It happens because the warm humid air outside the ducts leaks inside where it comes into contact with the cold duct walls.
Floor vents under window cause outside condensation.
Condensation occurs only when humid air is in contact with a cold surface.
Since there is lots of humidity near the air conditioner vent the chance of condensation forming is likely to happen.
But windows are often the first place where condensation can be seen.
You should use the amount and severity of window condensation as a sign that moisture damage may be taking place inside your walls or ceiling cavities.
New double triple glazing tends to retain far more heat within the home minimising the time your heating needs to be on as well as keeping rooms at a more stable internal temperature.
Windows do not cause condensation they just happen to be the place where moisture is most visible.
Spend the time to have the problem addressed professionally.
There are a lot of reasons why this happens but there s only one cause.
If you have hvac ducts made of sheet metal with no insulation or ducts with damaged insulation you re much more likely to develop condensation inside the ducts and also condensation on the ac vents.
New windows also tend to help reduce condensation on the glass.
This happens with your air conditioner because when you have cold air and cold vents but hot air on the outside condensation will form.
The temperature can also be the cause of condensation forming.
Luckily this issue can be treated and corrected.
If you have ductwork for your hvac system under your house have it inspected for any air leaks and to make sure it has enough insulation to prevent condensation on the outside of the ducts when the air conditioner is running during the summer.
Nobody wants moisture to turn into mold or mildew in their air ducts.
Your car windows fog up in humid weather or in winter when you have several passengers.
Let s start with the cause.
We have discussed this before but new windows are normally a fantastic way to improve both the appearance and thermal comfort of your home.
Water vapor that drops out will come in contact with cold surface.
Leaky or uninsulated ductwork.
That is when the air conditioner vents sweatingand condensation will form.
And the sooner the better.
The dew point temperature.
If your air conditioner supply vents are sweating you have a cold surface the vent and near it you have air with water vapor in it.
Think about it you re probably not surprised or concerned when your bathroom mirror becomes fogged after a hot shower.