11
Heating, ventilating and airconditioning apparatus and installations built thereof as well as their essential (characteristic) parts included in class 11; heat pumps, solar collectors, solar accumulators, sanitary systems
17
Semi-processed plastic substances, in particular for use in heating, ventilat-ing and airconditioning apparatus and installations built thereof; packing, stopping and insulating materials for heating, ventilating and airconditioning apparatus and installations built thereof; flexible pipes (non-metallic) for heating, ventilating and airconditioning apparatus and installations built thereof
19
Building materials (non-metallic) and rigid pipes (non-metallic) for heating, ventilating and airconditioning apparatus and installations
37
Constructions, repair and installation services, in particular in the field of heating, ventilating and airconditioning installations in buildings; retrofitting of heating, ventilating and airconditioning installations in buildings
42
Building and construction drafting and consulting of and with regard to heating, ventilating and airconditioning apparatus and installations; technical consultancy and expertise in the field of heating, ventilating and airconditioning engineering