Is musty smell due to dehumidification issues?« Back to Previous Page

After the heavy rain last month, I noticed a musty smell lingering in our master bedroom, especially during the cooler evenings. The windows fog up even with the AC running, and my wife has been complaining of stuffy sinuses and coughs, which we didn't notice before. Could this be due to dehumidification issues? What should we do to address it properly?
Posted by Junho Kimura
Asked on March 5, 2026 5:42 am
The musty smell and increased humidity levels you're experiencing in your master bedroom could indeed be linked to dehumidification issues. High relative humidity (RH) is a common culprit for mold growth, which can produce that characteristic musty odor. In the UAE, particularly in Dubai, we often see this issue exacerbated by cooler evenings and periods of heavy rainfall, as you've experienced.

According to local regulations such as EN 15289:2017, indoor environments should maintain an RH between 30% and 60%. Your symptoms—such as stuffy sinuses and coughs—are consistent with those often reported in high-humidity conditions. The windows fogging even when the AC is on suggests that your air conditioning system might not be properly dehumidifying the air.

To effectively address this, you should consider a few steps:

1. Professional Inspection: Given the severity of your symptoms and the noticeable changes in your environment, it would be wise to consult with an environmental expert or a professional mold inspection company. In Dubai, companies like Saniservice offer comprehensive inspections that can pinpoint the source of excessive moisture and determine if mold growth is present.

2. Dehumidification System: If humidity levels remain high after a thorough cleaning and deodorizing (which you should also consider), installing or upgrading your current dehumidifier might be necessary. Ensure it's capable of handling the space size of your master bedroom efficiently.

3. Air Conditioning Maintenance: Regular maintenance on your AC units can help improve their performance, including dehumidification. Check for any blockages in ducts and ensure that the system is properly installed to avoid cold air bypassing the evaporator coil, which could affect its efficiency.

4. Ventilation: Enhance ventilation by using exhaust fans during humid activities like showering or cooking. Opening windows (weather permitting) can also help lower indoor humidity levels.

5. Humidity Monitoring: Invest in a digital hygrometer to monitor RH levels continuously. This will provide you with real-time data and allow you to take corrective actions promptly if needed.

6. Regular Cleaning: Keep surfaces clean, especially those that are prone to moisture accumulation like bathroom walls and corners of the bedroom. Mold thrives on organic matter; regular cleaning can reduce its growth potential.

Remember, persistent musty smells could indicate underlying issues beyond just dehumidification. If the problem persists or worsens, don’t hesitate to seek professional assistance. For more information or a free consultation, you can contact Saniservice at 800-MOLDS (800-66537) or email hello@saniservice.com.

By taking these steps, you should be able to mitigate the high humidity and related issues in your home, ensuring a healthier environment for yourself and your family.
Posted by Sani Admin
Answered on March 7, 2026 11:09 pm