Types Of Allergy Vacuum Cleaners: Part 2

Cyclonic vacuum cleaners
These bagless machines use a centrifugal airflow to collect dust and deposit it in a canister. The cleaners also use HEPA filters that do not let dust pass back into the room. But since they do not seal the dust away, as do filter-bag machines, it can be difficult to empty the canister without breathing in the dust or getting some of it on your clothes and skin.

Water-filter vacuum cleaners
These machines suck the dust-laden air through a water reservoir, where water-soluble dust, including allergens, is left behind in the water. There is concern that some brands of cleaner emit dust particles in the form of an aerosolized spray, and that the water reservoir itself may become contaminated with mould unless it is emptied and thoroughly dried after each use.

Central vacuum cleaners
A cleaning system of this type, which is a popular feature in some countries, consists of a suction unit and dust-collecting bag or bin placed in a basement, utility room, garage, or understairs closet. To use the system, you plug a long, flexible hose into strategically placed sockets, and the dust is transported via narrow ducting hidden in the building's structure to the collecting bag or bin. Because the motor unit and dust receptacle are stationary, they can be far larger and provide more powerful suction than any portable cleaner.

Central vacuum cleaners are easy to maintain and operate, especially since a lightweight hose is all you need to carry around your home. The collecting bag or bin of domestic units needs empting about every 6 to 12 months - although an allergy sufferer should avoid doing this.

Most central vacuum cleaners are vented to the outdoors. Outdoor-vented cleaners are preferable for those with allergies, as the air pulled into the vacuum cleaner will then go straight outside, so eliminating any concern that undesirable allergens can escape back into the living space.

Central vacuum cleaners can be fitted into a home quite easily after it has been built. Rather than being run up inside the walls, the ducting that connects the sockets is usually run up inside a cupboard (often an understairs cupboard). Only two sockets are needed for most homes (one upstairs and one downstairs) because of the length (about 30m/98ft) of the hose which can normally stretch the length of the house if the sockets are placed in the centre of the home.



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