When evaluating a CE Vacuum Cleaner, prioritize Suction Power (measured in Pascals/Pa or Air Watts); for high-efficiency cleaning, a minimum of 20,000 Pa is recommended for cordless models and 2,000W input power for industrial corded units. Additionally, check the Filtration System, ensuring it features a HEPA H13 filter capable of capturing 99.97% of particles as small as 0.3 microns. For battery-operated units, verify the Lithium-ion battery capacity (mAh) and ensure a runtime of at least 40-60 minutes on standard mode.