1.    Dis appear effusion sapped dust in eorridor or elevator so :
•    Save environmental cleanliness and omit undesired smell
•    Disappear insects and injurious animals in buildings and environmten
•    Diminish cleanliness service costs and minimum water using                             
2.    Diminish  and expedite in time of exiting dust so :
•    Non – use elevator repeated and diminish repair and diminish repair and save costs
•    Minimum electieity use ( elevator ٫ light )
•    Expedite and more economical recycle industry
•    Diminish parry cost and disappear dust in country
•    Save natural recources and diminish environmental pollution