The heat exchanger enables recovery heat dispersed into the atmosphere from combustion fumes of industrial heaters or from other hot fluids.

As the fumes traverse the tubes upwards, they yield heat to the crossed-air flow generated by the helical fan and are diffused into the environment via the front opening. The operating temperature is not less than 180° C and is controlled by a minimum thermostat to prevent the formation of condensate in the chimney flue.

Given the saving in fuel that can be obtained in heating industrial premises, an estimate indicates that the investment in an "ECONOMIZER", can be recovered in approximately two months.

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