An air conditioner is one of the most technological household appliances that will need proper installation and careful handling. For it to serve correctly, it is worth having an idea of ​​its structure and possible problems during operation. Only in this case, you can provide a healthy indoor microclimate for a long time. As a result, this article will answer the question of what is an inverter air conditioner and how is it different from Non-inverter ac and also give you detailed information on the subject.

What is the meaning of Inverter air conditioner?




Air Conditioner


March 18, 2020

What is the meaning of Inverter AC?

An inverter is a device for converting frequency.

It will draw more power or less power, depending on the thermostat and the incoming air temperature.

The compressor power and speed adjust appropriately depending on the temperature condition.

Inverter ac vary their cooling/heating capacity by adjusting the power supply frequency of their compressors.

How an Inverter AC work?

How an inverter ac work

The principle of operation of an inverter ac is that it can operate both in cooling mode and in heating mode.
When the ambient (outdoor) temperature is high, or there are more people in a room, Inverter AC increases the cooling capacity.
Whereas if the ambient temperature is low or there are fewer people in a room, it reduces the cooling capacity.
An inverter gives more power to the compressor any time it requires more energy. If the accelerator needs less power, it usually limits ability. With the help of such a technology, the compressor will always stay on.
Hence, it will draw more power or less power, depending on the thermostat and the incoming air temperature. The compressor power and speed adjust appropriately depending on the temperature condition.

What is the difference between Inverter and Non-Inverter AC?

What is the difference between inverter and non-inverter ac

1. Power Consumption, Energy Efficiency

Thanks to the variable speed, the inverter unit is more energy-efficient as well as more economical.
Inverter ac sensor can adjust the power according to temperature and does not work at full speed like a non-inverter.

2. Average Lifespan

Due to the smooth transitions from intensive operation to the minimum load mode, and this inverter technology does not allow excessive overheating or overcooling of the compressor, the inverter air conditioner is wear-resistant.
On the other hand, the non-inverter unit turns on and off whenever it reaches a specific temperature, which is considered the limit. Because of this, when the compressor starts and stops to maintain the optimum temperature, the unit operates more intensively. This causes a lot of system wear.
As manufacturers and trading companies promise, the average life of an inverter air conditioner is longer. It is about twice as long as a non-inverter one and is 8-15 years (information differs for different companies).

3. Cooling Speed

An inverter air conditioner can cool a room faster than a non-inverter. Initially, the inverter consumes more energy than the non-inverter, and then the inverter will reduce its power as it approaches the optimal temperature.
Hence, this is the main difference between the two systems, but before you buy one, you also need to consider the size of your room, the number of uses of the air conditioner, and which one fits into your budget.
Due to changes in compressor performance, the inverter air conditioner can quite accurately maintain the stable air temperature.

4. Annual Power Consumption

Air conditioners with a variable speed of the compressor shaft save energy due to the absence of inrush currents and a smooth decrease in performance. No wonder such a technique was invented in Japan and has been widely used in Europe, where the cost of electricity is quite high.

5. Noise Level

Modern compressors have a low noise level. Sometimes by the sound, it is even impossible to determine whether the compressor turned on or not. Especially in this respect, scroll compressors are suitable, and their vibrations are almost invisible. However, the compressor control method does not particularly affect the noise level. At reduced speeds, the compressor becomes quieter by a maximum of ten dB. The only thing is that when the typical air conditioner starts, the short-term vibration and noise appear for several seconds.
The next element that produces sound is fans. Modern air conditioners use low-noise fans with PWM controlled motors (pulse width modulation) or, even better, DC motors. And now the most exciting thing is that in non-inverter air conditioners, as well as in inverter air conditioners, manufacturers are using “silent” DC fans and PWM control. So noise level needs to be looked at in the technical specifications, and not according to the inverter / non-inverter principle.

Which is better when the temperature difference between day and night is vast?

Which is better when the temperature difference between day and night is large?

A cooler equipped with a frequency converter can more accurately withstand a given temperature; this is an indisputable fact. The problem is different: sellers associate this feature with maintaining the health of residents, although in reality, it is a comfortable stay inside the room. However, strict maintenance of air temperature eliminates the sensation of stuffiness and cold at the moments when the standard “split” model is turned off.

The main difference between these climate systems is the principle of operation. As a result, inverter air conditioners are more stable while maintaining the set temperature, as well as more economical. So, inverter models, on average, can provide indoor comfort for an impressive 8-16 years when the temperature difference between day and night is enormous.

Are there Star Ratings for Inverter AC?

The main objective of an inverter star rating is based on reducing the energy consumed. However, it is prudent to understand all the necessary information that is required to measure an inverter ac energy efficiency. Manufacturers are always competing in manufacturing energy-efficient air conditioners.

It is essential to understand the ISEER and EER values before you know how to calculate the star rating for BEE. An EER is the Energy Efficiency Ratio that non-inverter air conditioners use. An air conditioner EER is:

EER = Heat removed per hour/power consumed in an hour.

The room temperature will determine the amount of heat that the air conditioner will produce. Hence, you can calculate the heat that your air conditioner will remove at an outdoor temperature as always 35C and room temperature as 27C.

The ISEER value is for an inverter air conditioner. ISEER means the Indian Seasonal Energy Efficient Ratio.

ISEER = the Cooling Seasonal Energy Consumption and the Cooling Seasonal Total Load.

The ISEER calculation is almost the same as EER. The only difference is that ISEER considers a variable power consumption and seasonal temperature changes that an inverter uses. Since the year 2016, BEE came up with a new way of rating inverter air conditioners. The leading 5 Star rating for the inverter air conditioner in the year 2018 is the BEE model.

Are there Star Ratings for Inverter ac?

How to Calculate the Perfect AC Size?

How to Calculate the Perfect AC Size?

Air conditioners are typically rated using the British thermal unit (BTU) per hour. 12,000 BTU per hour is equivalent to one ton per hour. Tonnage is the most used unit in India.

Two methods are commonly used :

1. Area Method

This area involves multiplying the breath and the length of the room. Then, look for the square-root of the answer. After that, divide the answer by 10. The number that you get will undoubtedly be the tonnage of the air conditioner that is required for that specific room.

2. The Volume Method

An alternative way is to find the product of the breadth, height, and length and then divide the result by 1000. As a result, the answer will be the required tonnage.


Area Method

Many people don’t like mathematics, to make it easier; let us suppose that your room is 20 feet long and 15 feet wide.

step 1

Find the product of 20 × 15 = 300 square feet.

Step 2

Find the square root of 300 square feet that is 17.320508076

Step 3

Divide 17.320508076 /10 to get 1.7320508076

It is as simple as that. You will now be required to choose an AC, which is 1.7 Tonnes. In conclusion, a 300 square feet room will need to have a 1.7-ton air conditioner.

Volume Method :

Assuming that a room is 10 feet long by 20 feet wide and a height of 15 feet.

Step 1

You find the product of the three dimensions.

10×20 x 15 = 3000 cubic feet.

Step 2

Divide the result by 1000

3000)/1000 = 3 ton

As a result, you will be required to buy a 3 T AC.

An air conditioner that has small tonnes will increase your electricity bill since it will run continuously in a big area.

On the other hand, an air conditioner with massive tonnes will consume less power and reduce your electricity bill because it will cool quickly. Still, it will result in a clammy and sticky feeling. This happens because the AC removes moisture from the air. Any time when the air conditioner does not run for a long time, the humidity will not be wholly extracted, hence causing sogginess.

An air conditioner with a higher tonnage is better than the one with a low tonnage.

An old rule states that you should use an air conditioner of 1T for every 400 sqft. Area.

You should buy the best air conditioners as you can afford. A better air conditioner means more energy efficiency.

It is recommended that you buy a 3-star air conditioner if you intend to use it for 8 to 10 Hrs in a day for not less than four months. If you want to use the AC for a period of 5 to 7 months, then go for a 5-star air conditioner. As a result, you’re going to use it for ten months or above, then you should opt for cold and hot Inverter AC.

When do you need to increase the tonnage of your air conditioner?

When do you need to increase the tonnage of your air conditioner?

1、If your house is directly exposed to the sunlight

2、The room houses more people than normal

3、The home is located on the topmost floor.

4、The room location is close to a kitchen.

5、The temperature on the outside is above standard.

Why Inverter Air Conditioner not work?

Why inverter air conditioner not work

In poorly executed or old air conditioners, the refrigerant may leak. As a result, the performance of an inverter air conditioner may decrease, hence, causing freezing of the valve or evaporator.

If air and moisture enter the circuit, the compressor may fail over time, and the capillary will become clogged with ice plugs. Hence, to prevent this from happening, evacuation should be carried out using a special pump during the installation of an air conditioner.

If an inverter air conditioner that is controlled by the remote control has stopped working, first of all, check that the batteries are working correctly. The question of why the inverter air conditioner does not work and what to do may be difficult. In all other cases, when the air conditioner does not work well, you should contact a specialist.

Inverter Air Conditioner Recommendations.

Inverter air conditioner recommendations

1. If the refrigerant in the evaporator does not have time to go into a gaseous state thoroughly, liquid enters the compressor inlet, and it fails. This can happen due to the shortcomings of an inverter air conditioner itself or due to improper operation. However, even if many modern models of air conditioners work for heating, they cannot replace the heating system. They are convenient to use in the off-season during a sudden cold snap when the heating season is already over or has not yet begun.

2. On sunny hot days, hang windows to avoid additional heating of the room. It is necessary to ventilate the room, this is an elementary sanitary norm, but the inverter air conditioner must be turned off.

3. In modern air conditioners, there are always filters on which dust and other small particles settle. As such, you should always wash and replace filters periodically following the operating instructions. If this is not done, the air quality in the room will decrease, and the life of an inverter air conditioner will reduce.

4. You should always set the temperature to which you want to cool the room so that you are comfortable. This is usually a little over twenty degrees Celsius. If it is hot outside, and you set the minimum temperature, it will be a too heavy load for the air conditioner, freezing of the heat exchanger and refrigerant leakage may occur. If desired, you can cool the room faster by increasing the fan speed.

How to choose the right Air Conditioner?

How to choose the right air conditioner?

Below are a few things that you should consider.

1. Room size

Firstly, choose an air conditioner based on the type of room. Window and mobile air conditioners are best suited for installation in the country. This is because they are relatively small in size, portable and do not require installation. However, the most widely use of split systems are in apartments, houses, and offices.

2. Price

Besides, the cost of an air conditioner is an essential factor. As such, it is prudent to consult a specialist to avoid overpaying just for the “name” of the manufacturer. A high-quality, but a less well-known brand, can be in no way inferior to the more expensive famous counterpart.

3. Installation of the Air Conditioner.

Pay attention to the installation of the air conditioner: do not order installation from questionable companies, since the efficiency of the air conditioner often depends on the quality of installation work during its installation.

4. The Temperature of the Living City

It is also imperative to know the temperature of the city where you intend to install the air conditioner. However, different areas will require different types of air conditioners.

5. Electricity

The efficiency of an air conditioner is measured by the power that it consumes in comparison to its output. As a result, it is essential to look for a highly efficient air conditioner.

Recommended Products (The Best Air Conditioner with Inverter in India in 2020)

1. Best 1.5 ton Split Inverter AC – LG KS-Q18YNZA (5 Star)


The main crucial things that we look from an air conditioner is that it should be in a position to cool your house, be energy efficient and durable. The cooling ability of an air conditioner depends on the cooling capacity of an AC. If you have calculated your room’s tonnage using the method explained above, and your requirement is 1.5 ton, then the perfect fit is the (Best 1.5 ton Split Inverter AC – LG KS-Q18YNZA ), and it is rated five stars. The air conditioner has a cooling capacity of approximately 1.46 tons with a 4.73 ISEER and an efficient air conditioner of 1440 watts. The product has a 100% heat exchanger that is made of copper and an Ocean Black Corrosion protection. This AC saves a lot of electricity.

2. Best Budget 1.5 ton Split Inverter AC – Midea SANTIS PRO 3i (MAI18SP3N8F0)


This the air conditioner for those who want to save electricity and, at the same time, have a comfortable environment. As a result, the model is suitable for those whose usage is not very high and would like to buy a model that is not expensive. Midea SANTIS PRO is a 3-star air conditioner that has a capacity of about 1.54 tons, a 3.75 ISEER, and consumes a power of about 1990 watts. It has an Auto Cleaning feature and a refrigerant leakage detector.

3. Most Energy Efficient (Electricity Saving) 1.5-ton Inverter AC – Toshiba RAS-18PKCV2G-IN+RAS-18PACV2G-IN


This the most energy-efficient inverter air conditioner. However, it is a Toshiba product and has a capacity of about 5100 watts, 5.6 ISEER, and a power consumption rate of about 1230 watts. This air conditioner is made of pure copper, uses Dustless coils technology, uses R32 refrigerant, and is self-cleaning.

4. Best 1 ton split Inverter AC – LG KS-Q12YNZA (5 Star)


This is an LG model of 1 ton that you can get at the best price despite its excellent performance. The air conditioner is 1 ton, has a 4.70 ISEER, and regular power consumption of about 938 watts. The inverter air conditioner has a technology that enables it to efficiently vary its tonnage and power consumption based on the room requirements. It is equipped with modern sensors that sense the temperature requirements hence able to adjust power consumption effectively.