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Is the CADR value the most important indicator for air purifiers?

Views: 0     Author: Site Editor     Publish Time: 2021-11-01      Origin: Site

The CADR value is an important indicator of the air purifier, but when purchasing, you should not only consider the CADR value as the purchase decision, but also pay attention to the filter level and the filter CCM value!

First of all, what is the CADR value? The purification efficiency of an air purifier is determined by the design of the fan and air duct, but these two points are difficult for consumers to judge. Therefore, the state stipulates that the merchants selling air purifiers must mark the CADR value. CADR refers to the volume of air that can be purified per unit time. The unit is m³/h. The higher the CADR value in the same space, the better the purification efficiency. So how do you know that the CADR value of an air purifier is suitable for your home? There is a shopping formula, housing space x 5 = the required CADR value. For example: a living room of 30 square meters, a height of 2.5 meters, the house space is 75m³, the space occupied by the sofa and other objects can be calculated as 70m³ meters, multiplied by 5 is 350m³, then you need to buy a machine with a CADR value of about 350m³/h type. Q: Why should the space be multiplied by 5? A: Because indoor air is not cleaned by filtering it once, it is considered excellent to clean indoor air 5 times within an hour according to international standards!

 Air Purifier Filter

Then talk about the filter grade.

The filter grade represents the ability of the filter to intercept particulate matter at a time. The latest version of the European standard EN1822-1:2009 "High Efficiency Air Filter" stipulates that the filter is divided into three groups: E, H, and U:

The higher the efficiency grade, the better the air clean ability.

         Mesh Level               CADR (%)
             E10                 >85
             E11                 >95
             E12                 >99,5
             H13                 >99,95
             H14                 >99,995
             U15                 >99,9995
             U16                >99,99995
             U17                >99,999995

Finally, the CCM value of the filter represents the ability of the filter to accumulate and purify pollutants. The higher the value, the longer the life of the filter. Generally speaking, the higher the CCM value, the higher the price. The filter CCM value has two parameters, solid CCM value and gaseous CCM value. In addition to particulate matter such as PM2.5, the solid pollutant CCM is represented by P and is divided into 4 levels. From low to high, they are P1, P2, P3, and P4. The total weight of the corresponding purified particulate matter is 3000 to 5000 mg, 5000 to 8000 mg, 8000 to 12000mg, or more. The gaseous pollutant CCM removes formaldehyde and other harmful gases. It is represented by F and is divided into 4 levels. From low to high, they are F1, F2, F3, and F4. The total weight of the corresponding purified formaldehyde is 300 to 600 mg, 600 to 1000 mg, and 1000 to 600 mg. 1500mg, 1500mg or more, the highest grade is F4. Note here: some businesses use carbon cloth to increase the CCM value of gaseous pollutants. It is indeed strong in terms of purification efficiency, but it will become sour after a period of time. It is recommended to choose a product with a columnar activated carbon filter. In general, the most important parameters of the air conditioner are these three items, and the noise does not need to be paid too much attention, because the high-end products on the market are noisy, and the low-end products are acceptable.

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