When evaluating floor sweepers, prioritize the Cleaning Efficiency (sqm/h) and Battery Runtime. For large warehouses, look for a cleaning capacity of at least 3,000 - 5,000 sqm/h. Ensure the unit uses High-Density Nylon or Polypropylene brushes for durability. If purchasing electric models, verify the Lead-acid or Lithium battery lifespan, aiming for at least 4-6 hours of continuous operation. Additionally, check for HEPA filtration systems to ensure dust suppression and air quality compliance in indoor environments.