Hydrogen generators; equipment and installations for the storage of solid or gaseous hydrogen; nuclear and solar reactors for generation of hydrogen as a fuel; boilers for central heating and domestic hot water production; wall-mounted electric and industrial boilers; condensing boilers; wall-mounted condensing boilers; accessories for boilers and central heating installations, namely, expansion tanks, hot water tanks, heat exchangers, safety valves, burners, mixing valves, valves and sensors...