06
Flexible and rigid pipes, tubes and hoses of metal, all for
the transportation of air, parts and fittings therefor;
metal fittings for pipes, tubes and hoses, ironmongery;
metal hardware
11
Heating, air conditioning and ventilation apparatus and
installations, especially air ducts for heating, cooling,
ventilation and air conditioning purposes; air conditioning
apparatus; fans for air conditioning; humidifiers [heating];
filters for heating, ventilation and air conditioning
apparatus or installations; flues and installations for
draining exhaust gasses
17
Flexible pipes, tubes and hoses, not of metal, all for the
transport of air and parts and fittings therefor;
non-metallic connectors for pipes, tubes and hoses;
non-metallic armatures for pipes, tubes and hoses
[couplings]; fittings for flexible and rigid pipes, tubes
and hoses; packing, stopping and insulation materials; glass
wool for insulation; heat extrusion materials; metal foil
laminated with paper for insulation purposes; adhesive
tapes, other than for office use and not for medical or
household purposes
19
Rigid pipes and tubes, not of metal, for the transport of
air; non-metallic vent covers for HVAC ducts; non-metallic
pipes for heating, ventilation and air conditioning
installations in houses, office buildings and industrial
buildings and greenhouses
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