The majority of soil in carpet is dry, insoluble, particle matter. Dry soil is often abrasive and can harm carpet fibers if not removed. Routine vacuuming is the most
important step in a carpet maintenance program. It enhances the appearance and prolongs the useful life of carpet by lifting the fibers and removing harmful soil particles. Proper vacuuming also helps create a healthier indoor environment by removing pollutants such as dust mites and their faeces, discarded human skin cells that mites feed upon, mold spores and biological contaminants collected in the carpet.

It is obvious that the selection of the right vacuum cleaner is therefore very important. The Institute of Inspection Cleaning and Restoration Certification (IICRC), which is a certifying body for carpet cleaning professionals, offers these tips on selecting a vacuum cleaner:

Upright vacuum cleaners are generally more efficient
A top-load vacuum works more efficiently than a bottom-load
The vacuum cleaner head should be equipped with a beater bar or revolving brush.
A dual motor vacuum, utilizing one motor to operate the beater bar and one for the vacuum, is most efficient
It should be equipped with a high efficiency particulate air (HEPA) filtration system