High humidity causing stuffy nose and AC issues?« Back to Previous Page

Yes, absolutely. That 75% relative humidity reading is a significant red flag and is almost certainly the primary culprit behind your symptoms and the AC's performance issues. Here in the UAE, our HVAC systems are designed to dehumidify as they cool. When humidity levels are that high indoors, it indicates a failure in that process.

Your stuffy nose and scratchy throat are classic signs of exposure to a damp environment. High humidity promotes the proliferation of dust mites and mold spores, both potent allergens and irritants. That faint damp smell in your wardrobe is a telltale sign of microbial growth (mold/mildew) beginning, likely feeding off the organic material in your clothes and the furniture itself.

The constantly running AC is a key symptom. It's likely overworking to try and achieve the temperature setpoint but is failing to properly condense and drain the excess moisture from the air. This could be due to several issues specific to our region: an undersized unit, a clogged drain line (extremely common here due to dust and biofilm), low refrigerant charge, or a faulty evaporator coil.

For a single room, start with these steps: 1) Ensure the AC drain line is clear. You can often hear water flowing if it's unobstructed. 2) Check and clean the air filter; a dirty filter drastically reduces airflow and dehumidification capacity. 3) Keep the bedroom door closed to isolate the space. 4) Consider a small, standalone desiccant dehumidifier as a temporary measure.

However, given the symptoms and the humidity level, this likely requires professional attention. The mold growth you're smelling needs to be identified and addressed to prevent health issues and material damage, which is regulated under strict UAE indoor environmental standards.

I strongly recommend a professional inspection to diagnose the root cause of the AC's failure to dehumidify and to assess any microbial contamination. Please call our specialists at 800-MOLDS (800-66537) or email hello@saniservice.com for a comprehensive assessment.