Some air purifier and humidifier manufacturers test performance with a lab test method called ‘Clean Air Delivery Rate’ (CADR). Conducted in a compact chamber measuring just 28.5m³, air quality is measured with only one sensor.
In real homes, filtration quality matters. If particles aren’t captured first time, they are released back into the home. Unlike real homes, the CADR test is conducted for 20 minutes in a small chamber, tracking just the speed of filtration, rather than the quality.
Small test chamber (with fans on the ceiling and walls to help circulate the air)
That maps and monitors how the chamber is purified for only 20-25 minutes
removed: dust, pollen and tobacco smoke
Dyson air purifiers and humidifiers are engineered to work in real homes. That’s why we developed our POLAR test. Based on a larger room size of 81m³, nine different sensors continually collect air quality data throughout the entire. Ensuring purified air is evenly distributed to every corner.
real living size space test chamber
that continually map and monitor how a room is purified
and 11 gasses removed
Full grid test
Dyson HEPA filtration efficiency test
Founder and Engineer