Best Buy has a GermGuardian - WiFi Smart 4-in-1 True HEPA Air Purifier with SmartAQM™ - Black Onyx on sale for $139.99. You can save $60 plus receive free shipping. Below is the information from Best Buy.
Up to 150 sq. ft. purifying capacity
To help keep the air clean and fresh. CADR rated 100+ is best for small to medium rooms. Energy Star Certified.
Removes 99.97% of allergens from the air
Including dust, pet dander and polle. Reduces the spread of germs by attacking microscopic airborne bacteria, viruses and mold spores as they pass through the UV-C light.
An Air Quality Monitor that detects the amount of particles in the air and automatically adjusts the speed to optimize room air quality when in auto mode.
Touch sensitive controls
Feature 5 fan speeds for custom operation with Energy Efficient Low Speed Setting. Connects wirelessly using Wifi or Bluetooth.
The Guardian Technologies App
The easy-to-use smart app that allows you to monitor the air quality in your home from everywhere. App notifies you when it's time to replace your filter or UV-C bulb.
Replacement Filter B
Combination filter that incorporates multiple layers of filtration including: a pre-filter, charcoal filter and true HEPA filter, to help improve indoor air quality.
22-inch tower design
Provides a sleek look.
Up a 12 hour timer
For preset operation and reduced energy consumption.