the installation cost is also higher.

3-cabinet fresh air system

Similar to the wall-mounted fresh air system, the cabinet-style fresh air products can also be installed separately in the later stage without the need to synchronize with the decoration. The product adopts a box structure, and the occupied space is not too large, and will not have much impact on the overall home improvement environment.

Both the wall-mounted and cabinet-style fresh air systems use a monolithic structure. In my opinion, the two are more like the combination of air purifiers and ceiling-type fresh air systems. They have the purification effect of domestic air purifiers, as well as fresh air. The ventilation function of the system can be said to be a mature solution for indoor air quality.

3. Four key points for purchasing a fresh air system cannot be ignored

Today, when the air pollution is serious, the fresh air system is indeed a good indoor air quality solution. Compared with the traditional purifier, its advantages are mainly as follows:

Low cost of use

At present, the air purifiers on the market are not too cheap. The price of the filter screen is not cheap. In cities with more serious air pollution such as Beijing, the filter replacement is more frequent. This cost is considerable. The fresh air system can maintain indoor air. Daily cleanliness and lower filter replacement costs are also lower;

Keep the air fresh

This is also the biggest advantage of the fresh air system compared to the ordinary air purifier, not only to ensure the cleanliness of the indoor air, but also to maintain the dynamic balance of oxygen content, to ensure overall respiratory health.

If you want to buy a fresh air system suitable for your own, the following key points cannot be ignored:

1 installation form

This determines whether we choose a ceiling-type fresh air system or a wall-mounted or cabinet machine. The price of the ceiling-type fresh air system is generally cheaper, but it must be synchronized with the house decoration; the wall-mounted or cabinet machine can be used with the installation, but the installation The cost must be slightly higher.

2 purification effect

The filter combination and filter grade directly affect the purification of the fresh air system, and this is one of its most important indicators. The fresh air system with more than two layers of filters can achieve better filtering effect. The filter grade is gradually increased from G1-H13. The higher the level, the better the filtering effect.

3 fresh air volume

The new air volume is one of the important factors that directly affect the filtration effect of the fresh air system. We cannot be greedy when purchasing the fresh air system. If the fresh air volume is too large, it will not only cause energy waste but also bring greater economy in later use. burden.

When selecting a new air volume, we can first estimate it according to the standard of 30m3/h per capita fresh air volume, and then calculate according to the indoor air size combined with certain ventilation standards. The formula is the indoor space volume × ventilation standard. The standard of ventilation, generally ordinary households or small and medium-sized offices, conference rooms, ventilation standards are 0.7-1.5 times / h. In the actual purchase, calculate the two values, compare the size, select a larger number, and then release the appropriate head, which is the amount of fresh air required.

4 noise level

This may be an indicator that many users will ignore when purchasing. However, the purpose of installing the fresh air system is to make the family sleep better, and the running noise of the machine is also an important factor affecting the user experience. Generally speaking, the noise is proportional to the air volume, and the larger the air volume, the louder the noise. This is why I do not recommend that everyone be greedy when choosing a new air volume.

When shopping, we need to find a balance between air volume and noise. At the same time, try to install the main unit in the living room, balcony and other environments, avoid installing the air supply port on the bedside side, which can effectively control the wind noise and will not affect the night sleep.

These are the four key points about the purchase of fresh air. Whether you choose to install the ceiling-type fresh air system during the renovation period or choose a simple wall-mounted or cabinet machine, these four points are very important in product selection. After reading this, I believe that everyone has a certain understanding of the working principle, product type and purchasing skills of the home fresh air system. I hope this article can help readers who are ready to purchase the home fresh air system.

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Editor in charge: Carman