Inverter AC Vs Normal AC – A Comparison

It’s important to get an idea of how both the inverter AC and a normal AC works, and differ in operation, to be able to choose the better one of the two for your needs. So without further ado, let’s begin.

Inverter AC Vs Normal AC

In the new generation of ACs, the word “Inverter AC” has now picked up some momentum in a last decade. To make an informed decision about whether to buy an inverter AC or not, we first have to understand how exactly the normal AC works and how inverter AC differs in operation.

A normal AC consists of a compressor which is a heart of operation and essentially responsible for major chunk of power consumed by an AC. When the room temperature is higher than the set point, the compressor starts and as soon as it falls below set point, the compressor stops (i.e. it works in on/off mode). The compressor of an inverter AC however does not stop; it just slows down to the speed such that, the room temperature remains constant. The speed of compressor keeps on varying to maintain desired room temperature.

Since a normal AC works on on/off mechanism, there is an associated noise on every compressor start. As the compressor of inverter AC keeps on running continuously, the operation of inverter AC is very quiet compared to that of normal AC. The room temperature keeps on fluctuating due to intermittent operation of compressor in normal AC. While the continuous operation of inverter AC compressor maintains room temperature fairly constant.

Another use of an AC is dehumidification. better dehumidification is achieved by intermittent but full blast operation of normal AC compared to that of inverter AC.

Talking about power consumption, an inverter AC consumes about 20-40% less power. An AC with 1.5 Ton capacity is most commonly used in India. A normal 1.5 ton 5 star BEE rated AC shall consume anywhere between 1100 to 1170 watts of power depending how low the room temperature set point has been given. A 1.5-ton inverter AC on the other hand shall consume around 800 to 830 watts for the same temperature set point.

A normal AC consumes around 275 electrical units a month for 8 hours of operation while inverter AC consumes around 195 electrical units. if the electricity tariff is 5 Rs/unit, this will lead to difference of around 400 Rs/month. Again, this math will change with hours of operation and power cost in a particular are.

A Final Word

To summarise, compressor of inverter AC runs with variable speed while in normal AC, it works in on/off state. The room Temperature of remains fairly uniform in case of inverter AC while in case of normal AC it keeps on fluctuating. Inverter AC is quieter than normal AC. Last but not least, the power consumption of inverter is about 20-40% less as compared to normal AC depending on room temperature set point.

However, comfort and luxury comes at a cost. The cost of inverter ACs is often around 20% higher than the normal AC. So it is up to user’s discretion, which one to opt for. For instance, in a domestic use, a normal AC will be used seasonally for 8-10 hours a day at max leading to saving of nearly 400-600 Rs a month that will recover the additional cost of inverter AC in 5-7 years. While if it is used in any commercial place like a shop or showroom, it will be used for nearly 12-15 hours a day and almost year along at higher commercial electricity rates which reduces breakeven time to 12-15 months.




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