7
Heat engines, particularly block-cast heat engines
9
Hydrogen-production devices, particularly electrolysis devices (except for laboratory apparatus)
11
Air conditioning and ventilation devices as well as sanitary installations, lighting installations; water pipe parts, heating systems, particularly those using solar energy technology and/or heat pumps; heat recovery devices, mainly consisting of ventilation devices including an exhaust heat exchanger; household power supply and disposal devices, namely hybrid storage modules, fuel cells; small mechanical and biological devices for water purification, particularly gray water purification
19
Tanks for collecting rainwater comprising concrete and plastic elements
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