This makes vacuum cleaning so quiet that someone can sleep while it is running. If you want it even quieter near the central power unit, there are special mufflers available. It is important to select a unit powerful enough for the size of your home. A larger house requires longer plastic pipes to reach the wall inlets creating more air flow resistance. This requires more power.
Air watts is a calculated power value derived from a combination of the air flow and suction.
It ranges from about 400 on some models to more than 900 on others. The most powerful ones use several motors and multiple fan stages to attain this powerful cleaning force. If you have easy outdoor access, vent the power unit exhaust to the outdoors. A cyclonic air cleaning design is great for this setup. You have to empty the canister only every three to six months.