DESC: The Blueair 450E room air purifier is a great way to provide comprehensive cleaning for up to 365 square feet.  It weighs only 34 pounds making transportation and placement a breeze.  Plus it operates at a near silent level so it will not disturb you when it is in use.The 450E is great if you suffer from allergies or asthma thanks to its patented HEPASilent technology.  This unit combines mechanical and electrostatic filtration for effective air purification.  The filter itself is easy to replace and requires no tools to do so.What really sets the Blueair 450E apart is its digital display function.  It monitors the speed, air particle level and has a timer switch incase you wish to go out while it is in operation.  The 450E also comes with a remote control that can operate the machine up to 20 feet away.