Home Improvement

Can mold grow in HVAC ducts?

If your AC unit is oversized for the space you have, one of the problems that it can cause is mold in air ducts. Larger units can cool small spaces too quickly and turn off before dehumidifying the air, leading to excess moisture. This moisture can build up in your rooms and ductwork.

How do I get rid of mold in my AC ducts?

For non-porous surfaces (such as steel ductwork and vent covers), you can use 1 part bleach with 16 parts water. Pour the mixture into a spray bottle for ease of application. Alternatively, you can purchase an EPA-approved mold killing product. Also, purchase an EPA-approved mold inhibitor to apply after the cleaning.

Is it normal to have mold in air ducts?

Unfortunately, your air conditioning system and your air ducts are a common place for black mold to reside. Moisture plays a significant role in the growth of mold. Your air conditioning system can act as an incubator for black mold because of its constant change in humidity levels throughout the summer season.

How do I know if there is mold in my air ducts?

If there is mold in your ducts, the air flowing through the ducts may loosen the spores and push them around your vents. If you look at your vents and see black, green, brown, or yellow growth, it may be mold.

Is mold in air vents harmful?

If you notice mold growing in your air vents, take immediate action. Mold is dangerous when it’s in an air vent because your HVAC system is probably circulating spores through your home, leading to potential respiratory issues.

How common is mold in HVAC?

It’s common to find mold in your air conditioner or furnace. Your furnace and evaporator coil have all the components necessary for things like mold to develop. Primarily because there’s consistent moisture.

What does mold look like in AC vent?

If you see black spots or black dust appearing around air vents, there’s a good chance that mold is growing inside. These black spots are usually difficult to wipe off, and if it has a wet, slimy texture, that’s another indication of black mold.

How do I know if my air ducts need to be cleaned?

4 Signs that Your Air Ducts Need Cleaning

  1. Dust and debris during start-up. One of the best ways to tell if your ducts need cleaning is to check how much dust and debris are blown out when starting your heating unit. …
  2. Mold growth. …
  3. You notice rodents or insects. …
  4. The presence of carbon monoxide.

How often should air ducts be cleaned?

every three to five years

According to the National Air Duct Cleaners Association, homeowners should have their air ducts cleaned every three to five years, but the timing really depends on the region in which you live, how often you use your HVAC system and whether you have family members that have respiratory problems.