![Watch the video Testing for bacteria in water vapour](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-magnifying-glass.jpg?$responsive$)
The engineering story
Some other humidifiers have dirty secrets. Ours has Ultraviolet Cleanse technology.
![James Dyson with Dyson humidifier](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-james-dyson.jpg?$responsive$)
“Existing humidifiers can be unhygienic. They allow bacteria in the tank to be transmitted directly into the room. By questioning, testing and often trying the seemingly illogical, we could create technology that solves this problem – and engineer a better product.”
James Dyson, Engineer
![Ultraviolet light in water tank](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-ultraviolet.jpg?$responsive$)
![Materials in testing](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-polyetherimide.jpg?$responsive$)
![Helium element symbol](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-helium.jpg?$responsive$)
![Dyson humidifer in testing](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-testing-room.jpg?$responsive$)
![Water testing in laboratory](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-hard-water.jpg?$responsive$)
![Dyson humidifier](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/humidifiers/engineering-story/air-quality-humidifier-engineering-story-front-on-black.jpg?$responsive$)
![motiff](/content/dam/dyson/motifs/may-motifs/Dyson-Humidifier.png)
Buy direct from the people who made it