6
Chimneys of metal; Stoves and inserts of metal; Ducts and shafts of metal for chimneys, stoves and inserts; Cowls of metal for chimneys, stoves and inserts; Collars of metal for fastening ducts and shafts for chimneys, stoves and inserts; Junctions of metal for ducts and shafts for chimneys, stoves and inserts; Reinforcing materials of metal for chimneys, stoves and inserts; Plating of metal for chimneys, stoves and inserts; Fittings of metal for chimneys, stoves and inserts (pots, firedogs (andirons), plates)
11
Apparatus for lighting and heating; Fireplaces, domestic; Pellet stoves and inserts; Accumulation stoves and inserts; Ash boxes (furnace -); Removable furnace ash boxes; Furnace grates; Chimneys with double-sided fireplaces; Front-loading for fireplace refuelling; Hot-water production; Ovens; Barbecues; Chimney flues; Apparatus for the distribution of heat (by means of pulses or extraction); Heat diffusion apparatus; Air exchangers; Reverse combustion exchangers; Heat regenerators; Heat accumulators; draught dampers; Ventilation hoods
19
Chimneys, not of metal; Bricks; Stones; Joists; Corbels and mantelpieces for chimneys; Plating, not of metal, for chimneys; Reinforcing materials, not of metal, for chimneys; Chimney cowls, not of metal; Building materials (non-metallic); Chimney shafts, not of metal; Fittings, not of metal, for chimneys (pots, plates); Windows for chimneys, stoves and inserts