Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
F22B33/02—Combinations of boilers having a single combustion apparatus in common
F22B33/10—Combinations of boilers having a single combustion apparatus in common of two or more superposed boilers with separate water volumes and operating with two or more separate water levels