Electric geysers upto a rated capacity of 200 liters are covered under the BEE star labelling scheme. The rating covers both horizontal and vertical stationary water heaters. The Efficiency of an electric geyser is measured on the basis of Standing loss (kWh/24hour/45°C difference). Standing loss is the energy consumption measurement of a filled water heater, after steady state conditions have been reached when connected to electrical supply and when no water is drawn for 24 hours.
The star rating for the electric geysers is given based on the standing losses. The highest rating is given to that geyser which has the lowest standing losses.
Table: Star Rating Plan for Stationary Storage Type Electric Water Heaters
| Rated Capacity (Liters) |
1 Star |
2 Star |
3 Star |
4 Star |
5 Star |
| Capacity (Liters) Standing Losses (kwh/24 hr / 45_C) |
| 6 |
>= 0.792 & >0.634 |
>= 0.634 & >0.554 |
>= 0.554 & >0.475 |
>= 0.475 & >0.396 |
>= 0.396 |
| 10 |
>= 0.990 & >0.792 |
>= 0.792 & >0.693 |
>= 0.693 & >0.594 |
>= 0.594 & >0.495 |
>= 0.495 |
| 15 |
>= 1.138 & >0.910 |
>= 0.910 & >0.797 |
>= 0.797 & >0.683 |
>= 0.683 & >0.569 |
>= 0.569 |
| 25 |
>= 1.386 & >1.109 |
>= 1.109 & >0.970 |
>= 0.970 & >0.832 |
>= 0.832 & >0.693 |
>= 0.693 |
| 35 |
>= 1.584 & >1.267 |
>= 1.267 & >1.109 |
>= 1.109 & >0.950 |
>= 0.950 & >0.792 |
>= 0.792 |
| 50 |
>= 1.832 & >1.466 |
>= 1.466 & >1.282 |
>= 1.282 & >1.099 |
>= 1.099 & >0.916 |
>= 0.916 |
| 70 |
>= 2.079 & >1.663 |
>= 1.663 & >1.455 |
>= 1.455 & >1.274 |
>= 1.274 & >1.040 |
>= 1.040 |
| 100 |
>= 2.376 & >1.901 |
>= 1.901 & >1.663 |
>= 1.663 & >1.426 |
>= 1.426 & >1.188 |
>= 1.188 |
| 140 |
>= 2.673 & >2.138 |
>= 2.138 & >1.871 |
>= 1.871 & >1.604 |
>= 1.604 & >1.337 |
>= 1.337 |
| 200 |
>= 2.970 & >2.376 |
>= 2.376 & >2.079 |
>= 2.079 & >1.782 |
>= 1.782 & >1.485 |
>= 1.485 |
