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Amazon Treasure Truck has Blueair Blue Pure 311 Auto Air Purifier for Medium Rooms discounted by 27% to $ 174.99. Shipping is free.

Deal URL: https://www.amazom.com/ttgo

Recommended for medium rooms, completely filters air in master bedroom, living room or playroom about every 12.5 mins (4.8x an hour at 388 square feet) on high​
Combination filter; Carbon traps light NULLs; HEPASilent technology removes 99.97% of airborne particles down to 0.1 micron, like NULL, NULL, and NULL⁰
Intuitive Auto mode; Automatically adjusts to real-time conditions reported by the particle sensor to maintain a comfortable home environment​