AC Star rating Calculation

The energy efficiency of an AC depends on two factors: Cooling capacity (in BTU) and Power consumption (in Watts)

The cooling capacity of one ton AC should be 12000 BTU, 1.5 ton AC 18000 BTU. Some companies rate their air conditioners as 1 ton but actually their cooling capacity is less than 12000 BTU. SO the BEE has brought into force star rating system so that the manufacturers cannot misguide the consumers

What to check befor buying air conditioner

While buying air conditioner check the following on the specifications: Cooling capacity in BTU, power consumed in Watts and star rating if available.

Star rating is based upon the EER of an AC. EER is cooling capacity divided by power consumed. To calculate EER in watts BTU needs to be converted into watts. 12000 BTU is equal to 3517 watts or 1BTU = 0.2937 Watts or one ton = 3517 watts

While it is important to choose an AC with higher star rating, it is equally important not to compromise on the cooling capacity, which is the primary function of an AC.

BEE air conditioner Star Ratings

The star rating parameters EER shall be obtained from following tables depending on the year of manufacturing/import/assembling of an air conditioner

Air conditioner Manufactured / Imported / Assembled From 07 January 2010 to 31 December 2011

Star Rating	Min	Max
1 Star *	2.30	2.49
2 Star **	2.50	2.69
3 Star ***	2.70	2.89
4 Star ****	2.90	3.09
5 Star *****	3.10	5

Air conditioner Manufactured / Imported / Assembled From 01 January 2012 to 31 December 2013

Star Rating	Min	Max
1 Star *	2.50	2.69
2 Star **	2.70	2.89
3 Star ***	2.90	3.09
4 Star ****	3.10	3.29
5 Star *****	3.30

Air conditioner Manufactured / Imported / Assembled From From 01 January 2014 to 31 December 2015

Star Rating	Min	Max
1 Star *	2.70	2.89
2 Star **	2.90	3.09
3 Star ***	3.10	3.29
4 Star ****	3.30	3.49
5 Star *****	3.50