How Does Ductless Air Conditioning Work?

How Does a Mini Split System Work?

If you are looking for targeted Heating and cooling, consider ductless air conditioning. Let's Look at how they are beneficial. 

Commonly referred to as Mini Split Air Conditioning Systems, ductless air conditioners are super easy to install and require no ductwork, like in its name.

Ductless air conditioners are convenient because you can actually install it yourself if you know what you are doing.

You can call a HVAC professional just to confirm you installed it correctly. 
Or you can also call a professional to come do it for you. 

Many homes will use a Mini split for a section of the home that does not have central HVAC attached to it.

This could be an addition that was added on after the central system was installed or maybe a porch area or separate building that could not have ducting connected to it.

​As Mini splits grow in popularity more homes have started using them to heat and cool the entire home.

Components of a ductless air conditioner 

Mini Split AC systems are made out of two components. They do not require ductwork throughout the house like a conventional air conditioning system. 

1. Inside Unit
2. Outside Unit 

Indoor unit 

The indoor unit includes an evaporator coil & fan that are in the same enclosure. The indoor AC system can either be a single-zone ductless mini split air conditioner or it could be multi-zone. Each indoor unit is able to provide separate air conditioning though they are all connected to the same outdoor unit.

Outdoor Unit

Outdoor unit includes three parts: 

1. compressor 
2. condensing coil 
3. Fan 

How does a mini split ductless aiar conditioner work?

During the refrigeration cycle, the compressor converts low-pressure gas into a high-pressure gas.

The forced air fan then dissipates the heat outdoors. Next, the refrigerant becomes a high-pressure liquid which is once again changed into a low-pressure liquid by a metering device located at the evaporator coil.


The refrigerant absorbs the heat energy that is indoors and the mini split’s internal blower pushes cooler air into the house.
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When the refrigerant in its liquid state absorbs the heated air, it becomes a low-pressure gas that moves through the suction line and back to the compressor. A cycle begins. 

Mini Split Vs. Multi- Split 

Mini- Split System

A mini-split has a single outdoor condenser and a single indoor fan coil. This configuration is perfect when cooling a single room that does not have excessive load requirements.

In case there is enough space to place more than one condensing unit outdoors, several units may be used together to provide cooling for a whole building.

When you use this kind of installation, you will have separate temperature control for each unit.

​This is beneficial because in case there is a malfunction in one of the units, the rest will not be affected and will continue to work.
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Multi- Split

A multi-split system comprises of one condenser unit that is connected to more than one indoor air handler. T

his configuration uses a thermostat to select an indoor. Once a call for cooling is made, all the units are activated simultaneously. Even though this configuration is cost-effective, it should only be used in buildings where every room has the same cooling load.


In order to achieve zoning using a multi-split ductless air conditioning system, the condensing unit will have to be fixed with individual compressor circuits that are piped to separate air handlers.
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Using multi-split AC systems allows occupants of different rooms to regulate the temperature of each separate room using a thermostat for that room.

How to hire a ductless air conditioning professional in Sacramento, Ca. 

Hiring a HVAC professional company to help with your ductless air conditioning solutions should add to the enjoyment you will receive from the results of your working system.  You have little to lose and tons to gain. ​​

Kingdom Heating, Air & Construction are professional AND experts in finish carpentry. 

Learn more about Kingdom's Mini Split AC on our page.
Call (916) 318-3080 to book your appointment today!

We will come check out your home and give you an estimate for your project.