How Do You Stop Condensation On Air Ducts?

How To Stop Condensation On Air Ducts Review

Are you wondering how to stop condensation on air ducts? If so, you are in luck. 

In this guide, we cover:

  • What causes condensation on your air ducts?
  • Is condensation on your air ducts dangerous?
  • Is condensation on your air ducts a sign your air conditioner is malfunctioning?
  • How can you stop condensation from forming on your air conditioner ducts?

Any amount of moisture in your home can cause mold. Plus, condensation on your ductwork might mean you have a more significant problem on your hands. 

Don’t worry, though. This guide will help you figure it out.

What Does It Mean When Condensation Forms On Your Air Ducts?

Even the most efficient air conditioners create some condensation. As your HVAC system pushes cool air through the ducts, they get cold. 

The temperature in your attic or crawl space is usually much warmer than the ducts when the cold surface touches the warm air, duct condensation forms.   

If your system is running efficiently, you should not see much condensation. If there is an excessive amount of water on your ducts, it could be a sign of:

  • Airflow restriction
  • Damaged duct insulation
  • Humid air in your home 
  • Dirty air filters 
  • Warm air in your attic

Is Condensation On Your Air Conditioning System Dangerous?

Small amounts of water on your ducts are not dangerous, but if your vents sweat a lot, it can increase the humidity levels in your attic. The hot, humid environment provides optimal conditions for mildew and mold growth on the drywall and insulation.

If water droplets are rolling off your cold ducts and your refrigerant levels are low, your vents could freeze over. Ducts filled with ice are very heavy. If they get heavy enough, they could even fall through your attic.  

So, it is a good idea to check on your duct system and condensate drip pan regularly. If you see an excessive amount of water on your air ducts and in the drip pan, you may need to have a licensed HVAC technician look over your system. 

How Can You Prevent Condensation On Your Ductwork?

There are several components you need to control if you want to reduce condensation on your AC vents. You have to control your ducts’ temperature, the temperature in your attic, and the humidity levels in your home.

Old Air conditioner system next to home in need of maintenance

Reduce The Humidity Level 

If you live in a humid climate, it may be challenging to rid your home of excess moisture. However, reducing your home’s humidity levels can reduce the amount of condensation on your air ducts. 

You can use a dehumidifier in your home, which should help to make the air drier. You can also use moisture-absorbing products like Damprid to reduce the relative humidity. 

Properly Maintain Ducts

Keeping your ducts clean can help to reduce sweaty ducts and improve your home’s indoor air quality. Unfortunately, DIY duct cleaning is not advisable. 

Instead, you should have an HVAC professional clean your ducts every three to five years. If you live in an older home and your ductwork has never been cleaned, you might have decades of dust and debris built up in them. 

When debris collects in the vents it blocks airflow which can cause air conditioning ducts to sweat. 

Add Insulation If You See Metal Ducts Sweating

If you have older ductwork adding insulation can do wonders for your HVAC system, and it is a job you can do yourself if you are comfortable completing basic DIY home repairs and you have the right tools. 

The entire job should not cost you more than $300 or $400, and you will need:

  • Duct wrap or foil tape (not duct tape)
  • Duct mastic
  • A paintbrush
  • Protective gear
  • Fiberglass insulation
  • A family member or friend to assist you (optional)

For instructions on insulating your air ducts, check out this video:

Install A Vapor Barrier In Your Crawlspace 

Vapor barriers help to keep moisture out of a space. You can have it installed in your attic to reduce humid air from seeping into the attic and it may help to reduce the condensation on your ducts. 

Upgrade Your Attic Insulation

Poor insulation can cause attic temperatures to soar. Upgrading your insulation can help to prevent water vapor from your AC system, reduce the temperature in your home, and save you money on energy costs. 

When you are shopping for new insulation, look for something with a high r-value. Higher r-value rated insulation offers better protection from air leakage and performs better at blocking outside air from entering. 

Did You Know How To Stop Condensation On Air Ducts Facts

Add Attic Vents 

Most new homes have attic ventilation, which helps to keep moist air to a minimum. However, there are still a lot of older homes that do not have attic exhaust fans. 

If you live in a home without attic ventilation, adding some could help to keep your ducts drier. 

Final Advice For How To Prevent Condensation On AC Ducts

Following these DIY tips should help to keep condensation to a minimum. However, if you are having an issue with water damage from your air conditioner, you should contact a repair company. 

Letting the problem go could cause further damage to your home and HVAC system. If you need help paying for AC repairs or system replacement, a home warranty can help. 

With a service contract that covers your air conditioner, you can keep your system running well longer which should help to reduce the condensation your AC creates. Home warranties also cover ductwork and other costly systems in your home.