Keeping your ac ductwork clear of water and debris can provide you with cleaner air inside your home. Whether you have a professional do it or if you decide to do it yourself, some simple duct maintenance steps can help reduce the decay of your air vents while also keeping everyone healthy and breathing fresher, cleaner air.
Air duct maintenance primarily centers on preventing moisture from entering the ducts in the first place. That’s when you are left dealing with condensation on the ac vent, or even standing water in the air ducts.
Why is There Water in my Air Vents?

Water buildup in your air ducts is never a good thing. It can promote mold, bacteria and fungi growth which may cause health problems. water in air ducts, believe it or not, is not quite uncommon and can be caused by HVAC system or by other elements such as leaky pipes or leaks in your roof.
Research shows that condensation on or near cooling coils of cooling systems is a major contributor to moisture in ducts. Condensation is something that occurs naturally and is produced when the temperature of air in the HVAC system is below the temperature of surrounding air.
More advanced systems, when running as intended, have features to extract this moisture without spoiling the ductwork. Improperly installed HVAC systems, incorrectly serviced systems, and malfunctioning systems can lead to damage related to condensation on the air vents.
How Do I Prevent Water in My Air Ducts?
It’s important to know how and when to correctly manage any issues your air ducts. Calling an experienced team of water restoration specialists is always a good option. And when you want to know more about how to help solve your own issues, here are a few tips that can help you get started.
Fix all water leaks and damage promptly.
Cooling coils extract water from the air and drain pans absorb the moisture from the system. Both coils and drain pan should be inspected regularly. Drain pans should be fully emptied as standing water in the drain pan implies the pan is not working properly.
The drain pan should be free of debris and mineral deposits which could possibly exert influence on its ability to drain appropriately to release water build up in your vents. This is able to prevent any sudden and accidental damage, such as a broken pipe, that may occur if not fixed properly.
Check for Water Collecting in AC Ducts
The air duct system should be sealed off and insulated when they are in areas which are not cooled like attics, crawl spaces or garages. This helps reduce water collecting in AC ducts and prevent humid air or condensation on the duct work by lowering the temperature difference between the air within the ducts and the air directly next to the duct.
The above insulation process should ultimately lower humidity levels and prevent water build up. This is how to stop condensation on air ducts, which keeps them performing properly.
The Cooling System Should Be the Right Fit
If you are replacing your heating and cooling system, be sure the new system is well-matched to your home. An oversized air conditioner system will likely cycle on and off more frequently, reducing its ability to extract moisture from the warm air.
If the system is too small for the home, more than likely you’re experiencing very high electricity bills, it’s hard to get to a comfortable temperature, and the heat / ac cycles are running for long very periods of time. Having the right fitting heating & air system can also help you save money in the long run.
What Happens if Water Gets into My Vents?
Air ducts are like the veins of your home; they transfer humid air and cooled air throughout the building to and from the HVAC and air vents. If there is water buildup in the ac unit, it will seriously compromise the home’s indoor air quality and overall safety. Taking the necessary steps to prevent water buildup in ducts can save you hundreds – even thousands – of dollars and create a safe and comfortable space to live.
How to Get Water Out of Air Vents?
If you notice water in any vent, it’s important to examine all other boots and ducts for a possible source for the water. After examining all possible sources for water, if only one vent has been discovered with trouble then first eliminate possibilities such as over-watering houseplants or a nearby water spilling. If you cannot find anything, make note of weather conditions at time of occurrence and which vent it is, and keep an eye on the water to see if it stays in the vent, or comes and goes.
What to Do When I Have Water in my Floor Vents?
If you’re dealing with overflowing water in your floor vents, the first step is to identify where it’s coming from. Is it from a rain shower or is it a plumbing leak? Once the source of the water is located, take steps to fix the issue quickly before it damages any furniture or appliances in your home.
Depending on the severity of the overflow, you may want to call a plumber or a contractor to help shut off the main water supply if necessary. If there’s standing water overflowing from one of your vents that has already caused damage, make sure you take pictures and document everything first before starting clean-up. This will be helpful should you need to file an insurance claim later.
Why Do I Hear Water Running in my Air Conditioner?
You may hear the repetitive sound of dripping water coming from your indoor air conditioner unit. More than likely, this can mean that the condensation is not draining properly.
Why is my Ductwork Full of Water?
If you’re noticing water in your ductwork, it’s a sign of a potentially serious issue that needs to be addressed promptly. There are a few possible reasons why your ductwork may be full of water. One possible cause is condensation. When warm air passes through cold ductwork, it can cause moisture to condense and accumulate in the ducts. This can happen when the air conditioning system is not properly sized or when there are leaks in the ductwork.
Another possible cause is a clogged drain line or condensate pump, which can cause water to back up and overflow into the ductwork. In some cases, ductwork may be improperly installed or insulated, leading to moisture buildup and water accumulation. Whatever the cause, it’s important to have a professional HVAC technician diagnose and repair the issue to prevent further damage to your home and ensure your system is operating safely and efficiently.
How to Dry Out Wet Ductwork
Here are a few steps you can take to immediately begin drying out wet ductwork.
- Turn off your humidifiers, they add moisture to the air and can lead to your ducts getting wet.
- In rooms with high humidity such as an attic, use a dehumidifier.
- Find gaps in your air ducts and seal them. Do this using material such as tape or plastic wrap.
If these three steps don’t work, then you will need to call for help before the problem grows.
Need an Air Duct Cleaning or Repair?
Air ducts are like the veins of your home; they transfer heated and cooled air throughout the building to and from the HVAC and air conditioning vents. If there is water buildup in your home’s air ducts, it will seriously compromise the home’s indoor air quality and overall safety. Be sure to contact Jenkins Restorations for further assistance.
Taking the necessary steps to prevent water buildup in ducts can save you hundreds – even thousands – of dollars and create a safe and comfortable space to live. While it may seem easier to clean out your own air ducts, it’s best to contact a professional to get more information and make sure things are done properly.
Frequently Asked Questions
How do you stop condensation on ductwork?
The best way to prevent condensation from forming on ductwork is to keep the air temperature above the dew point. If the air temperature is below the dew point, then moisture will form on the inside of the ductwork. To prevent this, you should use a humidifier to increase the humidity level in the air.
What to do with water in floor vents after heavy rain?
After heavy rains, it is important to check your floor vents for any water or moisture build-up. If there is standing water in any of the vents, you should take appropriate steps to address the issue and prevent further structural damage.
One thing to try is utilizing a wet/dry shop vacuum cleaner to remove all of the water; just regular vacuums typically won’t work in this situation. A dehumidifier can be used as well in order to help evaporate any leftover moisture.
Will wet duct insulation dry out?
Wet duct insulation dries out when exposed to air for long periods of time. This is why it is important to install duct insulation during the winter months.
How to fix water leakage in split ac?
Water leakage in split air conditioners is caused by a leaky compressor. If you suspect that your unit has a leaky compressor, you should contact a professional who can inspect the unit for leaks.
How to dry out air handler insulation?
The best way to dry out air handler coils is to use a dehumidifier. Another option is to set your air handler’s fan switch to on. The constant moving air will help to dry out the air handler insulation.
What causes condensation on AC vents?
The main causes of condensation on your AC vents include temperature differences between outside air and your vent, your AC ducts being improperly sealed, lack of insulation around your ducts, dirty air filters, or even too much air moisture.
How long to let air conditioner dry after cleaning it?
Allow the air conditioner to dry for at least 1 to 4 hours after cleaning with a damp cloth. For more extensive cleaning, especially involving coils or cleaning solutions, wait at least 24 hours before turning it back on.