In the spirit of full disclosure we will show you how the ozone testing is done and what the results look like. To date, we have not seen anyone else share this type of information. The ozone testing is done at a certified test lab in the US such as Intertek. This is an extensive test with measurements taken in many places on the air purifier. As you can see in the picture below, the negative ions can travel in different directions.

The testing is performed for 8 hours with many measurements taken. To pass, an air purifier must be less than 0.05 ppm. Here are the Max ozone test results. Again, far below the standard for what is considered safe. Actually, this test did not show any ozone.

Secrets Air Purifiers Companies Don’t Want You to Know

There is no doubt that ozone is a dangerous gas and harmful to your lungs. The FDA has established an ozone standard of 0.05 ppm for air purifiers. This means an air purifier must produce less than 0.05 ppm. Some companies claim zero or zero ozone. The motor can produce even a small amount. So, this is not an accurate claim but that’s not what you should be concerned about.