A steam unit works by using heating coils to heat the water to a boil. At that point, the steam is discharged. A control panel located inside the shower controls the system by allowing you to change the temperature and the duration of the steam. A steam head installed into the lower section of the shower delivers the steam.

Things to Consider
Before installing a steam system into your shower, consider the following things:

• There can't be any exposed plaster or drywall in the area or the steam will make it soggy.
  
• The door to the shower must be sealed tight.
  
• Make sure there aren't any holes in the grout around the shower. If there are, fill in the holes with silicone sealer and finish with a grout sealer.

After gathering your tools and materials and selecting a steam generator that is right for your home, locate the steam generator and have an electrician install a 240 volt circuit. The unit must be placed in a wide-open area that is above freezing. Shut off the water at the main, and close the valves at the water heater