Are you looking for the best AC for your home this summer? You’ve come to the right place. In this article, you will find the answer to all your AC related questions, along with a list of 9 best air conditioners in India chosen by our experts.
In India, the summer season starts from the beginning of April and continues until the end of July. At this time, in some parts of India, the temperature even rises to 42° C. When you feel exhausted in intense heat, an AC can give you heavenly comfort.
An air conditioner is a big purchase. You certainly won’t buy an AC every year. After buying an AC, you expect it to provide seamless, trouble-free performance for at least the next ten years. So as a buyer, before purchasing an air conditioner, you should carefully consider various factors and then make a decision. So we highly recommend you to read through the buying guide section at the end of this article.
Table of Contents
- These Are The 9 Best air conditioners in India 2020
- 1. LG 1.5 Ton 5 Star Dual Inverter Split AC
- 2. Daikin 1.5 Ton 4 Star Inverter Split AC
- 3. Carrier 1.5 Ton 5 Star Inverter Split AC
- 4. Voltas 1.5 Ton 5 Star Inverter Split AC
- 5. LG 1.5 Ton 3 Star Inverter Split AC
- 6. Hitachi 1.5 Ton 5 Star Inverter Split AC
- Working principle of air conditioner
- What is the tonnage an AC?
- Electricity usage of an Air Conditioner
- Best air conditioners in India 2020 – Buying Guide And Tips
These Are The 9 Best air conditioners in India 2020
1. LG 1.5 Ton 5 Star Dual Inverter Split AC
LG is an established name in the world of electronics. Today LG is a famous home appliance brand not only in India but all over the world. It is a brand that is highly trusted, and you never have to worry about product quality and functionality. Our list of best air conditioners in India starts with LG 1.5 Ton 5 Star Inverter Split AC. The product comes with several great features. Let’s briefly discuss some of them.
Let’s talk about Dual Inverter Compressor first. The product comes with an advanced Dual Inverter Compressor that can automatically adjust the speed of the compressor depending on the heat load. As a result, it cools the room much faster, make less noise and helps keep electricity bills low by preventing energy wastage.
One thing to note here is that the company gives a 10-year warranty on the compressor. From this, you can get a clear idea about the build quality of this product.
The next feature we will talk about is the 100% copper condenser coil that comes with Ocean Black Protection technology. Firstly, because of the copper condenser, the product can provide better cooling performance. Secondly, copper is less prone to corrosion, so it lasts longer.
Air pollution is a significant problem in India, especially in metropolitan cities. As it harms our health, it also has a detrimental effect on the air conditioner. LG brings Ocean Black Protection to protect the product from the harmful effects of air pollution. This feature protects both indoor and outdoor units from sand, salt, industrial smoke & pollutants. As a result, the lifespan of the product is significantly increased.
Another notable feature of this product is the HD Filter. LG has added HD filters to this AC to protect you from the harmful effects of air pollution. This technology purifies the indoor air by removing various toxic substances like bacteria, viruses, pollen, dust.
AC is a tool that can quickly increase your electricity bill. But fortunately, with this AC you don’t have to worry about that. Active Energy Control is a unique feature of this product, which limits power consumption from 40% to 80% compared to regular use. And it can save up to 57% of electricity.
Also, you know BEE gives an appropriate star rating to an AC depending on its power-saving capacity considering various parameters. This product comes with a 5-Star Energy Rating which assures you about the high energy efficiency of this product.
Stabilizer Free Operation is another convenient feature of this product. Voltage fluctuation is a common problem in many parts of India, which has a detrimental effect on your AC. But with this AC you don’t have to worry about that. Stabilizer Free Operation can withstand enough voltage fluctuations. So you do not have to install the voltage stabilizer separately.
2. Daikin 1.5 Ton 4 Star Inverter Split AC
Daikin is a Japanese air conditioning manufacturer known for making the best quality air conditioners worldwide. Daikin 1.5 Ton 4 Star Inverter Split AC comes with several advanced features and a reasonable price which undoubtedly makes the product one of the best air conditioners in India. Let us briefly talk about the unique features of this product.
The most notable feature of the product is its Neo Swing Compressor. First of all, the compressor provides excellent cooling performance. At the same time, it operates in smooth rotation resulting in much less mechanical friction and vibration. Therefore, the product makes much less noise, reduces energy dissipation and saves electricity.
Another essential feature of the product is Econo Mode. AC is one of the electrical appliances that consume the most electricity. It can significantly increase your monthly electricity bill. But the Econo Mode present in this AC can dramatically reduce your monthly electricity bill by limiting the maximum power consumption.
You also know that BEE gives an appropriate star rating to electrical equipment depending on its energy-saving capacity. This product comes with a 4-Star Energy Rating which further assures you about its power-saving capability.
The condenser coil is essential for the performance of an air conditioner. Copper is best for condenser coils because it has good heat transfer property. It is also less prone to corrosion, so the risk of damage is less. This AC comes with a Copper Condenser Coil. Therefore, it provides better cooling functionality, requires less maintenance and lasts longer.
A convenient feature of this AC is the Coanda Airflow. This unique feature ensures that powerful air drafts do not fall directly on your head. Instead, it goes up to the ceiling and spreads evenly to every corner of the room, so you get the best air conditioning experience.
Power Chill Operation is another convenient feature of this AC. When you feel exhausted in the scorching heat, you want your room to cool down very quickly. This is when the power chill operation comes in handy. It quickly lowers the room temperature at the touch of a button and gives you instant cooling.
Stabilizer Inside Operation is a significant advantage of this product. As you know, voltage fluctuations are harmful to any electrical equipment. AC is no exception. Daikin has added an inbuilt voltage stabilizer to this AC to protect it from damage caused by voltage fluctuations. So you do not have to install voltage stabilizer separately.
3. Carrier 1.5 Ton 5 Star Inverter Split AC
Carrier is a renowned AC manufacturer with an international reputation. Indian customers prefer Carrier brand air conditioners because of its advanced technology, high efficiency, reasonable price and satisfactory after-sales service.
Carrier 1.5 Ton 5 Star Inverter Split AC comes with modern technology, superior build quality, excellent performance and high power saving capability. These make this product worthy of being included in the list of best air conditioners in India. Let’s take a look at some of the notable features of this product.
The most important feature of the product is its FlxiCool Hybridjet Inverter technology. This unique technology enables you to run the AC in four different modes, such as free-running, 100%, 75% and 50%. These convenient modes help you optimize the power consumption of the AC depending on your personal cooling needs and weather conditions. It prevents unnecessary wastage of energy and helps to keep electricity bills low.
Besides, the product comes with a 5-Star Energy Rating that assures you of its high energy efficiency. So there is no reason for you to panic about the extra electricity bill with this AC.
Now let’s talk about the High Ambient Working of this AC. You know, from May to July, the temperature rises drastically in different parts of India. During this time the temperature sometimes rises upto 48℃. A typical AC fails in this situation to provide adequate cooling performance. But Carrier has specially designed this AC to deal with the situation. So even if the outside temperature rises to 52 ℃, it maintains adequate cooling inside the room.
In the summer, when the demand for electricity increases a lot, we face the problem of voltage fluctuations. This can severely damage your AC. But this product comes with an Inbuilt Voltage Stabilizer that can withstand high voltage fluctuations between 150V and 280V. So there is no reason for you to worry about voltage fluctuations with this AC.
Also, the compressor of regular AC fails to run with low voltage. So you are forced to install a voltage stabilizer separately. But this AC continues to provide efficient cooling performance at a low voltage of 195V. Therefore, there is no need for a separate voltage stabilizer.
Further, some useful features like Auto Restart, Timer Function, Child Lock, Self Diagnosis, Sleep Mode, Refrigerant Leakage Detector make this AC more convenient.
4. Voltas 1.5 Ton 5 Star Inverter Split AC
Voltas is an Indian brand that specializes in AC and cooling technology. The brand is renowned for providing high-quality air conditioners at reasonable prices to suit the needs of Indian customers. Voltas 1.5 Ton 5 Star Inverter Split AC is undoubtedly one of the best air conditioners in India with multiple modern features and attractive price. Now let’s see what essential features this AC provides us.
First of all, let’s talk about the unique Adjustable Inverter technology of this AC. The advantage of this technology is that its Unique Adjustable Mode enables the AC to operate at different tonnage as required. Because of this feature, the AC can run at 1.5 tons or 1-ton capacity, depending on outside temperature and number of people inside the room. Not only does it provide you with adequate comfort in a variety of changing situations, but it also helps keep your monthly electricity bill low by preventing wastage of energy.
Now let’s talk about the High Ambient Cooling of this AC. As you know, temperatures in different parts of India sometimes reach close to 50 ℃ on a hot summer afternoon. In such cases, most of the AC fails to cool the house properly. But considering this situation, this AC has been specially optimized. So it can give you the best cooling experience even at an ambient temperature of 52 ℃.
One of the convenient features of this AC is Turbo Cooling. When you return home exhausted in the scorching heat, you want your room to cool down as soon as possible. Turbo Cooling comes in handy at such times. This feature gives you instant comfort by cooling the room in a short time.
A notable feature of the product is the advanced Multi-Stage Filtration. This feature removes various harmful particles, allergens and odours from the indoor air. Besides, CO2 Reduction Technology effectively reduces the amount of carbon dioxide gas that accumulates in a closed room. So you always get fresh, pure, cold air.
Stabilizer Free Operation is another significant advantage of this product. You know voltage fluctuation is detrimental to AC. So you are forced to use a separate voltage stabilizer to protect your AC from this problem. But the inbuilt voltage stabilizer of this AC protects it from high voltage fluctuations between 100 V – 290 V. Therefore, with this product you do not have to use voltage stabilizer separately.
5. LG 1.5 Ton 3 Star Inverter Split AC
Currently, LG is one of the leading brands in the Indian AC market. So we see that LG comes multiple times in the list of best air conditioners in India with different models. This 1.5 Ton 3 Star Inverter Split AC is an excellent product from LG, which comes with advanced technology and superior performance. Let’s look at some exciting features of this AC.
Let’s start with the Dual Inverter Compressor of this AC. The compressor is the most crucial component of an AC. The performance of the air conditioner depends mostly on its compressor. The product comes with a Dual Inverter Compressor. Due to the inverter technology, it can adjust the speed of the compressor depending on the cooling demand. As a result, it can provide faster cooling, makes less noise and helps reduce power consumption.
In hot summer, when you return home being exhausted in extreme heat, you need to cool down the room as quickly possible. In that time Himalaya Cool Technology of this AC comes in handy. You will get instant cooling at the touch of a button.
Another essential feature of this product is Active Energy Control. It limits electric consumption by 40% to 80% compared to normal usage and saves up to 57% power. That will help keep your monthly electricity bill much lower.
Also, with this AC, you no longer have to worry about air pollution. The AC comes with HD filter that efficiently removes various harmful particles such as bacteria, pollen and dust mites from the room. Therefore, with this AC, you always get cold and fresh air.
Stabilizer Free Operation is a convenient feature of this AC. In different parts of India, we face the problem of voltage fluctuations regularly, which can cause severe damage to the AC. LG has added an inbuilt voltage stabilizer to this AC to protect it from this problem. It can withstand voltage fluctuations from 145V to 290V. So you do not have to install a voltage stabilizer separately.
Another advantage of this AC is its Ocean Black Protection, which is specially designed for Indian weather. It protects both indoor and outdoor units from sand, salt, industrial smoke and pollutants. As a result, the AC is not easily damaged due to pollution and lasts for a long time.
In addition, the 3-Star Energy Rating is another significant advantage of this AC. You know that an AC has to pass specific parameters before it can get a star rating. 3-star energy rating assures you about the power saving efficiency of this AC.
6. Hitachi 1.5 Ton 5 Star Inverter Split AC
Hitachi is a premier air conditioning brand in India, which doesn’t need an introduction. Indian consumers love Hitachi air conditioners for its advanced technology, high efficiency and long-lasting, seamless service. Hitachi 1.5 ton 5-star inverter split AC is one of the best air conditioners in India, that comes with several advanced features. Let’s look at them one by one.
The product comes with a variable speed compressor, which can adjust the speed depending on the heat load inside the room. As a result, this AC prevents energy wastage, helps to keep electricity bills low, cools down room very quickly, and minimizes noise.
If you live in a place where the temperature rises very high during the summer, then this AC is perfect for you. With Tropical Inverter Technology, this AC gives you the excellent cooling experience, even at 52°C temperature.
This AC comes with a copper condenser coil. Copper has better heat transfer property, and it is less prone to corrosion. Hence, this AC is capable of delivering better cooling performance and requires less maintenance.
Lastly, Looking at the product title, you must have understood that this is a 5-star rating AC. So you can be sure about the energy efficiency of this product.
Working principle of air conditioner
You know the air conditioner machine cools the room but have you ever wondered how it works?
Did you know that a refrigerator and an AC work primarily the same way? The only difference is that a refrigerator functions in a small space where the air conditioner maintains a comfortable temperature in your room.
Since this is not a technical article, we will not go too deep into science and try to understand it lightly. The AC machine uses a chemical that converts from gas to liquid and liquid to gas continuously, and absorbs heat from the room and releases it into the outside air.
An AC unit has three main components. These are compressor, condenser and evaporator. Usually, the evaporator is located in the indoor unit. The compressor and the condenser are situated in the outdoor unit.
At first the cooling gas or refrigerant arrives at the compressor as a low-pressure gas. The compressor’s job is to put a lot of pressure on this gas. At high pressure in the compressor, this gas becomes a high-pressure liquid and its temperature rises.
The refrigerant then exits the compressor as a high-pressure hot liquid and goes into the condenser.
When passing through the condenser coil, the hot refrigerant fluid releases heat into the outside air. The fan connected to the outdoor unit helps to do this more efficiently. Then the expansion valve lowers the pressure of this fluid. As a result, now the refrigerant turns into a low-pressure cold liquid.
This low-pressure cold refrigerant then passes through the evaporator coil located within the indoor unit. When it passes through the evaporator coil, it absorbs heat from the air inside the room.
After absorbing heat from the air inside the room, this refrigerant again returns to the compressor. And this whole process is repeated.
This whole process repeats continuously in a cycle until the room temperature reaches a specific desired temperature.
When the thermostat detects that the room temperature has reached the desired temperature, it stops the whole operation. When the air inside the room is heated again, the thermostat restarts the procedure, and the entire process continues.
What is the tonnage an AC?
When you have browsed our list of best air conditioners in India, you have noticed that AC capacities are expressed with tonnage such as 1 ton, 1.5 ton, 2 ton, etc. You know, it can’t be the weight of an AC. So what is it?
Electricity usage of an Air Conditioner
The first question that comes to everyone’s mind before buying an Air Conditioner is how much electricity does an AC consume.
In fact, it cannot be answered in one word. Because it depends on many things such as tonnage, star rating, type of use, how long you are using the AC, and so on. Let’s look at some of the key points here that will help us find the answer.
Tonnage of AC
The higher the tonnage of AC, the higher its power consumption. For example, an AC with 1-ton capacity consumes half the electricity compared to an AC with 2-ton capacity.
So you should select the capacity of an AC according to the size of your room.
If you select an AC of less capacity than you need, your room will not be cold enough. On the other hand, if you choose a large AC unnecessarily, your electricity bill will be higher.
Below we have discussed in detail about what the AC capacities should look like according to the room size. Please read that carefully.
Star rating indicates the energy efficiency of an AC. The Bureau of Energy Efficiency, Government of India, gives a product an appropriate star rating based on many factors.
Star ratings range from 1 to 5. In this case, the higher the number of stars, the higher the energy efficiency of the product. For example, a 5 star AC is much more energy-efficient than a 2 star AC. So if you are worried about the electricity bill, then you should select a 5 star AC.
Type of use
Your room must be airtight for an AC to function properly. If the room is not entirely airtight or if you open the door repeatedly, then the power consumption will be high, and your electricity bill will unnecessarily increase.
The weather varies in different parts of India. For example, in Delhi or Ahmedabad on a summer day, the temperature rises very high, and the humidity remains very low.
On the other hand, in Mumbai or Kolkata, the temperature does not rise much, but the humidity remains very high. So even if the temperature is not high, there is a feeling of discomfort for the humidity.
In both cases, your AC will work differently. In the first case, the job of AC would be to cool down the room. Whereas in the second case, the primary function of AC will be to reduce the humidity of the room.
In the first case, the compressor has to do more work. So the power consumption will be higher in comparison.
You may be surprised to hear this, but the colour of your room indeed makes a slight impact on the performance of AC. That is because darker colours absorb more heat, so it takes longer to cool down. On the contrary, light colours absorb less heat and cool faster.
So in case of light colour, the AC can cool down the room quickly, which can also reduce the power consumption.
Number of people
We know that the human body emits heat. The more people you have in the room, the more heat will be emitted.
For example, if there are 2 to 3 people in a 150 sq ft room, then a 1.5 ton AC is enough. But if there is a coaching class in the same place where there are 10 to 12 students, then a 2 ton AC will be needed to cool the room properly.
Best air conditioners in India 2020 – Buying Guide And Tips
Because of global warming, temperature is increasing every year. And with this, the demand for air conditioners has increased significantly. In the last five years, the demand for AC machine has increased tremendously in India, and the survey says that in India the demand will be highest in the next five years.
With the increasing demand for AC machines, new companies and new technologies are coming every year. Competition among the best air conditioner brands is on the rise. So, as a buyer, you should have some basic ideas about various features of an air conditioner before making a purchase.
In this buying guide, we will try to give you all the information you need. So that you can buy the best air conditioners in India for your home, let us discuss them one by one.
Split AC Vs Window AC
There are mainly two types of air conditioners available for use at home — split AC and Window AC. Let’s look at their advantages and disadvantages.
As the name suggests, a split AC consists of two units. One is the outer unit that is mounted on the outside wall. And the other is the indoor unit, which is mounted inside the room. An electric cable and copper pipes connect these two units.
The outer unit consists of compressor and condenser on the other side indoor unit contains evaporator and blower.
At first refrigerant or cooling gas arrives at the compressor as a low-pressure cold gas, a compressor puts a lot of pressure on it. And the cooling gas comes out from the compressor as high pressure and high-temperature liquid and goes into the condenser. While passing through the condenser coil, cooling gas releases heat to the outside air. And it turns into a low-pressure cold gas.
After that, this cold gas is passed through the indoor unit’s evaporator. While passing through the evaporator, the blower circulates the air of the room through it. As a result, the air in the room cools down, and we feel cold.
A split AC is technically way more advanced as compared to a window AC. Split AC is much more energy-efficient and versatile. In terms of performance, a split AC is a lot more powerful than a window AC.
Recently, the top AC companies are focusing more on split ACs. More advanced technology is being regularly integrated into Split AC.
A window AC consists of only one unit. In the case of window AC, the compressor and the blower reside within a single unit. The window AC is placed in a window frame. The blower’s side is toward the room, and the other side is in the open air outside.
You need to remember that window AC consumes much more electricity than split AC. So, even though you pay a lower price during the initial purchase, you have to incur much higher electricity costs consistently.
Also, in the case of window AC, Innovation is minimal, so control options are also limited.
Moreover, a window AC makes much more noise, and it is difficult to install.
As we discussed, a split AC is much more effective and energy-efficient than a window AC. So when you are choosing an AC for your home, you should select a split AC from the above list of best air conditioners in India.
Recommended Reading: Split AC vs Window AC – Which one should you buy?
AC size and capacity
Choosing the right size is very important when buying an AC. An over-sized AC will cool down the room very quickly. But in that case, the power consumption will be unnecessarily much higher.
On the other hand, if you select a size that is less than what is needed, the room will not cool down properly. There will be extra pressure on the compressor. Power consumption will also be much higher.
You need to select AC capacity depending on your room size. Now let’s see what the AC capacity should look like depending on the room size.
|Room size||AC capacity|
|Upto 80 Sq Ft.||0.75 ton.|
|80 to 120 Sq Ft.||1 ton.|
|120 to 180 Sq Ft.||1.5 ton.|
|180 to 300 Sq Ft.||2 ton.|
Also, there are some other things to keep in mind when selecting AC capacities. Let’s discuss them.
Place of living
Where you live that matters. The temperature varies according to the location. When the temperature in Delhi rises to 45° C during the hot summer, the temperature in Kolkata is around 37° C at the same time.
If you live in a place where the temperature rises too high in the summer, then you should select a high capacity AC.
Location of the room
Location of the room is also significant. If your room is located on the top floor or if there is direct sunlight on the roof, then the room will be much hotter.
Similarly, if direct sunlight is applied to any wall of a room, the room will be much hot. In this case, you should select a high capacity AC.
Inverter AC Vs Non-Inverter AC
You must have heard about the Inverter AC again and again. What is an Inverter AC? Many people think that Inverter AC may run on home inverter during a power cut. That is not the case at all. Home inverter or power cut has nothing to do with inverter AC. An inverter AC unit operates based on inverter technology, so they are called inverter AC. This type of air conditioner helps to save a lot of electricity.
Let us now discuss what inverter technology is, how it works, where it is different from regular AC, and what its benefits are.
In the case of a traditional non-inverter air conditioner, the compressor starts to run at full speed when the switch is turned on. The compressor continues at full speed until the temperature of the room reaches a specific desired temperature. The compressor shuts off when the room temperature reaches the desired temperature. When the room temperature rises again, the compressor starts again at full speed.
There are two options for an ordinary air conditioner. Either the compressor will be running at full speed or entirely off. As long as the AC is running, the compressor also goes “On” and “Off” again and again.
The moment the compressor is turned on, it consumes the maximum level of electricity. Therefore, because of frequent “On” and “Off”, a conventional compressor consumes much more power.
In the case of the inverter AC the compressor never shuts off, it is always running. Now you may be wondering if the compressor is continually running, electricity consumption will be much higher, right?
But it is the opposite. In this case, the power consumption will be much less. Let’s try to understand the matter. When you turn on the inverter AC, the compressor continues at full speed until the room temperature reaches the desired temperature.
But even after reaching the desired temperature, the compressor does not shut down, it operates at very low speeds and retains the desired temperature of the room. Unlike an ordinary air conditioner, the compressor does not turn “On” and “Off” repeatedly.
As we have already discussed, the moment the compressor turns on, it consumes the maximum level of electricity. In this case, since the compressor does not turn “On” and “Off” repeatedly, the consumption of power is much lower as compared to ordinary air conditioners.
It’s like driving a car. You never turn on and off the engine frequently. When you need more speed, you press the accelerator. Again when you need to go slow, you release the accelerator.
Therefore, you spend the fuel according to your needs. If you had to turn the engine “On” and “Off” repeatedly, the fuel consumption would have been much higher.
So the difference between an inverter AC with a regular AC is that the first one can automatically adjust the compressor speed as per requirements. So, in this case, the wastage of power is very less. But the second one cannot modify the motor speed. Therefore, the power consumption is much higher. Hopefully, the concept is now clear to you.
Considering all the benefits of an inverter AC, we suggest you select a model with inverter compressor from the above list of best air conditioners in India.
Recommended Reading: What is Inverter AC?
Copper Coil vs Aluminium Coil
As we have already discussed, the working principle of an AC is mainly based on three types of technologies such as compression, condensation, and evaporation. The most crucial element for these three types of work is refrigerant. It is a chemical that continually converted from gas to liquid and from liquid to gas. By changing state, the refrigerant absorbs heat from the room and releases it into the outside air and cools the air inside the room.
The entire process of heat transfer mentioned above occurs within the coil. Therefore, the coil plays a vital role in an AC unit.
Usually, there are two types of coils in an AC unit. They are condenser coil and evaporator coil. These coils are generally made of copper or aluminium. Now the question is which one is better copper or aluminium. Let’s compare them based on some factors.
Transfer of heat
We know the job of the coil is to transfer heat. Copper has better heat transfer property than aluminium. Therefore, when it comes to transferring heat, copper performs better than aluminium.
As a metal, copper is more durable than aluminium. The lifespan of copper coils is much higher than aluminium coils.
When the aluminium coil gets damaged, there is usually no way to repair it. In this case, you need to replace the coil. But if the copper coil gets damaged, you can generally repair and reuse it.
Corrosion is a common issue, which can always occur after a long time. It affects the coil’s heat transfer mechanism and reduces the heat transfer efficiency of the coil.
Also, if corrosion occurs, the coil is likely to leak, which creates a significant performance issue.
Due to the chemical nature, copper is less prone to corrosion. So the lifespan of the copper coil is longer.
You should take care of both copper or aluminium coils so that corrosion does not occur.
Star rating indicates the energy efficiency of an AC. Therefore, the Star rating is an essential factor to consider.
An air conditioner contributes a large portion of your home electricity bill. Therefore, when buying an AC, you need to consider the energy star rating.
An AC with 5 star saves more energy than a 3-star rating AC. But this does not mean you should only buy 5 star AC. You should keep in mind that the price of a 5 star AC will be much higher than a 3 star AC.
According to us, you should buy 5 star AC only if you intend to use the AC more than 8 hours a day.
But if you use AC for less than 8 hours, then a 3 star AC is ideal for you. Because in that case paying more money for a 5 star AC is not justified.