clean air delivery rate cadr

You may wonder what is clean air delivery rate or CADR means while trying to select an Air Purifier for your home or office. Let's find out.

The Clean Air Delivery Rate-cadr meaning, or CADR for air purifiers, can tell you how efficient the air purifier is at removing specific contaminants from different room sizes. It reflects the volume of air in cubic feet per minute (CFM) that flows through the air filter.

cadr rating for air purifier

The three pollutants that are measured are:

  • Pollen
  • Smoke
  • Dust

These are the most common pollutants found in the home.

The higher an air purifier scores in a given category, the more efficient it is to remove particles in that size range; this tells you the air purifier's effective coverage area and how many air changes per hour (ACH) it can manage. ACH refers to the number of times an air purifier filters all the air in a room. Comparing CADR numbers helps you determine which unit is the most effective air purifier for your requirements.

How to calculate cadr value

cadr rating

1. The formula for calculating the value of "air purification efficiency" is: "CADR average value" or "single CADR value" ÷ certification applicable area × 100%.

2. The air purifiers of regular manufacturers will be marked with CADR value (the amount of clean air per hour), and the applicable area = CADR×0.12 (0.12 is the conversion factor ), for example, the CADR of an air purifier is 500 Cubic meters/hour, applicable area=500*0.12=60 square meters. At present, the area of ​​most households is about 100 square meters, so in reverse, a relatively suitable CADR for an air purifier should be: CADR=100/0.12=833 cubic meters/hour. There is a domestic brand called EAWADA. Their products are manufactured by Foxconn (Foxconn is the one that manufactures Apple mobile phones). The CADR is 880 cubic meters per hour, which is suitable for an area of ​​about 100 square meters.

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