F24H
FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
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
F24H1/00
Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters