Central Vacuum System
Vacuum cleaners are devices that use an air pump to create a pratial vacuum to suck up dirt and dust, normally from carpeted floors. Some models have power heads, which contain the same type of mechnaical beaters found it upright units, although they are driven by a seperate electric motor. They are basically canister vacuum cleaners, excetp for the fact that straps are used to carry the canisetr on yuor back. The bag in the central vacuum system is normally so big that emptying it or changing needs to be done less as often, somteimes only once a year.
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