One of the most significant and frequent problems homeowners face when it comes to home maintenance is mold issues. Mold is hazardous for anyone living in the home. Mold can be complicated to spot at the outset and much harder to remediate later on.

Mold grows in areas of your home that are dark, damp, and colder than the rest of the building. It can occur in any part of the house, even in appliances if not attended to appropriately.

Although mold can be found anywhere, one of the most common places that it spawns is in air conditioners and air ducts. Because of the nature of air conditioners, it is easy for mold to prosper and difficult for homeowners to deal with. This is because air conditioners generally stay damp all day and they continuously have moisture running through them. Compared to the rest of the house, temperatures inside air conditioners are significantly lower, making it an ideal spot for mold to grow and spread.

Before you can take care of the problem of mold in your air ducts, it is essential to know the most common types of mold and what they look like. Below you will find five examples of the most commonly found mold types that are found in air ducts, air conditioners, and vents.


Aspergillus is one of the more complicated kinds of mold to identify because there are so many forms that it can take on. There are several colors that this type takes on, most commonly green, yellow or white.


Chaetomium most commonly grows on walls, but it can appear in ducts and vents. It most often looks like a brown cotton-like substance. The problem with Chaetomium is that the color changes over time, making it harder to distinguish.


Alternaria is arguably the most commonly found type of mold. It is green or brown and has a velvet texture. This kind of mold grows in areas that are moist for a significant amount of time, namely air ducts and vents.


Fusarium is a type of mold that tends to grow in spots where there has been water damage, usually on walls. However, it is also prevalent in places where water is continuously running through a space such as air vents if there has been any water damage to them.


Acremonium is a common type of mold that grows in areas that are damp and wet. This particular type of mold is highly toxic and grows over time, taking on the appearance of a white powdery substance.

Exposure to mold is hazardous. This is why it becomes incredibly important to make sure you have your ducts cleaned regularly. At Willard Duct Cleaning our expertise lies in ensuring that your ducts are cleaned properly and efficiently. All of our staff are equipped with special tools to identify and deal with mold efficiently and safely without exposing you and your family to the toxic spores.





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