How it works

First you have to understand condensation. Condensation occurs when water vapour in the air changes back to its original state – water. Inside a bathroom this will appear as "steam" in the air. Condensation is the result of 2 different air temperatures meeting each other. When warm air is cooled, relative humidity increases until at a particular temperature, called the dew point, the air becomes saturated. Further cooling below the dew point will induce condensation of the excess water vapour.

The same thing occurs in your bathroom. Warm moist air rises in the shower cubicle until it meets the relatively cooler air in the bathroom. Where these two air masses meet, visible water vapour occurs - that’s the clouds of "steam" you see.

Showerdome blocks the warm, moist air inside the shower cubicle, stopping it from meeting with the cold outside air. The result is that no steam is created at all.