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.)
F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
F24H1/18—Water-storage heaters
F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
F24H1/205—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes
F24H1/206—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes with submerged combustion chamber