Is fog from vents mold-related?« Back to Previous Page

Yes, fog from vents can indeed be mold-related. The scenario described where your kids have been coughing more and there's an unusual mist coming from the AC vents is concerning and warrants attention, especially given that it only occurs occasionally but during a period of increased humidity due to rain.

In Dubai, air conditioning systems are a crucial part of daily life, especially in buildings constructed without natural ventilation. The continuous operation you've mentioned for two years means your system has been running at optimal efficiency, yet the sudden appearance of this mist could be indicative of an issue that's only surfacing now. This is not uncommon, as some mold issues may lie dormant until environmental conditions change.

Molds thrive in moist environments and can release spores into the air when disturbed or growing. When you notice a foggy mist from your AC vents, it’s important to consider several possibilities:

1. Condensation: The most common cause is condensation on the evaporator coil or other cold surfaces within the system. This happens as warm, humid air from outside meets the cooler temperature inside the ductwork. If this moisture isn’t properly drained away, it can contribute to mold growth.

2. Mold Growth in Ducts: Over time, if not maintained correctly, dust and debris can accumulate in your AC's duct system. This provides a perfect environment for molds to grow, especially during humid conditions like after rain. As these fungi develop, they release spores into the air which can be dispersed when the system is turned on.

3. Leaking or Damaged Ducts: If there are any leaks in your AC's ductwork that are not properly sealed, it could allow moisture to seep in and create a humid environment where mold thrives.

Given these possibilities, I strongly recommend having a professional environmental inspection of your HVAC system. In the UAE, regulations require regular maintenance checks for commercial buildings, but residential inspections aren’t always mandated unless there’s evidence of issues like this. However, it's wise to get an assessment done as soon as possible to ensure both comfort and health.

Call 800-MOLDS or email hello@saniservice.com if you need immediate assistance. They can provide a thorough inspection and recommendations for remediation if mold is present. Remember, early detection and treatment are key in managing indoor air quality issues effectively.

Also, it's crucial to ensure your AC system is properly maintained according to manufacturer guidelines and local regulations, especially after experiencing changes in weather conditions such as heavy rain. Regular cleaning of filters, condenser coils, and the evaporator section can prevent the buildup that leads to mold growth.