What is Air Purifier CCM CADR?

Have you ever wonder what is CADR and what is CCM? When buying an air purifier, there are some technical datas on the air purifier like CADR and CCM, which confuses a lot and do not know how to choose the right air purifier. Here comes the science explanation.

Is The higher the CADR Rate , is The Better Purification Rate?

CADR is abbreviated of Clean Air Delivery Rate. It is a way of measuring the performance of the air purifiers. The CADR rating reflects the volume of air in CFM (cubic feet per minute) or M3/H (cubic meter per hour) that is cleaned of particles of certain sizes.

To measure the effectiveness in removing different particle sizes, there are two main kinds of CADR according to the domestic market, which is CADR for particles, and  the other one is CADR for Formaldehyde.

Two main authorities in charge of the testing in domestic market are Guangdong Detection Center of Microbiology and Guangzhou Institute of Microbiology Co., Ltd.

One main authorities for US market is AHAM, The Association of Home Appliance Manufacturers.

Can we directly choose the air purifier of higher CADR value when buy air purifiers?

The answer is no. It depends on the room’s size. The air purifier extracts air through the fan, and outputs clean air after adsorption of impurities and pollutants through the filter. The higher the CADR value is, the more power the fan needs to drive, which not only consumes more energy, but also brings more noise. It makes inconvenience for the usage of the air purifier.

Then how to choose the right CADR air purifier? Please consider the room size. According to the international standard, it needs to exchange the air 5 times per hour. This would be calculated from the formula: S=F/5H. F refers to max air flow in m3/h. H refers to the height of the room in meter. S refers to the effective area in square meter. The right CADR value can not only meet the purification needs of the room area, but also does not waste energy consumption.

Is The higher the CCM Rate , is The Better Purification Rate?

CCM, Cumulate Clean Mass, indicates the continuing air-cleaning power of a purifier. It’s assessed by measuring the sheer volume of particulate matter and formaldehyde that can be efficiently filtered by the purifier before it starts to lose its overall efficiency over time. Generally, it means the lifetime of the air filter. We can say the higher the CCM rate is, the better purification rate is.

Normally, there are Particle CCM particulate matter and CCM formaldehyde. And for these two, the max level is P4 and F4 grade correspondent.

The higher the CCM is, the better the overall long-term performance and stability of the product. 

The higher the P and F value, the greater your purifier’s long-term performance. And it doesn’t get any better than P4 and F4.

Here airdow would like to recommend you some air purifiers:

New Air Purifier HEPA Filter 6 Stages Filtrations System CADR 150m3/h

Plasma Air Purifier For Room 323 Sqft DC15V Low Energy Consumption

IoT HEPA Air Purifier Tuya Wifi App Control by Mobile Phone