Now you can hope for lower electricity bills even if you run your air-conditioner the whole night! The Bureau of Energy Efficiency (BEE) has introduced a new star rating methodology for air conditioners, thereby helping you make a more informed choice of the energy efficiency of the AC you are buying. The new methodology called Indian Seasonal Energy Efficiency Ratio (ISEER) is said to be designed keeping in mind the variance in higher temperatures in the country. Keeping the performance of air conditioners during higher temperature in mind, ISEER will address the different climatic zones in India and higher temperature, says a Ministry of Power release.
ISEER measures energy efficiency of air conditioners based on a weighted average of the performance at outside temperatures between 24 and 43 degree C based on Indian weather data. “The weather profile of 54 major cities shows that 65% of the total number of hours in a year have a temperature above 24 deg C (5778 hours out of 8760). Air conditioners in India have hitherto been tested under the IS 1391 at a standard operating conditions of outside temperature of 35 degree C. Star rating is given to manufacturers based on the test results provided by them as tested on the above standard,” the release explains.
The new methodology is expected to bring in higher energy efficiency in appliances and reduce energy consumption. “Ratings based on ISEER have been introduced on a voluntary basis for Variable Speed (Inverter) Air Conditioners since June 2015 and proposed to be merged with fixed speed air conditioners in the mandatory regime from January 2018. Some of the leading manufacturers have already adopted the rating for inverter air conditioners,” the Ministry of Power said. Since 2010, it is mandatory for air conditioners to labelled on the basis of the star rating, and cannot be sold without a star label. Now as per latest notification, from January 2016, Star-2 is the least efficiency level to be sold in the market, hence variation in power consumption is compared between Star-5 (most efficient) and Star-2 (least efficient) air conditioners.