The single-layer tunnel kiln, masonry or prefabricated, is employed for the roof tiles firing. The cycles are fast and consumption reduced. A special double seal between walls and the wagons is combined to a special treatment of the under-wagon with controlled pressures. This combination allows higher pressures in the tunnel (unifotmity of firing), low temperatures under-wagons and further heat recoveries.
The single layer tunnel kiln, can also be realized in EKO configuration, which, thanks to the installation of the new self-recuperative side burners, is characterized for the lower specific consumption in absolute, for the low emissions and for an exceptional uniformity of firing obtained.