Difference Between 3 Star and 5 Star AC

The difference between 3 star and 5 star AC can offer you a lot of insight into the working, efficiency and what to buy. But first, we need to look at what the ‘Star-ratings’ are all about and how they can make a difference in your overall usage. Also, your needs and budgets have much to say about what Air conditioner to select. So, let’s start from the basics. 


The Star rating system was developed by the US Department of Energy –DOE in 1992. The system has been followed by other countries worldwide as well, allowing the users a better understanding of how efficient your Air conditioner is. Simply put, the Star rating is the measurement of energy efficiency and also indicates the cooling capacity of the appliance. So, this way, it is easier to understand that the higher the Star-ratings, the better the cooling performance. The star ratings range from 1-5 Stars, thus making the 5-star Air conditioner an absolute top efficient one. This is also because it consumes 40% less electricity than the 3-star model. Now, let us look closer at the difference between 3-star and 5 star AC. 

The Price

First things first. Money does matter, and no one is willing to spend a bomb just on an Air conditioner and the added electric bills at the end of the month. Here, the 5-star Air conditioners are more expensive than the 3-star ACs. So, in case you are on the lookout for an air conditioner that is not all that expensive and still manages to cool you down, then it is the 3-start ACs for you. Now, when it comes to 3-star vs. 5-star ac, you might wonder why the latter is expensive. Well, to start with, this is mainly because the 5-star AC comprises better technology, engineering, and quality components. Various advanced features like variable fan speeds and inverter compressors are among the striking features one must watch out for. 

The Silent Operation

Noisy Air conditioners are one of the norms we grew up with not long ago. Well, not anymore. With technological advancement, silent operation in Air Conditioners is very much a common factor. So, when it comes to AC 3 stars vs. 5 stars, the latter is a winnerThe main reason is that the 5-star AC comprises better insulation in comparison, implying that they do not need to work too hard to ‘push out’ the cool air across the space. So, it is a no-brainer here; if noise is a major concern for you, then you should opt for the 5-start AC. 

The Power Consumption

Surprisingly, the former consumes more electricity when it comes to 3-star ac vs. 5-star ac. The reason is that these units work harder to keep you cool. Hence they end up with more power consumption and higher electricity bills at the end of the month. On the other hand, the 5-start AC has better EER ratings- which is the Energy Efficiency Ratio. It is an impressive ’10’ in a 5-star AC compared to an 8.5 in a 3-star one. So, you see, between the 3-star vs. 5-star ac power consumption, then it is a 5-star AC for you. 

Cooling and Durability

This is a no-brainer that the cooling capacity of the 5-star AC is far better as compared to that of the 3-star one. The ratings will tell you this, as one can easily estimate the kind of cooling compared to the other AC types. Other factors also determine the cooling capacity of the AC: the room size, and the insulation levels, are among some of the more impactful factors to the overall cooling results.

The Heat Production

The other difference between 3-star and 5-star inverter ac is that the latter produces far less heat in comparison. This is because they use an efficient condenser which is an important part of the appliance as it functions to cool the refrigerant gas down to a desirable temperature and thus, making it ready to be liquefied and then transferred to the evaporator. It is here that it absorbs the heat from the room.
The main working of the 5-star AC is that it uses a thermoelectric device that generates electricity when two different metals are connected with an electrical current running through them. Thus, enough heat is generated to convert the water into vapour and then send it to a pipe coil within the condenser. It is here that it cools off and then turns back into the liquid form.
As for the 3-star AC, a much older version of the technology is used, commonly called the Vapor-Compressor cycle. Here, the compressor is used instead of the thermoelectric devices to create electricity. Hence more electricity is used in the case of the 3-star AC in order to get an equal amount of cooling done.

The Difference Between 5 Star and 3 Star AC

In order to better understand the average cooling capacity and the tonnage, let us take a look at the simple chart that displays the power consumption for the two AC types:


0.75 TON


1.5 TON


3- Star Ratings

542 W

747 W

1104 W

1448 W

5- Star Ratings

450 W

554 W

840 W

1113 W

Difference Between 3 Star and 5 Star AC: The Conclusion

So, there you have it, people; these are some of the facts, features and aspects of the two AC types:

POWER SAVING REQUIREMENTS: If power-saving needs are your main priority, then you must opt for the 5-star AC.

ON A BUDGET: well, if it is the budget that concerns you, then you need to get yourself the 3-star AC, as it is not all that expensive. 

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