Generally, an air purifier will be most effective in areas with the highest airflow. While it may be out of the way in the corner of the room, it may not be doing its job most efficiently. Instead, try placing it three to six feet from the stove somewhere it won’t be in the way. Ideally, air purifiers work best 3 to 5 feet off the ground. A kitchen counter can be a great option if your air purifier is small enough. Extra points if it’s near a window or doorway.