First, air purifiers work on a room by room by basis. They are sized for the volume of air to clean in each room.
Second, many Alen purifiers feature a precision air quality sensor called a Smart Sensor. Though our air purifiers are designed to run 24/7 for a lifetime, some customers want to know their real-time air quality. Our Smart Sensors change a color indicator to show the particle level in a room. Blue is pure while Red or Purple (depending on the unit) is harmful. The Smart Sensor can automatically adjust the unit’s fan speed in Auto mode to optimize air quality. Units with a Smart Sensor include:
- BreatheSmart 45i
- BreatheSmart Classic
- BreatheSmart FIT50
- BreatheSmart 75i
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