When evaluating electric vacuums, prioritize Suction Power (measured in Pascals/Pa or Air Watts); for commercial grade, look for ≥20,000 Pa. Additionally, verify the Motor Type, as Brushless DC (BLDC) motors offer longer lifespans and higher efficiency compared to brushed motors. For cordless models, check the Battery Capacity (mAh) and Runtime, ensuring at least 45-60 minutes on standard mode. Finally, ensure the Filtration System utilizes HEPA H13 filters to trap 99.97% of particles, which is a major selling point for health-conscious markets.