This Class II, Type A2 cabinet features a built-in electronically commutated motor (ECM) programmed to consistently deliver the precise volume of air required, even as filters load. The motor is in constant communication with the unit's information center, for rapid, accurate performance data. ECM consumes 50% less energy, which allows for cooler and quieter operation, and provides more power for increased HEPA filter loading. Includes Fluorescent and UV light. 115V.