The basic difference between an economizer and a flue gas condenser is the fact that an economizer generally heats a smaller quantity of water to high temperatures. The condenser can operate even more efficient because it still cools down a low flue gas temperature and thereby can utilize also the latent heat of the flue gas condensate.

However, the key to a successful application of heat recovery is to make use of this energy. There is a wide range of possible applications:

heating of process water for industrial use, laundries, breweries, hospitals, green houses, district heating, space heating, de-icing, ... this list could be continued endlessly.

The savings potential results from the current flue gas temperature, the required quantity of process water and the operating hours.