What’s BEE Star Ranking in AC? What’s EER and ISEER?

In 2019, growing heatwaves propelled a surge within the gross sales of air conditioners. In April and Might, air conditioners registered a 12 months on 12 months development of a whopping 20%. With more and more energy-efficient expertise and inexpensive cooling options, the air-con market is booming. With the plethora of air conditioners flooding the market, pinpointing the best mannequin is sort of the duty. Nevertheless, by holding some easy parameters in thoughts, customers can get their arms on air conditioners which are cost-efficient but extremely efficient at cooling. 


One such parameter is the BEE, EER and ISEER star rankings. You will need to perceive what the BEE Star Ranking of an AC is, with a view to perceive how a lot vitality it consumes with a view to cool a room. Be it a moveable AC or a cut up AC, it is very important know the energy-efficiency of your specific mannequin with a view to preserve your electrical energy payments in verify. Learn on to know extra concerning the BEE Star Ranking, the EER, and ISEER. 

BEE Star Ranking

The Bureau of Power Effectivity (BEE) is an company based by the Ministry of Energy in 2002. It was based to preserve vitality by producing consciousness among the many public concerning the efficient use of electrical energy. 

Figuring out the BEE star ranking of an equipment is an indicator of how energy-efficient it’s. Marked out of 5, the extra the vitality ranking, the upper the energy-saving capability of the equipment in query. This, in flip, results in a decrease electrical energy invoice on the finish of every month. 

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Since 2006, BEE has been ranking all AC manufacturers and fashions. In actual fact, the federal government has made it obligatory for a number of heavy home equipment to have a BEE ranking since January 2010. The thought is to make sure that customers are totally conscious of the vitality consumption of a specific equipment and its impact on the general energy consumption of the person. 

Subsequently, buying a cut up or a transportable AC with a 5-star BEE ranking will save extra vitality and generate decrease electrical energy payments than one with a 3 or a 4-star BEE ranking. Checking the long-term worth of the equipment consists of factoring its BEE rating, with a view to confirm the cash saved over an extended time frame. 


The EER, or the Power Effectivity Ratio, is used to calculate the BEE ranking of a specific equipment. It’s calculated as follows: 

EER= Quantity of warmth eliminated (from a closed area) in an hour/ Energy consumed in an hour

The ISEER worth is an enchancment over the EER, particularly for the variable Indian climate. With the introduction of inverter ACs, BEE started to be calculated moreover with the ISEER, which stands for Indian Seasonal Power Environment friendly Ratio. It’s calculated as follows: 

ISEER: Cooling Seasonal Whole Load (CSTL)/Cooling Seasonal Power Consumption (CSEC)

What’s distinctive concerning the ISEER worth is that it elements within the altering seasons, which the EER rating doesn’t. Additional, it’s rated for inverter ACs, whereas the EER rating isn’t. On the entire, the ISEER rating is extra correct than the EER rating. 

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When shopping for an AC, be it a transportable AC or a cut up one, it is very important verify the BEE star ranking for a similar.