Inverter AC Vs Non Inverter AC: Which One Is Better

The Difference between Inverter AC vs Non inverter AC is an important thing to know because air conditioning has become an important part of our lives. This article will probe into all sorts of questions that may arise when you are thinking about buying air conditioners. It is better to know what is the best option for you before buying one.

Power consumption is an important factor that has to be looked into when you are thinking of any appliance be it a television or a washing machine or even your air conditioner! So yes, the article will also like to look into the inverter ac power consumption.

Apart from that, there are several other things that constitute the difference between inverter ac vs non inverter ac. If you have been confused over which one is more worth your money, this article has come to your rescue! Here are a few questions that we will cover in details:

  • Difference between inverter AC vs non inverter AC
  • Inverter AC Power Consumption
  • The price difference between an inverter AC vs non inverter AC
  • Advantages of using an inverter AC

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How do Air Conditioners work?

To understand inverter AC, we need to understand first, How an AC works. An air conditioner or a refrigerator works on the principle that the refrigerant takes the heat from the hot zone ( your room or refrigerator compartment) and dissipates that to the atmosphere.

When the refrigerant is in the evaporator, it is under low pressure and temperature. Also, it is in a gaseous state in the evaporator. It takes the heat from the room and then flows to the compressor.

The compressor then increases the pressure and temperature of the refrigerant gas and turns it into a liquid. That liquid then passes through the condenser tubes. While going through the condenser tube, the refrigerant dissipates heat to the atmosphere using natural or forced air circulation using a fan.

After that, the gas then again goes into the evaporator after passing through expansion valves. The cycle then continues like that.

Inverter AC Vs Non Inverter AC: Which One Is Better

A compressor is called the heart of a refrigerator. Most of the work in a refrigerator is done by a compressor. The compressor has a motor that does create the force to increase the pressure and temperature of the refrigerant. The compressor motor can be a fixed speed motor or a variable speed motor.

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What Is Inverter AC?

An inverter AC uses a variable speed motor in the compressor. It can adjust the speed according to the heat load. When the load is more, it runs at the highest speed, and when the load is less it can adjust the speed accordingly.

This type of compressor can also control the amount of refrigerant that should flow based on the load. So the work done by the compressor is optimum based on the load. Think of a car accelerator. When you need more speed, you press the accelerator and the car takes more fuel. Right?. The same logic is applicable here also.

Inverter AC Vs Non Inverter AC: Which One Is Better
Source : BijliBachao

The compressor in Inverter AC does not shut down when the desired temperature is reached. Many people have the misconception that, if the compressor is shutting down frequently, they are saving more power. But it is wrong.

Most of the energy gets wasted when the compressor shuts down and gets restarted. In inverter AC, instead of the compressor getting shut down, it optimizes the speed of the compressor motor, so that it draws less power. Overall, an inverter AC can save up to 30-50 % of energy compared to a non inverter AC.

BEE (Bureau of Energy Efficiency) has made it mandatory to show star ratings for all air conditioners including inverter air conditioners. Here is the range of ISEER (Indian Seasonal Energy Efficient Ratio) for various star rated air conditioners.

Star RatingMinimum ISEERMaximum ISEER
13.103.29
23.303.49
33.503.99
44.004.49
54.50
From 29/06/2015 to 31/12/2017
Star RatingMinimum ISEERMaximum ISEER
13.103.29
23.303.49
33.503.99
44.004.49
54.50
From 01/01/2018 to 31/12/2019
Positive
  • Variable speed compressor
  • Less power consumption
  • More efficient
  • Relatively silent
  • Good lifespan
  • Better cooling performance
Negatives
  • High price

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What Is Non Inverter AC?

Non inverter AC uses a fixed speed motor. It can not adjust the temperature based on the heat load. For example, if you set the AC temperature at 25 degrees centigrade, then the compressor will shut down when the temperature reaches 25 degrees. When the temperature goes beyond 25 degrees, the compressor will start operating again.

This frequent start and stop cause more energy loss. The fixed speed motor used in the compressor always runs either at the highest speed or at no speed. It can not run at optimum speed.

If you notice carefully, you have heard a ” Tick-Tick” sound from your AC after every couple of minutes. This is the sound of the compressor shutting down and starting again. Due to this frequent start and stop, this type of compressor makes a lot of noise

Positive
  • Low Price
Negatives
  • Fixed speed compressor motor
  • Not energy efficient
  • Makes irritating sound
  • Uneven cooling performance
  • Less efficient
  • Low lifespan

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Inverter AC Vs Non Inverter AC

There are several categories on the basis of which we have to look at it. Inverter AC vs Normal AC will bring forth certain points that you must keep in mind before you buy one.

Inverter AC Vs Non Inverter AC: Which One Is Better
Non Inverter AC
Inverter AC Vs Non Inverter AC: Which One Is Better
Inverter AC
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The Compressor Unit

The basic difference between inverter ac and non inverter AC lies in the compressor unit. It is actually the motor that makes all the difference.

The difference between inverter ac and non inverter ac is the functioning of this compressor. In an inverter AC, the compressor unit is a controllable one. So, whenever any sort of cooling or heating is required, this compressor has to act harder to either increase or decrease the output of the air conditioner.

Inverter AC Vs Non Inverter AC: Which One Is Better

In the case of a non inverter AC, the compressor is not controllable. So, what happens is that, in any case, the compressor will either work in its full capacity or it will not work at all. There is no in-between.

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The Functionality and the Efficiency

Just as the earlier point established that the functioning of the compressor is the most important difference between inverter and non inverter AC, it is natural that the second category of difference will be based on their efficiency and functionality.

As we discussed just now that in the case of an inverter AC, the compressor can be controlled. It means that the compressor speed can be controlled. If the compressor speed can be controlled then it is natural that the temperature can be controlled too. So what happens is that energy consumption is far more controlled.

You are reading: Inverter AC Vs Non Inverter AC: Which One Is Better

In the case of non inverter AC, since the compressor speed cannot be controlled, the temperature remains the same throughout. So in order to regulate the temperature, the only thing that can be done is to turn the AC off. So, if we see it in that way, in this category of inverter ac vs normal ac, an inverter AC turns out to be far more efficient.

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The Performance

This is one of the most important categories that have to be considered in the difference between inverter and non inverter ac. Again, just like efficiency, the performance of an air conditioner depends on the fact whether its compressor can be controlled or not.

Inverter AC has a controllable compressor. So temperature regulation is possible with the AC turned on. Whereas, in the case of a non inverter AC, the compressor is not controllable. So, for temperature regulation, users have to depend on turning the AC off.

The fact is that the more often the AC is turned on or off, the more is the possibility of the compressor getting ruined. So, here too, in the difference between inverter AC and non inverter AC, the inverter AC can be said to have a better performance overall.

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Noise

Inverter AC makes less noise as it does not shut down at all until you shut down the AC. Whereas a non inverter AC always makes loud sound due to frequent start and stop.

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Cooling

In an inverter AC, you will always get even cooling. This is due to the variable speed compressor motor. Whereas in non inverter AC, sometimes you will feel too much cool, and sometimes you may feel that AC is not cooling down properly.

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Realiability

Inverter AC compressors last longer than non inverter AC compressors. The life of a compressor depends on how much load you are putting on it and how many cycles it was started and stopped.

Non invereter AC compressor always runs at peak load and has a very frequent start and top cycle. So these compressors are about to die sooner than an inverter AC compressor.

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The Cost Incurred

The final point of difference between inverter and non inverter ac are the costs- both initial and subsequent.

It is true that the initial cost of an inverter AC is much higher than a non inverter AC. The reason behind it is that the inverter AC has a different compressor unit, different motors, sensors, etc, whereas, a non inverter AC does not have that.

However, it is this factor itself that also decides the subsequent costs. Inverter ac power consumption is in fact much lower than non inverter ac power consumption. It means that the electricity bills would be much lower if you use an inverter AC as compared to a non inverter AC. Besides, the maintenance cost of a non inverter AC would also be much lower since in its case, the compressor is not under too much pressure.

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Difference Between Inverter AC Vs Non Inverter AC

AspectsInverter ACNon Inverter AC
CompressorAlways OnFrequent start and stop
Power consumptionLowHigh
Cooling performanceStableUneven
Time to reach the desired temperatureQuickLate
Compressor Motor typeVariable speed motorFixed Speed motor
CostExtremely CostlyRelatively cheap

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Inverter AC Power Consumption

Power consumption is one of the most important factors that have to be considered while buying an air conditioner. Let us take a look into the matter in detail.

pic energy consumption

We already know that in the case of an inverter AC, the power consumption is lower owing to the fact that the compressor speed is controllable. But how much lesser is it really? Studies have shown that inverter ac power consumption is at least 30-50% lower as compared to a non inverter AC.

If you are looking forward to buying an inverter AC and are worried as to how it will affect your electricity bill, then the above video will definitely help you out.

The difference between inverter ac and non inverter ac becomes more prominent with its power consumption. Since the compressor speed cannot be controlled and works with the same intensity throughout, so, definitely the power consumption is much more.

BEE (Bureau of Energy Efficiency) has made it mandatory for all refrigerators and air conditioners to have the BEE energy label rating card on the product. Here is a sample of how a BEE label looks like.

Inverter AC Vs Non Inverter AC

Here is a chart showing the power consumption (KwHR or Number Of units) of Inverter AC and Non Inverter AC

# Of Stars.75 Ton1 Ton1.5 Ton2 Ton
1 Star Inverter62784312461648
2 Star Inverter59680011841626
3 Star Inverter & Non Inverter542 74711041448
4 Star Inverter4646459451293
5 Star Inverter4505548401113
The list assumes that you will be running the AC for 1600 hours a year at full load

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Conclusion: Inverter AC vs Normal AC

Finally, I would like to say that I have tried to answer the common questions that arise while one has to buy an AC. If money is not a constrain, then try to buy an inverter AC. Hope this article has helped you. However, if you have more questions, please feel free to post in the comment box below! I will reply as soon as possible!

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Frequently Asked Questions (FAQ) On Inverter AC vs Non Inverter AC

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