Could AC duct issues cause a musty smell?« Back to Previous Page

After the rain last month, I noticed a strange dampness in the air whenever I opened the bathroom window. My bedroom, which is right next to it, also picked up on this smell, even though it's not directly connected. Both areas are equipped with AC units that haven't been cleaned since we moved in two years ago. Could this be related to duct issues, and if so, who typically takes care of cleaning the vents in a rental property?
Posted by Sunita Reddy
Asked on January 7, 2026 7:36 pm
0
Yes, AC duct issues can indeed cause a musty smell. The situation you're experiencing sounds very much like a potential issue with your air conditioning system. In Dubai and the UAE, humidity levels are often high, especially during summer months or after heavy rainfalls. This can lead to moisture buildup in the HVAC system if not properly maintained.

In rental properties, it's quite common for AC units and ductwork to go uncleaned for years before being serviced. The dust, mold spores, and bacteria that can accumulate inside the ducts over time can release unpleasant odors, especially during operation. Given your description of dampness in both the bathroom and bedroom areas, there is a strong possibility that moisture has found its way into the air circulation system.

The musty smell you're experiencing could be due to several factors including mold growth within the ductwork or water damage from the rain penetrating poorly sealed joints or connections in the HVAC system. Considering your location and recent weather conditions, it would be prudent to have a professional inspection performed on both your AC units and ducts.

Local regulations in Dubai require landlords to maintain their properties' HVAC systems but do not specify how often cleaning should occur. However, for optimal performance and health, it's recommended that these systems be cleaned every 2-3 years or more frequently if you notice any issues like the one you're describing.

If you decide to go ahead with a professional inspection, you might want to contact a company that specializes in HVAC maintenance such as Saniservice. They can provide thorough cleaning services and ensure your system is functioning at its best. Don't delay too long though - addressing this issue sooner rather than later could prevent more serious problems from developing.

Call 800-MOLDS or email hello@saniservice.com for a quote on their services.
Posted by Sani Admin
Answered on January 10, 2026 11:59 am