Everything You Should Know About Ductless AC  

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Everything You Should Know About Ductless AC  

 Ductless AC systems (also called mini-splits) are now becoming more popular in the HVAC industry. Many people are now upgrading their AC systems from older window units to ductless AC systems.  These AC systems are capable of cooling homes and offices without ductworks. The ductless AC is more efficient, and as a result, people have embraced it as ducted AC systems had their problems.  

Furthermore, a mini-split AC is a good option for buildings without existing ductworks, as they also help in saving costs. Whereas ductworks are expensive and difficult to install. Ductless AC systems are more expensive than central AC systems, however, they are more energy-efficient. Hence, the reason why most people are upgrading their units to the mini-split system.

If you are considering changing your central AC system to a mini-split, this post is for you. Continue reading to discover everything you need to know about ductless AC systems before you install them in your home. 


What Are Ductless AC Systems? 

Ductless AC systems are cooling/heating systems, and they are smaller than the central AC systems. Ductless AC systems are energy-efficient and easy to install. They are similar to window units but are more efficient in performing their functions. More people are buying ductless air conditioners because they are more energy-efficient, make less noise, and they provide good indoor air quality. 


How Ductless AC Systems Work 

A mini-split AC system has an indoor and outdoor unit, regardless of whether it’s used for cooling or heating purposes. The outdoor unit has a condenser/compressor, and the indoor unit has an evaporator coil, blowers, and air handler. The air handling unit is placed in strategic places like the ceiling or wall through a small hole, and the condenser is installed outside the building.  

Additionally, the condenser of a ductless AC system is similar to that of a central AC system, although it is more size-efficient. It works by applying air pressure to the refrigerant lines. A flexible system connector called conduit contains refrigerant tubing. This refrigerant tubing generates a cooling effect on the air pumped by the condenser.  

Ductless AC systems can also be zoned into separate rooms. The single-zone system is designed for one room, and it comes with a single indoor unit and a single outdoor unit. The multi-zone AC system has one outdoor unit and has several indoor units. The indoor units are installed in separate areas. 


Image of how ductless AC works

Benefits of Ductless AC Systems 

Here are some benefits of ductless AC systems: 


If you are looking for an energy-efficient AC, mini-splits are your best bet. They can save up to 30% of energy which saved you the cost of high electricity bills. 

Improved Air Quality 

Mini-splits provide improved air quality as there are no ducts to accumulate debris. They are also easily accessible, which makes them easy to clean and maintain. 

Easy to Install 

Ducted systems take weeks before they are fully installed, whereas mini-splits can be installed in one day. They are flexible AC systems that are easy to install. 


What to Consider Before Buying a Ductless AC System 

If you’re thinking of buying a ductless AC system, here are some factors to consider to help you make an informed decision: 

Number of Zones 

If you are purchasing a mini-split for a business area, then a multi-zone mini split would be your best bet. A single-zoned AC is appropriate if you are planning to cool a single room. 

Impact on the Environment and Energy Consumption 

Mini-split AC systems are more energy-efficient than ducted systems.  They also contain R410A, and that makes them eco-friendly, as they have a less negative impact on the environment.  

Installation Process 

Ductless AC systems are easy to install. The units have light weights which makes them easy to mount on the wall.  A 3-inch hole through the wall can hold the indoor unit. Installing a ductless AC system shouldn’t be done by anyone, as you will need to get a professional to connect the refrigerant lines and electric wires. A professional can install the indoor and outdoor units in one day. 


Regular maintenance is necessary to extend the life span of your ductless AC system. Regular maintenance also maintains the efficiency of the system and keeps it in perfect working condition. To maintain a ductless AC system, clean and replace the air filter regularly. A professional should inspect the refrigerant and drain the condensate lines annually. 


The cost is around $3,000 to purchase and install a single-zoned system, while multi-zone systems are priced around $12,000. 


Mini-split systems typically have a warranty of up to 7 years or more. Some companies give warranties of 10 – 12 years. But, with regular maintenance and repair, the mini-split can last up to 15 years. Some components of the ductless AC system have warranties as well. 

Regular maintenance is necessary to extend the life of your ductless ac system

Smart Features 

Some mini-splits systems have built-in advanced features to meet up with the current technological trend. Here are some advanced features; 

Automation: Some brands like Mitsubishi allow an auto restart. 

WiFi:  There’s no need to use wall thermostats because some systems are produced with WiFi-enabled devices that allow you to control it using WiFi. 

Timer: The systems have timers that allow you to schedule it to your convenience. 

Variable-Speed Compressor: Variable-speed compressors helps to stop the temperature swings of the indoor units by balancing the refrigerant wave with indoor cooling temperature. 


Mini-Split AC System vs. Central AC System 

The major difference between the mini-split and the central AC is the cooling capabilities. Ducted systems can cool a full house while mini splits are channeled into rooms. But if you a lover of Mini-splits, you can get the multi-zone mini-splits for your separate rooms. 


  • A mini-split AC system can be zoned into different rooms
  • Are easy to install
  • Do not need ductwork to be installed 
  • They are energy-efficient
  • No heat loss through ducts
  • Are effective in cooling single rooms 
  • Make minimal noises
  • Do not occupy large spaces
  • Are suitable for old buildings with limited spaces



  • They are expensive to purchase. 
  • Has to maintained regularly by an HVAC professional. 
  • Limited Heating capacity. 



There you have it! Above are some of the important things you need to know about ductless AC systems. Although mini-splits may not be compatible with every building, their popularity has made businesses and homeowners adopt the system. They know the level of efficiency it provides. Consider getting a ductless AC system if you want an energy-efficient system to cool your home. 

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Don’t Be Freezin’ This Season

AC units are designed to function in specific temperatures. Running your unit when the outside temperature is below 62° causes pressure inside of your system

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