The heating of liquids in baths and maintaining the temperature is a major requirement in many of the metal finishing industries. Pickling in acid or caustic solutions prepare the metal surface for further treatment. Gas or Oil fired immersion heaters are a proven and economic to this application. Specially designed burners which swirl the flame to ensure the greatest possible heat transfer through the wall of the immersion tube, together with all the necessary pipe trains and safety equipment, can be supplied by The Combustion Group.