Industrial heater with heat exchanger

Heat exchanger

— a type of heater that is used only in water models (see "Power supply") and diesel units of indirect heating (see "Type of diesel heater"). In the first case, the heat exchanger is a circuit through which heated water or other coolant passes, in the second — a combustion chamber of a special design. Anyway, the air passing through the gun is heated by contact with the outer walls of the heat exchanger. To increase the contact area and increase the heating efficiency, these walls often have a complex shape — with ribbed protrusions, plates, etc.