Whirlflow Technology ensures that cold water enters the water heater laterally, where the heating element is located avoiding direct mixing with the already heated water at the top of the tank . This design enhances overall heating efficiency, providing more hot water and saving time with efficient heating. As a result, Whirlflow Technology enables a 20% increase in hot water delivery.

The higher the star rating, the higher be energy efficiency as per the BEE 2023 regulations for storage water heaters. 25% energy savings basis BEE star rating guidelines for standing loss of 5-Star vs 1-Star Water Heater (kWH/24-hour/45 C) 

Instant geysers only supply when you need it, thus you only need to switch on the geyser when you require hot water. As the water supply is instant, the use of electricity is also very less. Hence, it is an energy-efficient choice.

Storage tank water heaters take around 10 minutes, instant water heater takes approximately 3 minutes and immersion rods heats the water in a minute and gas water geysers heats the water instantly as well.

It depends on your requirements. If you need hot water on demand then you should go for instant water heaters, but if you live with a family of 4 then you would want to store hot water for an extended period, then you should buy a storage water geyser.