anyone have an air purifier?

Does anyone have any suggestions for a good Air Purifier for my home?
I would try this website. They are selling products for allergy suffers (my daughter is one) and we have had great success with ours. We got a whole house filter and it works great.
http://www.allergybuyersclub.com/
Good Luck.
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YES they do help we have alleges well bad in my house and dust and we are smokers i have two of them one in the living room and one in my bed roomand now we don,t have near the dust we had . we can tell the differences . if you have the money to spend for a high price one go for it . but the cheap ones work just as well and i don,t mind changing the filter once a month.
I use to want to buy a purifier for my babies. But all the doctors said to get one if it makes me feel better. But they really are of no use. They do purify your air, but that doesn’t really do much for your health.