Have you ever visited a mall or online store, looking for a large home appliance, and notice a BEE star rating sticker on it? Well, many consumers don’t even understand how vital this BEE star rating is, especially for heavy home appliances like AC, Refrigerators, Water Heater, etc. In this post, we will learn what BEE is, what is the purpose, and how to calculate it.
The principal is very simple
Buy a better star rated AC and save high amount of money every year.
Overview of Content [hide]
- Understanding What is BEE?
- Meaning and Objective of BEE Star Rating
- How are the BEE Stars Calculated?
- Comparison of Different AC’s Star Ratings
Understanding What is BEE?
The BEE stands for Bureau of Energy Efficiency. It is an agency under the Ministry of Power (Government of India) which is created in March 2002. The primary purpose of this agency is the conservation of energy by raising awareness about “the effective use of electricity” in the general public.
Meaning and Objective of BEE Star Rating
BEE has been rolling star rating for all the AC brands since 2006. Not only air conditioners, but the government has also made it mandatory for several large appliances brands to mention their BEE star rating for their product since Jan 2010. The main purpose is to spread awareness among consumers to understand energy consumption better.
The prime objective of this star rating is to reduce the energy consumption within the country. The customer must get all the necessary information about the energy efficiency of the particular product they are buying. In this way, the manufacturers are also competing for producing better energy-efficient products.
How are the BEE Stars Calculated?
Before we understand how to calculate BEE star rating, first we must understand the EER, ISEER value and difference between them.
1. EER Value
The heat removed by the AC will depend upon the temperature of the room. Therefore, it is calculated at a particular temperature and humidity. Generally, the outdoor temperature is set to 35°C and the indoor temperature will be set to 27°C with 50% of the humidity value for calculation purposes.
2. ISEER Value
3. Difference Between ISEER and EER
So we can say that all the non-inverter (fix speed) ACs will have EER value whereas the inverter ACs will have ISEER Value. Now, these values lead us to the BEE Star ratings. Take a look at the example below.
Example of EER Value and Star Rating of a 1.5 Ton Non-Inverter Split AC
From this image, we can easily understand that if a 1.5 tonnage capacity non-inverter split AC has 3.3 EER value, that means it will have a 4 Star rating in the year 2019 – 2020. Also, it will consume approximately 1576 of Watts of electricity per year (if you maintain your AC properly) and will save around 2400 per year.
Note: These results are calculated assuming 8 hours of AC operation per day for 5 months in a year, and you pay rs.4 per unit of electricity usage.
We already have discussed above the direct relation of BEE star rating with ISEER value. So, higher EER or ISEER value means more BEE star rating, and it directly refers to more electricity savings with less electricity bill.
Comparison of Different AC’s Star Ratings
It is not fair to compare a 4-star window AC with a 4-star split AC simply because of the difference between their EER values. As we already know that EER value means the efficiency of an electric appliance. After all, a 4-star window AC is less efficient than a 4-star split AC that is why the split AC will save more power.
As you can see in the image, these ISEER values will probably change every year. As the AC manufacturers keep on making better efficient products, these ISEER values will change over time.
From this scenario, we have learned that in order to compare two different kinds of AC, we should check for their EER or ISEER value, not star rating.
Here is the recent star rating of an inverter type AC in India for 2020.