At MD we discover what your needs are before recommending a central vacuum system. The first item to consider is the floor brush. All homes have some sort of carpet or at least a throw rug that needs grooming. Step 1 is important as it is the basis for the removal of debris, dander, dirt, dustmites, and all kinds of hair. The dynamics of the chosen brush affects all components in a central vacuum system. If you are unsure of your choice for air or electric read Air-Driven vs. Electric for more explanation or skim the main points here:

Based on your needs, which power brush type is best for your home?
Electric-Powered Brush? Excellent carpet grooming More suction reaches floor Picks up larger items Consistent brush revolutions Much quieter Electric-powered Stealth (others available)	Air-Driven Brush? Best for minimally carpeted homes or low pile carpet Less expensive No electricity needed Air-powered TurboCat Zoom (others available)
Which is Best for Your Home? (Click one to go to Step 2)
A. Electric-Powered Brush	B. Air-Driven Power Brush