4 Ways a Dirty HVAC System Can Affect Your Indoor Air Quality

While you might believe that locking yourself inside your home away from all the polluted air outside will keep you safe, the truth of the matter is that indoor air is typically two to five times more polluted! That’s thanks to all the dust, cleaning products, bacteria, and more that is floating in the air. In fact, that’s why there are so many air purifiers in the market today to help indoor air become safer and cleaner to breathe in!

That being said, did you know that your HVAC system affects your indoor air quality significantly! It does, simply because it is responsible for ventilating your entire house. Of course, your HVAC system needs to be clean. Otherwise, it won’t improve create high indoor air quality.

With that in mind, here’s how a dirty HVAC system can affect your indoor air quality:

1. Dust

Your HVAC unit is a machine that is constantly moving, circulating, and heating. With that said, there are many dust particles that accumulate in it over time.

When your HVAC system is left uncleaned, it can circulate all of the dust in your house, increasing the amount of dust in the air that you and your family breathe in!

2. Bacteria

Just as dust can be found in your HVAC system, so can bacteria. That’s why it needs to be cleaned regularly! If you have children, this is especially true because they are more likely to get sick from bacteria.

The best way to ensure that your HVAC system is free of bacteria is to occasionally have your ducts cleaned by professionals. They are trained to know what to look for and where to look. They will know exactly what to do to help improve your indoor air quality.

3. Mold

Mold loves to grow in damp places, and your HVAC system is definitely one of them. If your HVAC system is not clean, then you could be breathing in mold spores that have grown in your HVAC system!

If you are in a humid climate, then your HVAC system needs to be cleaned on a regular basis, not just during the warmer months. Otherwise, you could be breathing in mold spores, which can be extremely unhealthy.

4. Dampness

If you live in a humid area, then your HVAC system is likely to be damp in some way. It is like a sponge that absorbs humidity.

Over time, it will become increasingly wet, which can lead to mold and other problems. That is why it is so important to have your ducts cleaned by professionals.


If you want to breathe in fresher air, especially in the summer when the air outside becomes incredibly polluted, then you need to have your HVAC system cleaned regularly. A dirty HVAC system can affect your indoor air quality in a host of ways, so it is a necessity for your home. Not only that, but it can seriously hurt your health, so you need to make sure to keep it clean and dry at all times!

Stiles Services is an HVAC contractor in Athens, GA, offering repair or replacement services for pumps, heating units, and more. If you are interested in HVAC services to improve your indoor air quality, work with us today!

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