Do I Have Mold in My Ductwork?

The presence of mold in one's house might be hazardous.

Some molds can cause health problems in humans.

The problem is that mold can grow in places you can't see, like in the ductwork of your home.

A skilled air duct cleaning professional in Dallas, Texas, will be able to identify the telltale signs of mold growth in your ductwork and remove it during an inspection and cleaning.

Mold in Air Ducts: Types

A variety of molds can be available in various shapes and colors. Below are some types of mold found in air ducts:


It's a mold that appears in the shape of a white powder. Near your air vents, you're most likely to see acremonium. It can take months or years to fully develop.


This sort of mold is notoriously difficult to eradicate due to the wide variety of forms it can take. Aspergillus can appear in a variety of hues, however, the most frequent are green, white, or yellow.


This mold is typically found in air conditioners. Spreading to the ductwork, it has the potential to get into your house through the conditioned air. Mucor is extremely dangerous, and it must be eradicated as soon as possible.

Signs you have mold in your ductwork

Listed below are a few signs that mold may be present in your ductwork:

Musty and mildew odor

Any time your air conditioning system or heater comes on and you're inhaling the fresh air, you can catch a whiff of mildew or mustiness.

The smell of mold tends to be more pronounced in the vicinity of the vent where it is thriving.

One room or area of your house may have this smell, so it's hard to find it elsewhere.

Leaving mold to grow can lead to a musty or mildew-like odor throughout your entire house when your heating or cooling system is activated.

Ventilation system showing signs of mold growth

Signs of mold surrounding the vents are a second indicator that your ducts may be infested with mold.

The air passing through your ducts could liberate mold spores, which would then spread throughout your vents.

If you find black, yellow, or even green growth in your vents, you may have mold. Because mold growth on your vents is uncommon, the most likely source is from your ductwork.

Diseases that have no known cause

Do you have family members who are afflicted by mysterious illnesses?

Asthma and allergy-like symptoms such as hives, nausea, exhaustion, and dizziness can all be brought on by some molds.

If you have mold in your air ducts, you should expect your symptoms to worsen throughout the seasons when your HVAC system is working more often.

There could be mold in your ductwork if you begin to suffer from unexplained ailments when your cooling system or heating system is activated.

Black colored dust

To tell if ductwork has mold, look for black dust on air conditioner vent covers. Toxic to the point of being dangerous, this dust is difficult to clean up.

There is a risk that mold spores will be circulated in the conditioned air as well. To keep it from spreading further, call a professional as soon as possible and turn off your HVAC system.

If you need a professional for air duct cleaning in Dallas, Texas, contact Vent Doctor today.