9
Electric and electronic measuring, checking and regulating apparatus; pressure indicator plug for valves; control valves; time switches, thermostats; electric and electronic installations and apparatus for the remote control of heating, air conditioning and steam generating installations
11
Heating, air-conditioning and steam generating installations, in particular oil, gas and dual-fuel burners, solar collectors and non-electric parts therefor, boilers for oil, gas and dual-fuel burners and solid fuels; heating plants mainly consisting of boilers, oil, gas or dual-fuel burners and/or solar collectors, heat accumulators, control and regulating apparatus; lighters; water tanks and boilers; heating and circulation pumps; gas and diesel oil heating installations and parts therefor, mainly consisting of heat-production apparatus, drip pots, heat exchangers, circulation pumps and exhaust gas installations with plastic or metal pipes; installations for the cogeneration of electricity and heat and parts therefor; heating apparatus; air conditioning systems, air heaters; atmospheric gas burners with gas boilers operated by atmospheric gas burners; air-conditioners, sauna bath installations, heat pumps, heating apparatus, solar collectors (heating), water heating apparatus; water heaters, mainly consisting of heat exchangers and reservoirs; control valves, in particular for heating installations and regulators for heating installations
37
Installation, assembly, maintenance and repair of heating and air-conditioning installations