Manufacture and Sales of specialist oil fired boiler combustion surface cleaner.for professional use.U.K. Manufactured.Patented in Southern Ireland applied U.K. and .Cleans Oil Boiler combustion surfaces by simply spraying on and firing the Oil Fired Boiler. Non-Hazardous for transport and handling. will neutralise the normally acidic environment found within the combustion areas giving the boiler the potential for longer life. As Dualx cleans the surfaces right back to the metal it will bring the oil boiler back to maximum efficiency thus saving fuel costs.