Choose which carpet cleaner to rent by determining what weight and size the shampooer should be and what style it should be. Also, analyze the attachments and cords that come with the shampooer and what kind of damage each shampooer can potentially do.
Picking up the machine with the hands is a simple way to determine how easy it is to use. If there are narrow hallways or other tight areas in the home, a bulky shampooer may not be the best in terms of maneuverability. Larger machines are also harder to transport when bringing them home and returning them to the rental facility or supermarket.
In terms of brushes, carpet cleaners usually employ either fixed- or rotating-brush styles. Fixed brushes groom the carpet and spread the shampoo, while rotating brushes clean heavy soils better by scrubbing the carpet. The downside to using the rotating-brush style, however, is that the brush-rotation may also damage fragile carpet fibers. Some machines come with upholstery or stair attachments, which can be very handy. When looking at the length of the electric cord for the machine, keep in mind that running extension cords to reach out-of-the-way areas may be a nuisance that can be avoided by having a longer cord.