A 1-Ton A/C Consumes These Many Units in an Hour | Power Consumption

A/C Consumption

Many people have no idea about the things to look out for when buying their first A/C, and sometimes it can get pretty overwhelming.

You will need to do a lot of research when getting your first A/C, and this question always pops up when buying a new one. This is because air conditioners can increase your monthly bills. Thus, it is vital to consider the capacity of your A/C.

How many units does a 1 ton A/C consume in an hour? When it comes to units, you can expect the power consumption of a 1 ton A/C to be 1 unit of electric power per hour. But if the room is cool, then the power consumption will automatically be reduced because the system will cut off the compressor.

Get a better understanding of the power consumption of an A/C in this article, along with the factors that affect its increase. I will also give you a tip on how to compute your A/C’s power consumption and the easiest way to do so.

Power Consumption of A/C

When buying an air conditioner, there are certain factors you should always consider. One of these is power consumption, as it is the key element that affects the overall process and purchasing element.

You should know that even power consumption will always depend on the capacity of your air conditioner. The higher the capacity of the A/C, the higher its power consumption and vice versa.

Other factors determining the power consumption of an A/C are the A/C model, manufacturer, and star rating.

The Computation of Power Consumption

To calculate the power consumption of a 1-ton air conditioner for over an hour, you have to solve a simple mathematical equation. Let’s assume that in 1 hour, the power consumed is x kWH, where x is a KW rating given to your A/C.

Assume that for a 1 ton air conditioner, the kW rating is nearly 1 kW, depending on the A/C model, manufacturer, star rating, etc.

For a 1 ton air conditioner, the normal rating is around 1.05 kW. The actual power consumption of your A/C will be completely based on the capacity of your A/C.

So, if the room is hot, 1 hour at 1 ton of A/C will draw almost its rated power. But if the room is cool, the power consumption will drastically reduce because the system will cut off the compressor.

You will end up with the power consumption for 1 hour being equal to 1 kWh, which is 1 unit.

Calculating Power Consumption From A/C’s Label

Among the easiest ways to calculate your A/C power consumption is by using the energy-saving label that can be found on your A/C.

From this label, you can see the annual power consumption for your A/C. For this example, you can compare it using a 1 ton split A/C.

As you can see clearly on the label, the annual power consumed by this 1 ton A/C is 589.99 kWh. This value is usually calculated in test conditions, with annual operational hours being 1600.

It can translate to 4.5 hours of operation every day and 133.33 hours of operation every month. It is the average daily operation for most households.

The actual value will most likely be higher than this value because of the high outside temperature compared to testing conditions.

Factors Affecting A/C Power Consumption

There will always be slight differences in your power consumption because it is not exact all the time. Many factors can affect your power consumption.

Here are some of them that you should take into consideration if you are worried about your power consumption:

Number of People in the Room

The number one factor is the number of people inside your living area, as the human body can emit lots of heat. A room with 20 people will need a bigger A/C or multiple A/C’s to cool the air inside it.

On the other hand, the same room with three people will get the same cooling for a smaller-sized A/C or even a single one. This means that if you have more people inside, you will need more power and have a higher electricity bill.

Outside and Inside Temperatures

It is essential to note the outside and inside temperatures, as it takes more power to cool a room while the outside temperature is 40 degrees Celsius as compared to 32 degrees Celsius.

Room Size

Your A/C removes the heat from the air inside your room. For this reason, the larger the room, the larger the volume of air inside it.

This means that there is a need for massive electricity to cool that air and the electricity consumed in removing heat from a 100sqft room is less than the amount required to remove heat from a 200sqft room.

Electrical Appliances in Your Room

Most electric appliances can generate heat, increasing your room’s temperature, and making your A/C do additional work. This means that there is more work involved in cooling the same volume of air—and more power consumption.

Volume of Air to Be Cooled

There are times when open cupboards can increase the air volume to be cooled by your A/C. This means that your A/C will have to cool the hot air inside your cupboard, which is unnecessary and can consume extra power.


Most air conditioners come with energy savings stars and an inverter technology compressor. This means that they do not consume much power.

A 1-ton air conditioner, be it inverter or non-inverter, can consume about 0.5-1 unit of electricity every hour. It will most likely change depending on the operating conditions, which is not much, keeping in mind the comfortable cooling experience of A/C’s, especially during summertime.

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