Dirty cooling coils means the airflow is restricted, so you’ll end up with a colder temperature at the grille and again increasing the chance of sweating. Has your ducted air conditioner system been serviced? The indoor coils of your system might be blocked or dirty.Having a clean air conditioner filter allows your family to breathe fresh air all year round. If not cleaned regularly, your filter can clog, causing it to collect moisture and eventually grow mould. Filters inside air conditioners catch dust particles to avoid you breathing it in. Dirty filters mean a colder temperature at the grille and an increased chance of your air conditioner sweating. Are the filters clean? Your filters should be cleaned every three months and more regularly during the summer months.Is the unit set to a reasonable and achievable desired temperature for the day such as the recommended 24☌? Doing so gives the unit time to cycle/turn OFF for a period allowing the grille temps to warm back up and prevent them from getting too cold.Smarter Air sets two constant zones for all systems less than 14kW and 3 for larger air conditioners as often recommended by Advantage Air. Do you have a minimum of 2-3 zones ON & OPEN? Typically set up by your air conditioning contractor and referred to as constant zones.Are all of the windows and doors shut properly (including the rooms you are not using).If you are using your system correctly sweating should not be a problem, if it is we need to do some investigating! Plastic grilles is a better alternative as they are less conductive than metal.Ĭhecklist to Avoid Air Conditioner Sweating Metal grilles are more likely to cause sweating. The material of the grilles can also impact the amount of condensation/ dripping water that comes off your air conditioner. As this temperature is lower than the dew point, air conditioner sweating may occur once the metal/plastic grille drops below this temperature. In this example, the standard temperature difference would lead us to a supply air temperature of 18.5☌. Now we understand that if the external surface of the ducted aircon grilles in our home gets colder than 22.5☌, we can expect water vapour to form and turn into a liquid.Ī ducted air conditioner typically provides a 10-12☌ difference in temperature between the air getting sucked through the return air filter grille and the supply air temperature coming out of the grille in your living room. Let’s say it’s an average February day and take a look at the dew point temperature. As our air conditioner is set to 22☌ and won’t be running for a long time, the grilles don’t have the chance to sweat.įebruary is the most humid month in Brisbane and also the month when most homeowners experience air conditioner sweating problems. So, if the external surface of the ducted aircon grilles in our office gets colder than 21.8☌, we could expect water vapour to form and turn into a liquid. Take a look at our indoor observations below after we closed all the windows. Let’s go through an example, at our office today we have just closed all the windows & turned the air conditioner ON. In your roof space where it’s much hotter the dew point temperature is also much higher, this means that sweating of the ducts and other air conditioning equipment is more likely to occur. Simply put, if the surface of your air conditioner grille is below the dew point of the room, then moisture will begin to form. The dew point temperature is the temperature at which water vapour will begin to form and turn into liquid. Sweating is likely to occur when the air temperature is below the dew point temperature. high Humidity Causes Ducted Air Conditioner Grilles to SweatĪir conditioner sweating occurs when humid air in the home makes contact with the cold surface of the ducted air conditioner grille. We’ll explain what causes air conditioner sweating, why it hasn’t happened before, and the methods of prevention so you can feel at ease and say goodbye to those pesky water stains.ġ. Well, you’re not alone, many other Brisbane homeowners have the same problem during the most humid months of the year! It can be an extremely frustrating problem, but it helps to know the facts. Have you noticed dripping water or water stains surrounding your ducted air conditioner vents? So why is your air conditioner sweating?
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