The unique motor mount is the secret to our success. A thick rubber cup encases the fan while allowing the motor to vibrate freely on a flexible rubber base. This combination eliminates noise so well that virtually no foam is required. Make your spa life a little quieter with the Air Supply 6320241 The Silencer By Air Supply. Our unique motor mount is designed to reduce noise with a thick rubber cup encasing the fan and allowing the motor to vibrate freely on a flexible rubber base. Easy installation & 2" plumbing at the bottom of the blower means you can enjoy whisper-quiet performance in your spa with no need for foam insulation! Order now to get the best price for the Air Supply 6320241 silencer quiet air blower air supply 2HP-240V!