Abrasion Class (AC) Ratings are broken down into five levels, labeled AC1 through AC5. Levels AC4 and AC5 are appropriate for commercial use, while AC1 through AC3 are residential. The AC Ratings are as follows: AC1 is for home use with minimal traffic, like bedrooms or closets. AC2 is suitable for moderate-traffic home use like living rooms and dining rooms. AC3 is best for higher traffic and heavy-use residential areas like kitchens or laundry rooms, and can be used in light commercial applications like small offices or hotel rooms. AC4 is designed for light commercial use like small shops, and AC5 is the heaviest rating, used in larger commercial settings.