9
Checking (supervision), electronic control and regulating apparatus for heating apparatus, water heating apparatus, combined heating and water heating apparatus, and ventilating apparatus, powered by electricity, oil, gas, geothermal heat, solar power, ambient air heat or renewable fuels, for solar collectors and pumps and for parts of the aforesaid goods; Photovoltaic collectors
11
Heating apparatus, water heating apparatus, combined heating and water heating apparatus, and ventilating apparatus, powered by electricity, oil, gas, geothermal heat, solar power, ambient air heat or renewable fuels, solar collectors for generating heat and heat pumps as well as parts for the aforesaid goods, in particular accessories and replacement parts; In particular room and building heaters, instantaneous water heaters, storage water heaters, circulation water heaters, air heaters, hot water tanks, solar hot water tanks, instantaneous water heating apparatus, circulation water heating apparatus, storage water heating apparatus, water and air heaters, bath water and drinking water heaters, wall-mounted boilers, tankless water heating apparatus, tankless drinking water heaters, for central and/or local heating and hot water supply, being in the form of wall-mounted, floor-standing apparatus or apparatus for installation, in particular wall installation, and individual assemblies therefor, in particular heat exchangers, heating boilers, burners, heat accumulators
37
Assembly, installation and repair of heating, water heating, combined heating and water heating, and ventilating apparatus, solar collectors and pumps and parts for the aforesaid goods, powered by electricity, oil, gas, geothermal heat, solar power, ambient air heat or renewable fuels; Consultancy for the repair of heating and hot water systems, and telephone call centre and hotline services in the field of maintenance and emergency services (repair)
42
Consultancy and planning for the operation of heating and hot water systems, and planning for the repair of heating and hot water systems