To educate people about the need to reduce power consumption and help them to make a wise decision, BEE has introduced a system of star rating. Star ratings essentially indicate the degree of efficiency of an appliance. According to these ratings, a 5-star rating would mean the most energy efficient, whereas a 1-star rating would be the least efficient. For some equipment like Air Conditioners, BEE is making star rating mandatory. In future, it may become mandatory that all appliances have a star rating to indicate their efficiency.
People usually don’t change fans for years. As a result, these fans become energy hoggers, adding to the electricity bills. A 20-year-old fan can consume up to 175-200W which is almost equivalent to that of a small sized refrigerator.
When it comes to fans, the star rating is calculated by their service value.
What is service Value?
Service Value of a fan is the sum that we get after dividing the air delivery (in cubic meter/minute) by its power consumption. For example, if a fan gives air delivery of 220 CMM while consuming 50 Watts, its service value will be:
220/50 = 4.4
Any fan with a service value greater than four is given a 5-star rating as per current standards.
Difference between ordinary fans and 5-star fans:
The primary differences in a regular induction based ceiling fan and a normal 5-star fan are listed below:
Power factor: 5-star fans have motors with high power factor. Power factor is the ratio of the actual power that comes through as AC to the real-time power in the circuit. Lower power factor is a result of the use of cheap quality raw materials. So, essentially in a 5 Star fan, the quality of material like copper windings/ grade of the stator is better than a regular 70-80W ceiling fan.
Reduced air gap – In 5-star fans, the air gap between stator and rotor is less as a result of which there is better induction effect. Thus, the heat loss is also minimum.
These features can bring down the power consumption from 75-80 Watts to 50-55 Watts, thus, saving a lot of energy and money.
BEE and EESL have been waging war for the last few years to bring down the power consumption of appliances, and so far the results have been impressive. After a mass initiative by BEE to reduce power consumption by changing old bulbs/ tube lights with energy efficient LED bulbs/ tube lights, the power consumption has apparently reduced by 21,500 MW (equal to Rs 45000 crores). Now, EESL has started mass distribution of Energy Efficient BEE certified 5 Star fans to consumers ( 50-55 watt fans) at a subsidized rate.
Downside to 5 star Fans
Despite the advantages, there is a downside to 5-star rated fans as many fan manufacturers have started compromising on the air delivery and RPM of these fans. To reduce power consumption of fans, they have reduced the optimum speed of the fan, which is not exactly the ideal way to go. Thus, many fans even after being 5-star rated prove to be insufficient for the heat of a tropical country like India.
Other Superior Alternative – BLDC Fans
5-star rated fans are today facing tough competition from their superior counterpart – BLDC fans. These fans operate on brushless DC (BLDC) motors which are highly energy efficient and reliable. A BLDC fan can generate a superior airflow than a 5-star rated fan while consuming 65% less power.
Atomberg Technologies was the first company to introduce this pioneering concept of the BLDC motor in India with its Atomberg range of fans. These fans consume only 28W at maximum speed while delivering a high volume of airflow.
Apart from being super energy efficient, BLDC fans can run up to three times longer on inverter battery and also perform well during voltage fluctuations as their voltage range is quite wide (110V-285V). All Atomberg fans come with a smart remote with advanced features like breeze mode, timer mode, boost mode, and sleep mode to make your cooling experience more convenient and comfortable.
So whenever you go next to purchase a new fan for your place make sure you just don’t ask for a 5 Star fan, but you ask for a BLDC 5 Star fan, preferably a Atomberg!