6
Rectangular and circular fire dampers of metal; square, rectangular and circular fireproof grills of metal; overpressure dampers of aluminium; regulating dampers of all kinds for installations for conditioning, recirculating and heating air; tubular flexible aluminium ducts, with sound absorbent materials and steel-wool reinforced structures; connecting elements for air ducts of metal; grills of galvanised steel with application of sound absorbent materials to prevent the spread into the environment of noise generated by air vortices; louvres and grills of metal for suction, distribution and purification of air; frames of metal for holding filters for installations for conditioning, recirculating and heating air; metal settling chambers for diffusers, louvres and grills for distributing and purifying air
7
Servo motors and mechanisms for fire dampers; mechanical and electrical air flow regulators for variable flow and constant flow, single conduit or multi-conduit regulation boxes for installations for conditioning, recirculating and heating air; silencers (for motors and engines) of all kinds for installations for conditioning, recirculating and heating air
9
Mechanical and electrical air flow regulators for variable flow and constant flow, single conduit or multi-conduit regulation boxes for installations for conditioning, recirculating and heating air; sensors for mechanical and electrical air flow regulators for variable flow and constant flow and for single conduit or multi-conduit regulation boxes for installations for conditioning, recirculating and heating air; measuring crosses and comparable sensors for installations for conditioning, recirculating and heating air; measuring crosses or cross-shaped sensors for measuring air flow in installations for conditioning, recirculating and heating air
11
Air treatment units; air humidifiers; air dehumidifiers, heat regenerators; centrifugal fans; housed fans; soundproof housed fans; helical fans; wall fans; air extractor towers; air knives (fans); air diffusers of all kinds for installations for conditioning, recirculating and heating air of aluminium, steel or plastic materials; air diffusers of all kinds for installations for conditioning, recirculating and heating air of aluminium, steel or plastic materials complete with manual, motorised or automatic regulation system; spherical nozzles for diffusing air; ceiling valves for installations for conditioning, recirculating and heating air; filters for purifying air; filters of cardboard, textile and felt for installations for conditioning, recirculating and heating air
17
Thermal insulation for equipment; tapes and sealants for fitting installations for conditioning, recirculating and heating air; thermo-expanding tapes (of plastic)
19
Panels, not of metal, for building air ducts; connecting elements for air ducts of plastic