Revosteam, Coil Type Boiler, is a unique water tube coil type boiler in which water flows inside the tube. Revosteam is mostly oil-fired or gas fired boilers which include burner assembly to fire oil or gas. It incorporates the unique principle of combustion known as “Reverse Flow”. Reverse flow means that flue gas reverses its path when they hit the bottom of the shell. This flow of flue gases enhances the combustion efficiency and also allows a high rate of heat release to the surrounding water coil.