How Much Electricity Does AC Use?

The EER rating of an air conditioner determines how much electricity does a AC use. AC with five stars uses less energy than one with three stars. A three-star air conditioner (1.5 ton) uses around 1.6 units of power per hour, while a five-star air conditioner (1.5 ton) uses about 1.5 units per hour.

How Much Unit of Electricity Consumed by AC Per Day?

A few crucial factors to take into account while determining how much unit of electricity consumed by AC, are listed below:

• The AC's KW rating 

• Total hours of operation for the AC each day

• The overall cost of one electricity board unit (let's use Rs. 6 as the electricity cost per unit)

The following formula is used to get AC power consumption:

Units per month = kW of AC * Daily running hours * 30 or 31 (month)

For instance, a 1.5 kW air conditioner runs for eight hours every day.

Thus, the AC's monthly power usage will be 1.5 * 8 * 30 = 360 units.

Next, assuming that the cost of electricity is Rs. 6 per unit, we can calculate the monthly electricity bill by AC. Therefore, the monthly electricity bill will be

Monthly electricity bill for air conditioning= Units per month * Cost of one unit

= 360 * Rs 6. 

= Rs. 2160

I hope this helps!

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The usage of an AC will vary based on the size of your air conditioner. However, usually a window AC uses 900 to 1440 watts per hour, while a portable AC will consume between 2900 to 4100. Earlier, we had a window AC which used around 1200 watts/ hour. Recently, we switched to a 1.5 kW inverter AC, which consumes 60 units of power/ hour. Let me explain to you how much electric does a air conditioner use in more detail.

How Much Electricity Does a AC Unit Use?

To determine how much energy your AC uses, you can check your energy bill, which includes the information about the AC consumption. However, there is also a formula I have learnt from my brother to calculate the monthly energy usage of a specific AC.

kWh consumed per month = kWh consumed by the AC per hour × Daily running hours × Number of days in the month.

We have a 1.5 kW AC and let’s assume we run it for 10 hours a day. The monthly energy consumption will be: 1.5 kW/hour × 10 hours/day × 30 days = 450 kWh.

Factors Affecting the AC Power Consumption

There are numerous factors that will determine the overall power consumption of your AC. Here are some common factors that will help you understand it in detail.

• Number of people: A room with 20-25 people will require multiple ACs, thereby increasing the usage, while a room with 2-5 people will need a single AC.

• Size of the room: A larger room will need more electricity consumption by AC while a smaller room will consume less electricity to cool down. 

• Temperature: If it's sunny weather, and the temperature is exceeding 35 degrees outside, then the AC temperature will decrease, which can affect the overall usage. 

I hope this gives you some idea about electricity used by AC. 

The electricity consumption of the AC totally depends on your daily uses. If you use it all day, it's going to cost a little extra on a light bill. I used to keep my AC on the whole day. But when I realised that it was affecting the electricity bill, I reduced its use. Central air conditioning is used in houses, and these are the major AC equipment in terms of size and electricity usage. A central air conditioner uses your property's ductwork to distribute airflow across the home without the need for separate air conditioners. So we must know how much electricity does AC use.

How much electricity does an AC use?

To gain a rapid understanding of your AC's power consumption.

See the table below for the power consumption per hour for each tonnage AC.

1000 watts or 1 unit of power equals 1 ton AC

1500 watts or 1.5 units of power = 1.5 ton AC

2000 watts or 2 units of power = 2 ton AC

You may indeed estimate power consumption using the star-rated Energy Consumption Label on your air conditioner.

For energy consumption, use this formula.

EER = Cooling Capacity / Power Consumption

It has an ISEER rating of 2.92, which is the Indian equivalent of the EER rating and cooling power of 5050 watts.

2.92 = 5050 / Power

Power = 1.72 kilowatts per hour (1729 watts per hour)

Power = 1.72 units of electricity per hour,

As a result, this Voltas window air conditioner will use 1.72 units of electricity per hour. But, it is only valid if the AC is set to maximum power for the full hour. The maximum power this AC may consume per hour is assessed as 1.72 units.

Factors that affect power consumption:

1) If the temperature outside is high, the load on the AC increases, so does the power consumption.

2) If the room temperature is very low, the AC will consume more electricity to keep it maintained.

3) If there’s a high difference between both the temperatures, it will consume more electricity.

4) The AC capacity should be appropriate for the size of the space. If an air conditioner is too tiny for a space, the compressor will always run at maximum power, wasting more electricity.

Now you should have understood how much electricity does AC use.