What is a Dual Inverter AC?

Dual inverter technology is one of the latest innovations in the air conditioner’s vertical. Some of us are already aware of this technology. However, most of them aren’t.

If you want to know more about this technology before considering whether it is worth to invest or not, then this is for you.

We have provided all the necessary information in this article like how it works, benefits and others.

Read it thoroughly to understand whether it fits into your set of requirements or not.

Table of Contents

What is Dual Inverter AC?

How Does a Dual Inverter AC work?

What Is the Difference Between Dual Inverter AC and the Inverter AC?


What is Dual Inverter AC?

A dual inverter AC is an advanced version of the inverter AC. As the name says, air conditioning units with dual inverter technology come with dual rotary compressors. These cooling devices are more promising than the normal inverter ACs.

How Does a Dual Inverter AC work?

We all know that a compressor is a crucial part of the air conditioner. In ACs with single inverter technology, the single-cylinder compressor operates at variable speeds. Although this technology saves power consumption, it may generate a lot of vibration and create noise when operating.

Coming to the dual inverter ACs, they come with twin rotary compressors and a highly developed BLDC motor. These compressors consist of two impellers and rollers for the compression. When the two impellers run, they operate at the same rotation speed, delivering the same amount of compressed refrigerant as in the single inverter. This technology enables mutual compression timing, enhances lower rotation speed, and stable operation.

Let us say your AC unit performs at its peak when operating on 8000 RPM. With dual inverter technology, it will reach its peak performance at just 700 RPM. As a result, these devices attain unstable tonnage.

There are many AC brands available in the market manufacturing AC units with twin compressors. The popular appliances brand, LG, named them dual inverter ACs.

What Is the Difference Between Dual Inverter AC and the Inverter AC?

Dual Inverter AC Vs. Inverter AC

How is a dual inverter AC different from the inverter AC? Here are some distinguishing features that will help differentiate both devices. Let us take a look at those factors:

a) Lower Energy Consumption

We all know that inverter ACs consume less power. However, the dual inverter air conditioners utilize less energy when compared to the inverter AC with a single rotary compressor. This is much lesser when you consider the non-inverter ACs.

As mentioned earlier, the dual rotary compressor provides the same amount of compressed refrigerant while operating at lower speeds. As a result, it requires just half of the RPM as the simple inverter unit.

Since the two impellers operate at slow speeds, they require low motor operating speed. Thereby, they consume less power and increase the efficiency of the AC unit with dual inverter technology.

Because of the dual rotary compressor operation, the tonnage of AC varies when operating. This guarantees energy efficiency and minimizes power consumption. This further increases the lifespan of the device.

Did you know that using dual inverter AC you can save up to 70% of energy consumption when compared to the non-inverter unit?

If we consider the dual inverter technology AC unit from LG, it claims to be highly energy efficient. When you compare the 5-star split AC, the most energy-efficient cooling device in the market to the LG’s 1.5-ton dual inverter air conditioner, you can save more than 830 units of power consumption.

This would help you save about ₹6000 annually. Hence, a dual inverter AC is more energy-efficient than the air conditioner with a single rotary compressor.

b) Better Cooling

Let us try to know which device delivers better cooling. The compressor of an inverter AC uses the BLDC motor. When operating, this motor varies the speed of the compressor according to the requirement. The inverter AC compressors run at variable speeds, thereby offering better temperature control.

When it comes to the dual inverter ACs, these are an advanced version of the inverter ACs. The dual inverter compressors use highly advanced BLDC motors.

The twin rotary compressors have two impellers and rollers for the compression. When the two impellers run, they deliver the same amount of compressed refrigerant as in the single inverter. This technology compresses and delivers more amount of air per revolution when compared to the AC with a single rotary compressor. Consequently, for the same RPM, the dual compressor in the cooling system delivers double output.

LG claims that its dual inverter AC provides 40% higher cooling than the air conditioner with a single rotary compressor.

c) Minimized Vibration and Stable Operation

An inverter AC typically has a single roller on the shaft that rotates inside the compression chamber. As a result, there could be an imbalance in the rotational masses.

During rotation, the centrifugal force directs the shaft towards the roller. Whenever the rotation speed increases, this force will also increase. This results in the vibration and further limits the RPM rate of the compressor.

If we talk about the dual inverter ACs with twin compressors, they have two impellers. This guarantees balanced rotational masses on either side of the compression chamber. Moreover, these both impellers come positioned on the same side of the rotor shaft with a 180-degree phase difference. Hence, there is a balance in the centrifugal force, further resulting in reduced vibration and better stability during the operation of the unit.

d) Less Noise

As discussed earlier, the normal inverter ACs uses a single-cylinder compressor that operates at variable speed. Whenever it rotates at a high speed, it generates more vibration, thereby creating a lot of noise. Hence, you can observe increased noise levels, when the shaft whirs at its full capacity.

On the other hand, the dual rotary compressors in the dual inverter ACs rotate with a 180-degree phase difference. This facilitates the uniformness of the impellers when the compressor is operating at full capacity. As a result, there will be more stability, minimized vibrations, and whirring. Ultimately, there will be lesser noise produced.


I hope this article gave you complete insights into what a dual inverter air conditioner is and how it works. You must now have an understanding of the benefits of these units and how are they different from the normal inverter ACs and the non-inverter ones.

Let us know in the comments section below if you have any queries or need more information on the same. You can add your inputs to this article and let us know if we missed out on any points.

Your feedback matters a lot to us, and we would love to hear and learn from you.

Stay healthy and stay safe!!!



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