We clean many homes and can count on one hand the number of really efficient Vacuum cleaners people own. For those of you with carpets and rugs, especially if you have furry pets, it is essential to frequently vacuum your upholstery, carpets and rugs as they contain dust mites, hairs, mold, spores, skin, mildew, fungi, and allergens. In other words they get pretty dirty! A carpet is however a positive addition to a home as it acts as an effective trap for all these organisms and pollutants, removing them from the air being breathed. An air conditioned non-carpeted home is more prone to allergen circulation. Increased incidences of asthma attacks are more likely than in homes with a carpet. However the dog playing with your kids on an unclean carpet increases the susceptibility to illnesses. Up to 99% of the pollutants are removed with an efficient regular vacuuming. Sensitivity to house dust is considered to be the commonest single cause of asthma. The dust mite (Dermatophagoides pteronyssinus) is the most important allergen in house dust. While dust mites live mainly in mattresses, making the bed will make them airborne. They settle and will be found in floor dust, mainly in bedrooms. In order to reduce instances of allergic reaction in your home, dust levels should be kept low.