Could AC be causing musty smell and coughing?« Back to Previous Page

After the rain last month, I noticed a musty smell in my son’s bedroom, and it only gets worse when the AC is on. The window unit in his room has been running non-stop since we moved into this apartment two years ago. It feels like every time he’s in there, his coughing gets worse. Could the AC be causing or worsening these issues?
Posted by Jennifer Jones
Asked on February 28, 2026 5:28 am
The air conditioning unit installed in your son’s bedroom could indeed be contributing to the musty smell and worsening of coughing symptoms. It is a common occurrence for HVAC systems, especially those that have been running continuously or are older models, to develop issues that can affect indoor air quality. In Dubai and UAE, it's crucial to adhere to specific regulations regarding building codes and maintenance of HVAC systems.

Firstly, the musty smell could be due to mold growth within your window unit AC. This is particularly common after rain events where condensation may have accumulated in areas not properly sealed or ventilated. Mold thrives in damp environments and can release spores that contribute to respiratory issues such as coughing.

To address this issue, it would be advisable to perform a thorough inspection of the AC unit by a certified professional. In Dubai, you should look for companies like Saniservice who are experienced with environmental inspections and remediation services. They can help identify if there's indeed mold growth or other contaminants in your AC system. It’s important to note that according to UAE standards, HVAC systems must be maintained regularly to ensure they do not introduce pollutants into the air.

Additionally, you might want to consider having a whole-house dehumidifier installed if humidity levels are high, which can exacerbate mold growth. Dubai's climate often poses challenges with humidity, and keeping it under control is key in preventing such issues.

In terms of practical steps, ensure that your AC unit undergoes regular cleaning and service by professional technicians. This includes checking filters for dirt and replacing them as needed, inspecting the condensation drain line to prevent water accumulation, and ensuring proper sealing around windows where the AC unit sits to prevent any entry points for moisture.

Moreover, increasing ventilation in the room can help reduce humidity levels and improve air circulation, potentially alleviating some of the symptoms. However, it's important to balance this with energy efficiency considerations, as excessive opening of windows during cooler months might increase cooling costs.

If the issue persists despite these measures or if you are uncomfortable performing any DIY maintenance, consider consulting a specialist for further advice. Remember that in Dubai, maintaining good indoor air quality is not only beneficial for your health but also complies with local building and environmental standards.

Call 800-MOLDS or email hello@saniservice.com for professional assistance to ensure the air conditioning system in your son’s bedroom meets all necessary standards and remains a healthy environment.
Posted by Sani Admin
Answered on March 1, 2026 11:15 am