Woot has the Refurbished Winix C545 4-Stage Smart Air Purifier with Wifi and PlasmaWave Technology for $69.99 (regularly $174.99) for a limited time. Shipping is Free for Amazon Prime Members.

The WiFi Enabled and Winix Smart App compatible WINIX C545 Air Purifier designed for any home environment and ready to capture Dust, Pollen, Pet Dander, Smoke, Mold Spores, Volatile Organic Compounds, and Household Odors. With a fabulous CADR rating from AHAM, this unit is best used for medium to large living spaces, kitchens, or bedrooms. The Winix Certified Refurbished C545 comes with a 1-year filter set and uses a 4-Stage Air Cleaning System featuring an Odor Reducing Carbon Sheet Filter, 99.97% True HEPA Filter, and WINIX PlasmaWave technology.