Suffer from seasonal allergies? Many of us actually have a break during the winter season since the air i barren from pollen, mold, cottonwood fluff and other springtime air irritants that can cause our respiratory systems to go into big-time defense mode.

But then again, inside air irritants like pet dander, dust mites and smoke residue can even pollute the inside of our homes. What to do? If you've considered an air filter system or air purifiers, you're not alone.

I use one of these myself and the way it changes the air quality inside a home can be downright addictive. Even if you don't have a huge amount of pollutants inside your home (trust me -- you do), an air purifier can be a wise investment. The thing is to do your due diligence research before purchasing one.