(under subclass 207) Apparatus including means by which the heated line section receives its heat at a region remote from the combustion area from combustion products flowing through a conduit extending from the immediate combustion area and directing the products to the heated section.
SEE OR SEARCH CLASS
432, Heating,
179+, for a residual material heating furnace in which fuel is burned and in which the chamber exhaust heats combustion material being fed to the chamber.
