With the Firestorm direct contact water heater, water is heated on-demand. Unlike using a heated water tank, there is no need to heat, store and maintain the temperature of thousands of gallons of water.
Since water is being heated instantaneously and used on-demand, the burner is fired to heat only the amount of water used, as it is used. The result is fast response: you have hot water when you need it, without paying to heat water you don’t use.