What dry-erase marker brand is best for commercial whiteboards?

EXPO brand low-odor dry-erase markers are the most widely used in commercial settings. Quartet and Avery also produce quality commercial markers. For glass whiteboards, use markers specifically designed for glass (typically non-toxic, low-odor formulations with a cleaner erase). Avoid cheap markers from discount stores — they often contain solvents that ghost into porcelain surfaces. OfficeFurniture2go.com can recommend compatible accessories — call 1-800-460-0858.