HEPA 420 Air Purifier delivers silent, high performance with a five-layer, True HEPA filter and space-saving design. Air Quality Indicator is color-coded for quick, easy understanding. Blue bar means excellent air quality while green indicates good air quality. Red alerts you to poor air quality. In automatic mode, the air purifier automatically adjusts the fan speed to low, medium or high according to the air quality. Sleep mode keeps the fan low if the particulate matter level (2.5 micron diameter) is under 50, but increases the fan speed if the level goes over 50. Convenient timer lets you run the device 1 hour, 2 hours, 4 hours or 8 hours before the air purifier automatically shuts off. With an air outlet on the top instead of the side or back, you can set the air purifier against a wall to save space. Use the carry handle for easy relocation.

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