In the spring or fall, most allergy symptoms are caused by pollen or mold spores, but other causes also play a part. In fact, up to 72 trillion allergens find their way into your home every day.

• Mold spores can irritate the respiratory passages
• Dander from pets can float in the air and cause reactions in sensitive family members
• Dust mites can lurk in bedding, upholstery and almost any other soft material, generating irritating waste particles that can become airborne
• Dust is the big culprit. The average home generates about 40 pounds of dust per year per 1,500 square feet of space
• Homes are built more airtight than ever, trapping more allergens and irritants indoors