CPC Main Group F27B 1/00 Shaft or like vertical or substantially vertical furnaces 5 direct subcodes Child Classifications Navigate with arrow keys, Enter to open F27B 1/005 F27B 1/02 with two or more shafts or chambers, e.g. multi-storey F27B 1/06 of other than up-draught type F27B 1/08 heated otherwise than by solid fuel mixed with charge F27B 1/10 Details, accessories or equipment specially adapted for furnaces of these types