What is dust made of?

Some people say dust is made up of human skin. Of course that’s not completely true. Human skin is a part of dust, but dust is actually various things.

So what exactly is dust made of, and what is its role in indoor air quality?


Here dust comes from

Dust can come from indoors and outdoors, and we are the culprits that are tracking dust inside from the outdoors. The outdoor part of dust forms from soil particles and pollen tracked in on our shoes or through open doors and windows. This makes up about two-thirds of the dust in your house.

The indoor source of your dust is a number of things. A little part of which is, in fact, human skin. A large amount of it is fibers from your carpet, furniture or bedding. If you own a pet, there is also some pet dander and fur as well.

What about dust mites?

Whenever we speak of dust, we must also talk about dust mites. Dust mites are little arachnids and their top food source is dead human skin cells and they make up a large part of dust.

Dust mite droppings are the most prevalent cause of allergy and asthma symptoms according to the American Academy of Allergy, Asthma & Immunology. Dust mites also prosper in humidity, so by maintaining a correctly humidified home, you’re able to decrease their impact.

What Can you do?

Lennox produces a number of products that advance your indoor air quality. We carry a PureAir air purification system which is the only single indoor air quality system that fights all three classes of contaminants.

We also have whole-home ventilation systems which allows fresh air into today’s tightly sealed homes. And, of course, we have many whole-home humidity control options.


Your indoor air quality is important to us. We will work with you to keep your home environment as perfect as possible. If you have any questions about your air quality or anything important to the comfort of your home, our professionals are just a phone call away.

Give us a call at 515-278-2900 or contact us online for all of your air conditioner needs.