How Do Ductless Air Conditioners Work?

Ductless air conditioners are a fantastic alternative to traditional units because they require no ducts. They’re installed inside your home on the walls or ceilings. When you turn on the unit, it will cool your home by using a refrigerant to cool air and circulate the cool air throughout your room.

An Evaporator Unit

An evaporator unit is used to remove moisture from the air and deliver it to the outdoor system. It works with an evaporator coil that absorbs heat from the air being cooled and transmits it to the refrigerant. A blower fan is used to circulate the air throughout the room.

A Condenser Unit

It takes in the refrigerant gas and removes heat from it in a heat exchanger section. The heat is transferred to outdoor air. A fan blows the outdoor air over the coils and after absorbing heat. A compressor raises the pressure of the refrigerant and circulates it through the system.

A Conduit

It is a rigid connection between the condenser and evaporator units, used as a corridor to deliver refrigerants. It contains a drain line, refrigerant tubing, and an electric line to power the indoor and outdoor units. The drain line carries out the excess moisture from indoors.


A thermostat is used to regulate and control the temperature in a room. The thermostat of a ductless system has its management module, which includes an indoor sensor.

The sensor on the indoor unit monitors the temperature in your house by sensing the air that comes through it. When the indoor sensor senses a temperature increase, it instructs the module to turn on. Once your power unit is on, the blower fan in your indoor unit will circulate air throughout your room while the compressor begins to function.

The thermostat sensors compare the temperature of the air to the set temperature. The sensor will activate the compressor if the air is warmer, and the system will begin to cool the room. If the air gets cooler, it shuts off the compressor. This added convenience and energy efficiency make ductless air conditioning technology a very attractive option for most homes.

How Does It Work

A ductless air conditioning system has a condenser outdoor unit, an indoor evaporator unit, a conduit, and a blower fan. A warm or hot room is cooled by heat transfer. The heat absorbed by the refrigerant in the evaporator unit is sent outside your home through the condenser unit.

A fan draws in air and blows it over the coils. The refrigerant passes through the evaporator coils located in the indoor unit. It absorbs heat from the indoor air and evaporates as it passes through the coils. Cool air is distributed throughout the room by a blower fan. The refrigerant passes through a refrigerant tubing to the condenser.

A compressor is used to pressurize the gas and help the thermal heat transfer process more efficiently. A fan draws air from the environment and blows it over the condenser coils. As the refrigerant passes the coils, heat is transferred to the outdoor air, and it changes from a high-pressure gas to a high-pressure liquid.

The high-pressure liquid then passes through an expansion valve that reduces the pressure in the liquid refrigerant. This results in the lowering of the temperature of the refrigerant. It then goes back to the evaporator unit, where the cycle continues.

How Does a Refrigerant Work

A refrigerant works by absorbing heat and transferring it to the outdoor environment. The refrigerant changes from a liquid to a gas by absorbing heat. The heat is supplied through coils in the evaporator unit of your ductless air conditioning system. The refrigerant passes through the evaporator unit at low pressure and low temperature and absorbs heat, causing it to evaporate into a gas.

The gas then enters the condenser unit. A compressor increases the pressure. As it passes through the coils in the condenser, it transfers heat to the colder air outside of your home. It returns to a liquid state and travels back to the evaporator, where it repeats this process over again, cycle after cycle.

What Are the Advantages of a Ductless Air Conditioning System

1. It is energy efficient. Ductless air conditioners require only a fraction of the energy that traditional central systems use. The energy reduction is because there are no ducts or venting required, which means less heat loss.

2. It saves on space. They are much smaller and take up less space than central units. You can place them in any room that needs cooling. They are effective for adding to a room if you live in an area that gets hot, humid summers.

3. They are quiet. You will not hear a loud fan running constantly, and they are more efficient at cooling a room. They are very quiet and do not run constantly like central systems.

4. It has flexibility. Ductless air conditioning systems are very flexible and can be used for various applications, including home additions, new builds, food service, health care, etc. This versatility makes it an excellent option for businesses that want to install them in several different locations throughout their building.

5. Easy to maintain. Ductless air conditioning systems require less maintenance, which is good news for those who have to do it themselves or those who are busy and don’t have the time to deal with it.

6. It’s environmentally friendly. Most ductless air conditioners recycle the refrigerant into liquid form after cooling hot air in your home. They also use outside sources of energy such as electricity and solar power to do their work.

7. Easy to install. They are easy to install because they must be plugged into an outlet like any large appliance. There are no special tools or other specialty equipment needed.

8. It is safer. There is no risk of an electrical shock because no high voltage wires or cables run through your home. You need to plug in the unit and turn it on.

9. Ability to connect multiple units. It is easy to add to ductless air conditioning systems. This makes them an excellent choice for those who want to add more cooling to their home when it gets hot during the summer or add on more units to cool larger house sections.

10. It is cost-effective. Ductless air conditioning systems are a cost-effective alternative to traditional central cooling. They are more affordable in the short term and more efficient long term.

In conclusion, although there are more and more ductless air conditioners available today, the best place to purchase them is a reputable dealer who has experience installing and maintaining these units. A dealer is required to sell and service these units. We at Level 9 Heating & Cooling deal in ductless air conditioners. We offer air conditioning and heating services in Washington, St. Louis, and the surrounding areas. Contact Level 9 Heating & Cooling today for more information.

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