This standard deals with the safety of electric air-cleaning appliances, their maximum rated voltages being not more than 250 V for single phase and 480 V for others. Appliances and machines intended to be used in household, commercial applications, in shops, in light industry and on farms, are within the scope of this standard. Additional requirements for appliances and machines intended for commercial use are given in Annex ZE. NOTE Z1 Examples of appliance for household environment are appliances for typical housekeeping functions used in the household environment and appliances for typical housekeeping functions used by non expert users: - in shops, offices and other similar working environments; - in farm houses; - by clients in hotels, motels and other residential type environments; - in bed and breakfast type environments. NOTE Z2 Household environment includes the dwelling and its associated buildings, the garden, etc. NOTE Z3 Appliances built into building ventilation system are also within the scope of this standard..