What is Clean Air Delivery Rate (CADR)

What is Clean Air Delivery Rate (CADR)

You may wonder what the reference to CADR means while trying to select an Air Purifier for your home or office. Let's find out.

The Clean Air Delivery Rate, 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.

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.