Today's homes are built energy efficient to "hold" air inside - avoiding heat loss in the winter and heat gain in the summer. Of course, what's better for your energy bills isn't necessarily better for indoor air quality. This type of construction doesn't allow the home to breathe. Opening a window isn't always the answer - that's when an air cleaner can help, especially if someone in your home suffers from allergies.

Tobacco smoke:
Tobacco smoke is one of the smallest allergens. For years the EPA has reported the link between second-hand smoke and negative health effects.

Pollen:
Pollen comes from trees, flowers and grass.  Just opening a door can allow millions of these particles into a home. Some people are particularly sensitive to the presence of pollen particles.

Animal dander:
People who are allergic to cats and dogs are usually allergic to the dander flakes their pets shed. Dander can remain in a home long after the presence of the host animal.

Mold and mildew:
Typically found in the shower, kitchen or basement, these sneaky plant spores can grow any place that's warm and humid.

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