Two Feet of Noise Eliminating Power. Today's central vacuum power units are quieter than ever, but central vacuum mufflers are still a good idea to reduce the noise level even further. If you have your central vacuum power unit located anywhere near your living space, then a muffler is an absolute necessity. In addition, if your central vacuum system is installed in an area that is close to a neighbor's living space, a muffler will significantly reduce the spill-over noise from your central vacuum power unit. There are a variety of mufflers on the market. This Imperium Industrial Central Vacuum Muffler reduces the noise from your central vacuum and helps to maintain a quieter environment. At Central Vacuum Stores, we manufacture this muffler and when we tested it in our shop with a decibel meter, it outperformed the best muffler on the market today. The muffler should always be placed in the exhaust line of your central vacuum system. If you don't vent your system outside, you can still install a muffler on the exhaust of your power unit. The Imperium Industrial Central Vacuum Muffler is compatible with any central vacuum brand and any central vacuum system that is installed with standard central vacuum tubing. Call us if you have any questions. The average do-it-yourselfer can expect to spend about 15 minutes installing this product. Features: 24" of noise eliminating power Reduces noise from your central vacuum by up to 60% Quietest muffler on the market