Apparatus and method for recovering waste heat from flue gases

摘要: A heat exchange attachment is wound around a flue pipe for transfer from the to surrounding atmosphere. The includes pliable elongated band of conductive material having longitudinally inverted channel-like projecting portion, strip-like contacting portion adjoining therealong on either side thereof, and longitudinal series spaced apart transverse cuts dividing into individual members. portions are disposed substantially in surface contact with outer pipe, members project outwardly atmosphere adjacent edges successive air flow between within may be mounted by screw fastening means.