Machinery, plant or laboratory equipment whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514 ), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilising, pasteurising, steaming, drying, evaporating, vaporising, condensing or cooling (excluding those used for domestic purposes); instantaneous or storage water heaters, non- electric; parts thereof