6
Metal building materials; tanks of metal; absorber pipes of metal for heat pumps; air ducts (folding spiral-seam pipes); base structures for photovoltaic installations; mounting structures for roof and surface systems, all the aforesaid goods of metal; supply networks of metal for combined heat and power stations
7
Heat exchangers (parts of machines); pumps for heating installations; pumps (machines); screws; motors and engines for combined heat and power stations
9
Collectors, electric; solar energy collectors for electricity generation; apparatus for regulating electricity; inverters; photovoltaic installations; photovoltaic modules; regulators; control engineering devices; computers for control engineering; computer software, in particular for calculating the correct dimensioning of solar and photovoltaic installations, pellet boilers, combined heat and power stations, air conditioning installations, room ventilating devices and geothermal heat pumps; converters, electric; electric transformers; central control devices; electric supply networks for combined heat and power stations
11
Solar heating installations; solar collectors (heating); flat collectors; tubular collectors; solar furnaces; heat pumps; heat regenerators; heat accumulators; heat exchangers; heating apparatus; heating installations; water heaters (apparatus); water heaters; heating apparatus, electric; air-conditioning installations; air-conditioning apparatus; sanitary apparatus and installations; Block-type thermal power stations; wood burning installations, wood-fired boiler installations; pellet boilers
19
Non-metal building materials; ducts, not of metal, for ventilating and air-conditioning installations; tanks of masonry; asborber pipes of plastic for heat pumps
20
Tanks, not of metal or masonry
37
Installation and repair of photovoltaic installations; installation and repair of solar thermal installations; installation and repair of pellet boilers; installation and repair of heat pumps; heating equipment installation and repair; installation and repair of air conditioning installations and air conditioning apparatus