Article: Vac industry execs clear the air.(vacuum cleaner industry executives)

NEW YORK--As consumers have become increasingly health conscious, vacuum cleaner manufacturers and retailers have promoted the role vacs can play in keeping homes cleaner and by extension healthier.

In marketing to promote vacuum cleaners' abilities to remove dirt and allergens from the home, the terms "clean air" and "dirty air," which historically were used by engineers to describe the path of air within a vacuum cleaner, have reemerged to describe two different types of vacuum cleaner systems.

Some systems use suction systems that channel dirt around the motor and fan. These units, often with sealed vac bodies and microfiltration bags have been dubbed--in the vernacular ...

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