It is 5-star rated, meaning high energy efficiency under the BEE (Bureau of Energy Efficiency) scheme. 

The heater has an Ultra-Diamond Glassline tank that gives around 40% longer lifespan, especially effective in hard water conditions. 

It uses Whirlflow technology, which reduces the mixing of hot and cold water to deliver about 20% more usable hot water for a given heating cycle. 

With thick PUF insulation, it retains heat for about 10% longer, allowing hot water to stay warmer even after the heater is off.

The body is rust-resistant and splash-proof, with a pre-coated metal exterior that protects against corrosion. 

It includes a multi-function valve for safety (likely to handle pressure relief etc.) and a moulded 3-pin plug for better load efficiency. 

It has an ergonomic temperature control knob, plus indicators for power and heating status, so you can monitor and adjust conveniently. 

Warranty support is good: 7 years on the tank, 3 years on the heating element, and 2 years on the overall product against manufacturing defects.

Capacity: The 25 L model is suited for small-to-medium use (e.g. one or two persons, depending on usage). Warm water demand relative to capacity should be considered. 

Water hardness: The Ultra-Diamond Glassline tank helps with hard water conditions, improving durability. 

Pressure compatibility: The product is compatible with high pressure situations — supports up to 8 bar pressure, making it usable even in high-rise buildings or where supply pressure is high. 

Operating voltage & wattage: It works under standard Indian mains (220-240 V) with a wattage of 2000 W for the 15 L version; the 25 L would have similar rating scaled.