Before the rain begins, as wind picks up and clouds roll, the sweet, sharp and fresh aroma fills the air. This is the smell of ozone – sometimes described as metallic or resembling chlorine, a burning wire or electrical spark. You can smell it as thunderstorm’s downdrafts carry O3 from higher altitudes to nose level. As ozone has a distinctive smell, humans can detect it even in very small concentrations.

TesHub products are inspired by nature, so you can smell ozone produced by our ozone generators – still small enough concentrations to be effective but healthy for you and environment.