# How to calculate the energy consumption by air conditioner?

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An air conditioner is one of the most power-consuming electrical appliances in an Indian home. The more the number of ACs installed in your house, the more inflated your electricity bill can be. However, in today’s day and age, brands are increasingly paying heed and producing AC units that are energy efficient. Its power-saving capacity is based on the Indian seasonal energy efficiency ratio (ISEER) star rating provided by the Bureau of Energy Efficiency (BEE) in India.

ISEER is defined as the total quantity of hotness that an AC can extract from a room in a year, divided by cooling seasonal energy consumption (CSEC) or power consumed during this process. This system takes Indian weather conditions into account and calculates how energy efficient your air conditioning unit is when the outside temperature is between 24 to 43 degrees. So if you have just bought a window, split or standing air conditioner at zero down payment, read on to know how to determine its power usage.

Power consumption

The amount of electricity that an air conditioner utilises is dependent on its type. Here is a table detailing the same:

 Star rating Tonnage Split AC Window AC 5 1 ton 0.98 Kw/hr N.A 1.5 ton 1.49 Kw/hr N.A 2 ton 1.73 Kw/hr N.A 3 1 ton 1.09 Kw/hr 1.15 Kw/hr 1.5 ton 1.56 Kw/hr 1.67 Kw/hr 2 ton 1.93 Kw/hr N.A. 2 1 ton 1.15 Kw/hr 1.25 Kw/hr 1.5 ton 1.7 Kw/hr 1.74 Kw/hr 2 ton 2.21 Kw/hr N.A

Calculating the electricity cost of running the AC

In order to compute how much electricity your air conditioner consumes in a month, you will need:

1. Kilowatt rating of the unit detailing the number of watts consumed per hour
2. Number of hours for which the AC is switched on in a day
3. The cost of a unit of electricity in your state