The power unit and motor of a central vacuum are installed in a garage or basement, far away from the living areas of your home. This is a huge benefit to the air quality in the house. Dust, pollen, and other harmful particles are removed from the home and not circulated back into the air by the vacuum cleaner. Allergy sufferers’ symptoms are relieved up to 61% by installing a central vacuum system, according to The University Of California, Davis School Of Medicine.