The waste heat available from the engine exhaust has potential to recover and utilise the thermal energy available. In the era of global warming it is mandatory to concentrate on the waste heat recovery. In this research article a waste heat recovery device was fabricated, to provide process heat in the form of hot water. An attempt was made to augment the rate of heat transfer between the exhaust gases and the heat transfer fluid by providing tube inserts in particular twisted tapes. The heat exchanger tube and the twisted tapes are made of copper, with multipass design. Twisted tapes are well known passive heat transfer enhancement technique. © IAEME Publication.