Review ID: 60909

Review Text: Powerful purification. Bissell air400 is a powerful yet quiet machine capable of 3 air exchanges in a 423sq ft room per hour (if running full speed). Air filtration is done in 3 stages - pre filter, HEPA particle filter (paper based) and 1" thick charcoal filter. Current air quality (PM2.5 meter) is indicated on the front LCD display, in addition to that - color of the display ring would change depending on the current air quality situation. Machine can run in 3 modes: Auto - fan speed is automatically adjusted depending on the current air quality conditions, Silent - minium fan speed and minimum noise, Max - full speed for real quick air cleaning. When ambient light is low (room is dark) - air purifier would enter the "Night Mode" - all lights would dim and buttons won't emit sound when pressed. Timer is available for setting run time of 1, 4 or 8 hours. Overall - this air purifier does excellent job keeping my master bedroom PM2.5 level at 002 at most times, allergen and odor free! Few things I would like to improve: make button beeps a bit quieter, add air quality indicators for VOC levels. In case of the power failure - this machine won't power back on when power is back which makes it impossible to use with external timer or a smart outlet. Replacement filter cost is about $90 for both HEPA and carbon.

Gold Attribute: {'Brand': 'bissell', 'Model Version': 'air400'}

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