4
Paraffins for heat accumulation purposes
9
Solar installations; photovoltaic installations; temperature and humidity measuring apparatus, electric and electronic regulating and control systems for heating and refrigerating installations, and for solar installations; hardware and software for scientific experiments, measurements and evaluations
11
Heating apparatus, heat pumps, refrigerating apparatus, freezing machines, distributor and pump stations for heating installations and refrigerating installations, solar thermal installations; capillary tube mats for heating and cooling; wall heating apparatus, floor heating apparatus and ceiling heating apparatus, and mobile panel heating apparatus; cooling ceilings, all of water-conducting plastic tubes; geothermal collectors consisting of water-conducting tubes, earth probes, heat accumulators, cold accumulators, solar heat accumulators
17
Plastic tubes and goods made therefrom, including capillary tube mats, pipe connectors; thermal insulation for buildings, materials for insulating buildings (not of metal), facade insulation
19
Building materials (non-metallic); non-metallic rigid pipes for building
42
Geological and geothermal and hydraulic research and development, scientific experiments and measurements; development of hardware and software for these measurements and evaluations; research, development and design; drilling boreholes for the installation of heat pumps