Three Phase Centralized vacuum cleaners have the blower and filtration unit located in a central location, and is connected by pipes to fixed vacuum inlets installed throughout the premises. Only the hose and cleaning accessories need be carried to different locations for cleaning. UPVC or metal piping connects the inlets to the central unit. The dirtbag or collection bin in a central vacuum system is usually large enough that emptying or changing need not be done very often. The central unit usually stays on standby and is turned on automatically only when required. A centralized vacuum system typically produces greater suction than common portable vacuum cleaners because a larger blower and more powerful motor can be used when it is not a portable system. A cyclonic separation system does not lose suction as the collection container fills up until the container is almost full. Three Phase Centralized vacuum cleaners offer higher cleaning because unlike a standard vacuum cleaner, which must blow some of the dirt collected back into the room being cleaned (no matter how efficient its filtration), a central vacuum system removes all the dirt collected to the central unit. Since this central unit is usually located outside the main area, no dust is re-circulated back into the room being cleaned. Another benefit of a centralized vacuum system is because the blower unit is located in a remote location, there is much less noise in the room being cleaned than with a standard vacuum cleaner.