It begins with your water heater which supplies the only energy required to complete the multiple processes. Serene Steam utilizes the total amount of heat that is available in your existing water heater and brings it directly into your shower enclosure during spa use which allows the heat and steam to flow, and progress continuously during use. It may feel similar to a “Fan type of effect” blowing heat and steam together. During spa use there is no flowing water from your shower head inside your shower enclosure, only the heat and steam which is generated directly from your water heater.