Apparatus, appliances, systems and installations for ventilating, air-conditioning, air-filtering and air-purifying; fans; ventilating apparatus and appliances incorporating lights or lighting elements; filters; hoods; extractors; pipes; valves; sockets; switches; taps; connectors; reducers; branches; flexible ducts; ducting; grilles; cowls; baffles; vent terminals; adaptors; pipe brackets; diffusers; airbricks; spacers; fixings; shutters; impellers; pumps; compressors; parts and fittings for the aforesaid goods; none of the aforesaid goods being for use in sewage systems or installations