Choosing the important parameters of the fresh air system, you need to understand these key points

　　There are many tall buildings in the city, the space of houses is getting smaller and smaller, and the airtightness is getting better and better, and then the fresh air system is gradually applied to the homes of ordinary people. Of course, there are more and more manufacturers of fresh air systems. There are a wide variety of fresh air fans on the market. There are too many brands, both good and bad. For those who have not thoroughly understood the fresh air system, there are too many choices. It is also not conducive to finding an economical, durable and effective fresh air system. So, when choosing a household two-way flow fresh air system, even people who have not had a deep understanding of the fresh air system can quickly find a suitable fresh air system for them?

　　First, look at the purification effect. The air purification function is one of the important functions of the two-way fresh air system, and most filters use "coconut shell activated carbon + HEPA high-efficiency filter" to prevent dust, smoke, pollen, car exhaust, etc. in the air. Pollutants and other peculiar smells have a good adsorption and purification effect. Therefore, it is necessary to pay attention to the adsorption and adsorption capacity of activated carbon, and choose activated carbon with strong adsorption and high adsorption capacity, and its purification effect will be more obvious. There are also grades for HEPA high-efficiency filters, such as H13, H14, etc. The higher the grade, the better the adsorption effect and the stronger the adsorption.

　　Secondly, look at the air volume of the fresh air system. The most important function of the fresh air system is to complete indoor and outdoor ventilation under the condition of tightly closed doors and windows. The air volume will directly affect the duration and effect of indoor and outdoor ventilation. The amount of fresh air will directly affect the clean air and the oxygen content of the outdoor air passing through the air inlet duct and filtering system, and then entering the room. Only when the indoor air maintains a normal oxygen content, people will not feel dizzy, chest tightness and other phenomena when they are active and resting indoors. Therefore, when choosing a fresh air system, it is necessary to understand the actual pure fresh air volume of the fresh air system, that is, the ability of the fresh air system to actually purify the outdoor air and send it indoors.

　　Third, we need to pay more attention to the noise of the fresh air system. There are two noises generated by the fresh air system: one is the sound of airflow; the other is the sound of the motor rotating. The level of noise is closely related to the user's experience. The fresh air system may be turned on 24 hours a day in a special environment. The level of noise will directly affect daily activities, rest, etc., especially when sleep is required at night. Therefore, the minimum wind speed of the fresh air system should not exceed 30 decibels, and the highest wind speed should not exceed 55 decibels.

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