What contributes to poor indoor air quality?

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 purifier can help, especially if someone in your home suffers from allergies.

Sources of air pollution:

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

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

Animal dander:
People who are allergic to cats and dogs are actually 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 also grow any place that's warm and humid.