Regardless of the size of your facility, certain factors about your floor configuration should be considered when you make your decision on which autoscrubber to buy.
The width of the aisles is one of these key factors.
For example, if your facility has six-foot aisles, and is cluttered with fixtures, stock items or other obstacles that reduce the clearance to less than three feet, a 27-inch autoscrubber will have trouble getting through. But a 20-inch should be ideal.
Also, if your facility's aisleways require tight turns, then you should also consider a 20-inch model rather than a 27-inch.
Figure 1: Passes Required to Clean Aisle Widths