More than 50 million people in the United States suffer from allergies of some kind, and allergies are the 6th leading cause of chronic illness, according to the American College of Allergy, Asthma & Immunology. If you or one of the people in your household suffers from allergies, you likely do a lot of things at home to keep allergens out of the house.

Unfortunately, many allergens hang out in places that are not necessarily reachable by the homeowner, and the duct system connected to your HVAC unit is the perfect example. This dark and concealed area often harbors dangerous allergens that get pushed out with the heated and cooled air. Take a look at common allergens found in household ducts and why you should be concerned.


According to the Asthma and Allergy Foundation of America, roughly 3 out of 10 people with allergies have an allergic reaction to cats and dogs, and the typical reaction is caused by exposure to pet dander. Pet dander is this microscopic material that is like tiny flakes of dried skin. The material can bind to things your pet uses, like toys and bedding, but it can also be attached to hair and be hurled airborne when your pet shakes or scratches.

Pet dander gets into your ducts in a few ways. First, air circulated through vents can capture dander and funnel it back through the system. Some of this dander can make it through the filter and back into the ducts. In addition, dander can get into the ducts by falling into the vents that you have on the floor. Either way, any air blowing through the ducts will carry dander with it.


Here in Orlando Florida we’re all too familiar with cockroaches and their feces, saliva, and corpses are all problematic allergens. According to the American College of Allergy, Asthma & Immunology, about 63 percent of U.S. homes have cockroach allergens. Sadly, cockroaches can live in ducts, which are dark, warm, sometimes moist, and the perfect breeding ground for these insects.

If you have cockroaches living in your ducts, their excrement, saliva, and decaying bodies can be sent through every time you turn on the HVAC unit.

There are approximately 3,500 different types of cockroaches in the world and 70 different species are known to inhabit Florida. Some of the most common types of roaches found in Florida homes include the American cockroach, German cockroach, and smoky brown cockroach. If you discover you have these pests in your home, calla pest control professional to eliminate the infestation and a duct cleaning specialist to remove any remaining allergens from your ducts.


You think of problems with pollen allergies when you head outside, but pollen can just as easily be brought into the house on your family members and even through the air. This pollen gets circulated through your HVAC system. While a good filter will capture some of the pollen, some of this allergen will also land in the ducts of the house and get circulated back through the vents.

Pollen allergies affect at least 8% of adults in this country. These microscopic grains that are released from certain parts of a flower can beat really high levels in certain areas of the country and at certain times of the year. However, if the allergen is brought into your home, you could be dealing with allergic reactions to pollen throughout the year, even when pollen levels are low outdoors.

If you or your family members suffer from allergies, you should have your HVAC ducts professionally cleaned to keep allergen levels inside the home at bay. Reach out to us at Sunshine Heating & Air Conditioning, state license number CAC 1816975, for a free quote to have your ducts cleaned professionally.