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How To Eliminate Humidity With Ductless Air Conditioners

How To Eliminate Humidity With Ductless Air Conditioners

Ductless air conditioners are capable of removing humidity by cooling the air and eliminating moisture. They distribute cold or warm air evenly, resulting in a more pleasant room temperature. You have the option to control both the temperature and humidity of your home by selecting either the ‘cool’ mode or the ‘dry’ mode.

If your home already has a cool temperature and you want to create a more comfortable and breathable environment, you can use the ‘dry’ mode to remove humidity. On the other hand, if your home has excessive humidity and hot air, the ‘cool’ mode is suitable. Ductless air conditioning systems absorb moisture and blow cool air, enhancing the comfort of your house.

If you’re planning to install ductless air conditioners, it’s important to understand how they work in order to maximize their efficiency in creating a pleasant environment in your home.

Understanding Ductless Air Conditioners

A ductless air conditioning system consists of one main outdoor unit and one or more indoor mini-split units connected through refrigerant tubing and electric wiring. The indoor units cool or warm individual rooms without the need for ductwork.

Compared to traditional AC units with ductwork, ductless air conditioning systems are easier to install and provide better control over the humidity levels throughout your entire home.

Ductless air conditioning systems, or mini-splits, are separate units placed in each room and connected to an outdoor compressor. These units have evaporator coils with refrigerants that cool the air, while absorbing warm air and transferring it to the main outdoor processor.

Ductless ACs are a superior alternative to traditional air conditioners because they operate with heat pumps that can efficiently warm or cool the room according to your needs. Additionally, they are quieter and more energy-efficient than regular air conditioning systems. By using ductless mini-splits, you can reduce energy consumption by up to 30%.

After installing the main outdoor unit, you have the option to choose from various indoor units such as ceiling cassettes and wall-mounted inverters.

How Do Mini-Splits Remove Condensation?

How To Eliminate Humidity With Ductless Air Conditioners

Condensation occurs when the air reaches its dew point and the vapor turns into small water droplets. Mini-splits have drain pipes that transport the water to the outdoor processor.

The refrigerant pumps and absorbs heat from the indoor coil until it reaches its dew point, causing the moisture to condense into water droplets. These droplets fall into a trench inside the mini-split unit and are then directed into the drainpipe, which transports them to the outdoor processor or the main unit.

How Much Humidity Can A Mini-Split Remove?

A mini-split can effectively remove humidity levels ranging from 45% to 55%. To enhance the dehumidification process in an inverter mini-split, set a higher temperature with a low fan speed and allow the system sufficient time to remove moisture from the air.

Is The AC Dry Mode Beneficial For Health?

Humid air can negatively impact your health, as it creates an ideal environment for harmful viruses and bacteria to thrive. A dry air conditioning system helps absorb humidity and transforms it into cool, dry air, reducing the likelihood of airborne viruses in your home.

Is It Cheaper To Run A Dehumidifier Or An Air Conditioner?

How To Eliminate Humidity With Ductless Air Conditioners

Dehumidifiers consume less energy and are more cost-effective than air conditioners. They are designed to reduce moisture levels, making them useful in hot weather. However, dehumidifiers do not directly reduce the temperature. To cool the air, you will need an additional appliance such as an electric fan or an air conditioner, which will increase energy usage.

This is where ductless air conditioning systems offer an advantage. These systems can both dehumidify and cool or warm the air. The choice between a dehumidifier and an air conditioner depends on factors such as your location, budget, house design, and climate needs.

Advantages Of Ductless Air Conditioning Systems

  • Mini-splits equipped with heat pumps can warm rooms in winter and cool them in summer.
  • Mini-splits do not lose air through ducts and leaks, resulting in energy savings of up to 30%.
  • You have full control over the temperature in each room.
  • They are quieter than regular air conditioning systems.
  • Temperature and humidity can be easily adjusted in each room using remote controls.
  • Installation is less complex, and maintenance is simpler compared to centralized air conditioning systems with ductwork.

Disadvantages Of Ductless Air Conditioning Systems

  • Ductless air conditioning systems are generally more expensive than regular air conditioning units.
  • The filters need to be cleaned at least once a month to remove dust and debris.
  • In extremely cold regions, a fuel backup may be necessary to operate the ductless heat function.

What Size Of Ductless Air Conditioning System Do You Need?

There are affordable mini-splits available on the market to suit various needs, budgets, and room sizes. Choosing the right size is crucial to ensure optimal functionality of the system.

Simply measure the size of the room, including any cabinets, and refer to the ideal BTU (British Thermal Unit) capacity listed below:

  • Space: 150 to 250 square feet – BTU Capacity: 6,000
  • Space: 250 to 300 square feet – BTU Capacity: 7,000
  • Space: 300 to 350 square feet – BTU Capacity: 8,000

Before purchasing your equipment, it’s advisable to consult an installation expert to determine the appropriate BTU capacity for your specific needs.

Tips For Using A Ductless Air Conditioning System

How To Eliminate Humidity With Ductless Air Conditioners

Proper maintenance is essential to prolonging the life and functionality of your ductless air conditioning system. Neglecting maintenance can result in decreased performance and potential issues.

  • Weekly dust the exterior of the units to prevent excessive buildup, which could affect their operation. Use a damp cloth or cleaner to wipe the exterior surfaces. Ensure that the vents are free from dust and debris to prevent clogging.
  • Keep other furniture and appliances at a distance from the AC units, as every device requires sufficient airflow for optimal performance.
  • When cleaning the system, turn it off to avoid any potential electrical hazards and to protect the unit from damage.
  • Cleanse the filters at least once a month by removing them and wiping them with a clean, dry cloth. Dust accumulation in the AC system can cause allergic reactions and respiratory problems.
  • The unit’s coils can be washed using a garden hose to spray off any dirt or debris.
  • Regularly clean the pipes to prevent clogging caused by debris, dust, and particles.
  • Schedule an annual check-up by a professional to ensure the ductless air conditioning system is functioning properly. Just like humans, appliances require periodic check-ups to maintain optimal performance.
  • Check for air leaks in your rooms. It is not advisable to use large equipment if there are leaky holes compromising the system’s efficiency.


A mini-split air conditioner can contribute to healthy air quality and provide a comfortable atmosphere. These units effectively remove humidity from the air when set to the appropriate mode based on the conditions in your home, either ‘cool’ mode or ‘dry’ mode.

How To Eliminate Humidity With Ductless Air Conditioners

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Written by HVAC Contributor

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