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What is Split System Dry or Dehumidify mode?

If you’re a Victorian local, you’re probably well aware of how unpredictable the weather can be. One day it’s hot and humid, the next it’s cold and rainy. This means that your split system air conditioner (AC) might be working overtime to keep you comfortable, but did you know that many models come with a “Dry” or “Dehumidify” mode that can significantly improve your indoor air quality and comfort?

In this blog, we’ll explain what Dry Mode is, the benefits it offers, and when to use, and not use, it.

Rinnai Wall Mounted Split System Air Conditioner Indoor Unit

What Is Dry Mode on a Split System Air Conditioner?

Dry Mode is a setting on many modern split system air conditioners designed specifically to reduce humidity in your home.

Unlike the regular cooling mode, which simply cools the air, Dry Mode focuses on removing excess moisture from the air, making it less humid and more comfortable.

This mode works by cycling the compressor on and off more frequently, allowing the system to extract moisture from the air.

It cools the room to some degree, but its primary focus is to reduce the humidity levels, which can be just as important as controlling temperature, especially during Melbourne’s more humid months.

When Should You Use Dry Mode?

If you’re experiencing muggy, sticky conditions inside your home eg damp floor tiles—whether because of an unexpected humid day or heavy rainfall—you might find that your usual cooling settings don’t provide the comfort you’re looking for. Dry Mode is perfect for these scenarios, and here’s when to use it:

Humid Days

After a warm and humid day, or following heavy rainfall, when you can feel the moisture hanging in the air, Dry Mode will help make your living spaces more comfortable.

Mould Prevention

If you live in a place that tends to get damp or you’re worried about mould growth in bathrooms, kitchens, or basements, Dry Mode can help prevent excess moisture buildup. You can also open up wardrobes to ensure moisture is removed from areas where clothing is stored.

Nighttime Comfort

If you want a cooler, less humid environment while you sleep, Dry Mode can help you rest more easily without the discomfort of sticky air.

Benefits of Using Dry Mode

Reduced Humidity for Better Comfort

Humid air can make a room feel warmer and less breathable, even if the temperature is not that high. By using Dry Mode, you’ll reduce humidity, which can make your space feel cooler without dropping the temperature drastically. You’ll avoid the discomfort of sticky skin and stuffy air, especially during Melbourne’s muggy summer nights.

Improved Air Quality

Excess moisture in the air can lead to dust mites, allergens, and mould. By using Dry Mode regularly, you’re actively working to lower the moisture level in the air, which can significantly improve indoor air quality. This is particularly beneficial for those with asthma, allergies, or respiratory conditions.

Mould and Mildew Prevention

Melbourne’s climate—particularly during the colder, wetter months—can create the perfect conditions for mould growth. Excess moisture can cause mould and mildew to thrive, especially in hidden or hard-to-ventilate areas like bathrooms, laundry rooms, or basements. Running your split system on Dry Mode helps to control these moisture levels, reducing the risk of mould and the damage it can cause.

Energy Efficiency

While the main focus of Dry Mode is humidity control, it can also be more energy-efficient than running the air conditioner in cooling mode all the time. Since Dry Mode doesn’t need to maintain a low temperature, it uses less energy, making it a more economical option for dealing with humidity.

Prevention of Condensation

On cooler days, condensation can form on windows, walls, or other surfaces due to the indoor air’s high moisture content. By using Dry Mode, you can prevent this issue, keeping your windows clear and avoiding the dampness that can lead to water damage over time.

How to Use Dry Mode Effectively

Set the Desired Temperature: When using Dry Mode, it’s important to not set the temperature too low. The focus is on reducing humidity, not cooling the air drastically. Aim for a comfortable room temperature between 22°C–24°C for optimal results.

Keep Windows Closed

For Dry Mode to be most effective, make sure your windows and doors are closed. This helps the air conditioner to maintain control over the indoor humidity levels.

In conclusion

Whether it’s a muggy day in the middle of summer or the result of heavy rainfall, Dry Mode on your split system air conditioner offers a simple solution to help you manage the humidity levels in your home. Not only does it improve comfort, but it also enhances air quality, prevents mould, and saves on energy costs.

So, the next time you’re feeling uncomfortable due to high humidity, consider switching your AC to Dry Mode. Your body will thank you, and your home will feel fresh and comfortable—perfect for the ever-changing Melbourne climate.

  • When to use: to reduce humidity in the air
  • When not to use: when you want to cool the room

Split System Maintenance

Keep your air conditioning system well-maintained. Regular servicing, including cleaning the filters, ensures that the system works efficiently and removes humidity properly.

Make sure you clean your indoor filter every 2 weeks to ensure it doesn’t get blocked. See our easy step by step video on how to clean your split system indoor filter.

And remember to get it serviced every 2 years, book a professional Split System Service with a refrigerated cooling technician online.

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