Advance 28B Modern Cordless Sweeper - Terra Series, 2.5x Productivity on Carpet, 28 inches Sweep PathAdvance Terra 28B Modern Cordless Sweeper Terra Series, 2. 5x Productivity on Carpet, 28 inches Sweep Path Superior Productivity for Hard and Soft Floors The Terra 28B walk behind floor sweeper leaves wide area vacuums in the dust. With its 28 sweep path and specially designed main broom, you can clean up to 20,000 sq. ft. of carpet per hour (versus 8,000 sq. ft. per hour for a 28 vacuum). Benefits of Terra 28B Walk Behind Sweepers The Terra 28B