Although electricity consumption of water heater or geyser depends on the amount of hot water used, the standing loss can be an important factor while deciding which water heater to buy. “Standing loss” or heat/energy loss of a water heater to the surrounding in 24 hours is an important factor used by BEE (Bureau of Energy Efficiency) to decide on the star rating of a water heater. Using hot water optimally and choosing the right sized heater can minimize “Standing Loss”, but the most efficient water heater for a given size can assist in minimizing losses. Most sources on the Internet provide details on features and reviews. Electricity consumption hardly becomes the deciding factor. To help people make electricity consumption a deciding factor.
If you are looking for a water heater for your bathroom and it will be used mostly for bucket bath or short showers (especially in cities that are not too cold like in North India), or if you are looking for a water heater for the kitchen in a cold city (e.g places in North India), then Racold Pronto Neo 6 Liter is a great choice for you. This BEE 5 star rated water heater has an extremely low standing loss of 0.28 units/24 hours. Because it has a 3000-Watt heating element, the heating of water is quicker than most normal water heaters in the market (please note: higher wattage in water heater does not mean more electricity consumption but faster heating. Electricity consumption depends on the volume of water used). This water heater has thick PUF insulation which provides good heat retention capability. It can withstand high pressure which is a great feature to have if you live in a high-rise building. It has high pressure and temperature cutout for providing safety. It also has an anti-siphon system to prevent dry heating. It comes with a 5-year warranty on the tank, a 2-year comprehensive warranty, and a 2-year warranty on the heating element.
A 10 ltr water heater is good enough for bucket bath in extremely cold cities and shower bath in most other cities. And if you think this is your requirement then V-Guard Sprint 10 is a great choice. This model has an inner tank made of 304-grade stainless steel and the outer body made of rest proof ABS. Stainless steel in the inner tank with ACC protection makes it strong against corrosion. The water heater can stand 3.5 bar pressure which makes it good for a high-rise building as well. It has a high-density PUF insulation which makes it highly energy-efficient (BEE 5-star rating withstanding loss of 0.365 units/24 hours). The heating element is made out of Sacrificial anode which gives it a long life. The heating element is a 3 kW heating element, which makes it really fast in heating water. The model comes with a 5-year warranty on the inner container and a 2-year comprehensive warranty.
A 15 ltr water heater is good enough for a shower bath in all cities in India. And one should not go for a bigger one unless the usage is for a tub or rain shower. For 15 ltr requirement, AO Smith HSE-SDS-015 is a great choice. This BEE 5 star rated water heater has a low standing loss of 0.451 units/24 hours. This water heater has AO Smith’s Blue Diamond Glass Lining for corrosion protection of the tank and the heating element is also glass coated for corrosion protection. The heating element is also made of stainless-steel core to protect it from corrosion. This model also has an external temperature control knob so that you can reduce the heat if you want and save electricity. It also has a multi-function safety wall to release water in case of excess pressure. It comes with a 7-year warranty on the tank, a 2-year comprehensive warranty, and a 4-year extended warranty on the heating element.
If you are looking for a water heater for a tub or rain shower, then this water heater from Usha is a good choice. This BEE 5 star rated model has a standing loss of 0.511 kWh (or units)/24 hours. The heating element in this water heater is a 2000 watt heating element. It has a glass-lined thick inner steel tank which is good for corrosion protection. Even the heating element is a magnesium anode one with glass-lined enamel coating for superior corrosion protection. It can handle 8 bar pressure which makes it good for high rise buildings as well. It has good protection against overpressure as well. The product has 7 years warranty on the tank, 3 years on the heating element, 2 years on the product against manufacturing defects.
If you have a small hot water requirement and you are looking for an instant water heater, then Crompton Solarium DLX 3 Litre model is a good choice. This model has a stainless steel inner tank with Nano Polymer coating to provide good corrosion protection. The heating element is a 3 kW copper heating element that is fast in heating water and is durable. It can handle 6.5 bar pressure which makes it suitable for high rise buildings as well. The ABS body of this water heater is a rustproof body and on the whole, it is a durable model. It comes with thermal cutout and excess pressure protection. The product comes with a 2-year warranty on the product.