BreatheCLEAN is far more effective than room units because it installes into your existing ductwork and purifies air as it circulates through your home. BreatheCLEAN purifies the air while filters only capture particles and is a great addition to the existing filters in your furnace requiring only an annual bulb change to maintain effectiveness. BreatheCLEAN plugs into a standard outlet and uses less energy than a 75watt light bulb.