If members of your family have constant allergies and/or asthma triggered by allergies, one of the main culprits could very well be the carpet in your home, which can harbor a number of different kinds of allergens. Carpeting not only holds dust, pet dander, and other nasty allergens, but it also contains chemicals that trigger allergic reactions.
The dust that gets trapped in carpets is enough to cause potential health problems. Most of the time, even the best of vacuum cleaners cannot get all of the dust out of carpets, and unless you have a vacuum with a HEPA filter, most of the dust that does get sucked up just gets blown back out into your carpeting. Shampooing carpet does not reduce the dust amounts by much either, and wet carpeting can lead to other allergens like molds and fungi. The build up of all that dust in carpet leads to a home for hundreds of thousands of dust mites, which are a major cause of allergies as well as asthma.
If you have pets in the home, then that