06
Chimney flues and metal roof outlets; ducts of metal for
ventilating and air conditioning facilities; metal conduits
for smoke extraction; ducts of metal for central heating
installations; chimney cowls and pots of metal; chimney
shafts of metal; reinforcements for metal chimney flues;
grilles of metal; metal pipe couplings; metal covers for
chimney flues; collars of metal for fastening chimney
flues
11
Apparatus for heating, ventilation and steam generation;
ventilation grates and inlets; extractors for ventilation
apparatus; draft regulators (heating)
17
Chimney flues and roof outlets of semi-processed plastic
materials; flexible pipes not of metal; junctions, not of
metal, for pipes; insulating jackets for chimney flues, not
of metal
19
Chimney flues and roof outlets, neither of metal nor of
plastic; ducts, neither of metal nor of plastic, for
ventilation and air conditioning installations; ducts,
neither of metal nor of plastic for removing smoke; ducts,
neither of metal nor of plastic for central heating
installations; caps and gyrating cowls for chimneys, neither
of metal nor of plastic; chimney shafts, neither of metal
nor of plastic; reinforcements for chimney flues, neither
of metal nor of plastic; grilles not of metal;
non-metallic clamps for chimney flues
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