Why is my air duct sweating and how can I fix it?

Posted on Jan 18, 2019

Moisture in air ducts can cause a host of problems. In addition to causing issues with the system itself, moisture can create a breeding ground for mold and mildew. It is important to make sure HVAC systems in residential and commercial properties stays dry throughout the entire year. If you find your air ducts are damp, or get “sweaty”, follow these tips to dry out your air duct system:

Check the humidity in your home

Keeping ducts spaced apart and dry can help reduce humidity. If you live in a humid climate, consider a dehumidifier for your home.

Unblock vents

Check the areas around your vents to make sure air is able to circulate easily and efficiently. If air cannot circulate, it will vary the temperature in some areas, which may cause the “sweating” sensation for vents.

Change air filters

You should be changing your air filter regularly to keep them clean and doing their job. It is recommended homeowners change their air filters every couple months, depending on use. Homes with hairy pets or more residents might need to change their filters more often. 

Keep it clean

Have you had your air ducts serviced lately? Maybe it’s time for annual or semi-annual maintenance for your HVAC system. Contact a cleaning service for routine maintenance.

Seek professional help

Moisture in air ducts can be caused by a number of things. If you’ve tried the above tips and still find your vents “sweating” or find moisture in your ducts, it’s probably time to contact a professional duct cleaning service.  They’ll be able to properly clean your ducts or check for cracks and other flaws in the ductwork.