Star ratings on air conditioners: What they mean

Buying an Air conditioner that is suitable for your requirements involves a fair bit of research and consideration of a few important factors. But of all factors, one aspect you should absolutely pay attention to is the ‘Star Rating’. It directly impacts your overall experience with the AC, so let’s get to know them a little better so that you can make a smart purchase.

The star rating system is a standard for measuring and rating the energy efficiency of electrical appliances. In India, this rating is awarded by the Bureau of Energy Efficiency (BEE). An AC is given a star rating on a scale of 1-star to 5-stars, where the latter means the best and most efficient it can be. When it comes to ACs, it is decided on two factors.

1. The cooling capacity (cooling output)

2. The energy efficiency rating (power input)

One of the most important things to keep in mind while trying to understand what the star ratings mean is that the standard for awarding these ratings changes every year. The ‘Label’ period is mentioned on each AC or at least on the box of the AC. Each AC has a particular Energy Efficiency Ratio (EER). It is the ratio of the amount of heat removed in an hour to the power consumed in an hour.

ALSO READ: BEE star ratings: What are they and why should you know about them

EER is also sometimes known as ISEER (Indian Seasonal Energy Efficiency Ratio). ISEER is a ratio of the annual amount of heat the AC can remove to the total amount of energy it can consume in a year.