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7651 General air exhaust systems (7)
General air exhaust systems, discharging the exhausted air outside the building with or without treatment
7652 Bathroom and kitchen air exhaust systems (9)
Exhaust systems from toilet and kitchen areas, discharging the exhausted air outside the building with or without treatment, including unitary range hoods
7653 Contaminated air exhaust systems (3)
Exhaust systems for removing air from within a building which contains fumes, odours and/or other contaminants, to outside the building
7654 Smoke exhaust systems (4)
Exhaust systems for removing and controlling smoke generated by fire and discharging it outside the building with or without treatment
7655 Safety cabinet and fume hood and cupboards including exhaust systems (0)
Exhaust systems for removing air from safety cabinets, fume hoods and canopies and fume cupboards and processing it as required before discharging it outside the building
7656 Dust and particle exhaust systems (0)
Exhaust systems for removing dust, sawdust and other air-borne particles from the originating source, removing them from the exhausted air and discharging the air outside the building
7657 Scavenging systems - Anaesthetic gases (0)
Scavenging systems for the removal of anaesthetic gases, with discharge outside the building or into an extract ventilation system
7658 Passive ventilators and exhausts (0)
Passive, mechanically unassisted, air supply systems to provide general ventilation and exhausted air discharging systems, from/to outside the building, with or without treatment.
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