CADR stands for ‘clean air delivery rate’. It is an industry standard test that can be used to compare the performance of different air purifiers.
It allows for a standard test to measure the effectiveness of air purifiers at filtering out particles and gases from the air.
The CADR test is a controlled test, performed in a testing lab. It is not a replacement for real world air purifier tests, but provides a good way to compare the performance of different air purifiers.
Read more: what are the standards for measuring CADR?