How to select a Water Heater


Water Heaters are round-the-year products used in the bathroom, kitchen or centrally installed to provide hot water multiple taps. Water Heaters have evolved to become technologically more superior & efficient, and manufacturers have introduced various safety features to prevent any risk of electric shock.
To meet the decor of consumers today, manufacturers are actively marketing beautifully designed Water Heaters / Geysers.

Types of Water Heaters / Geysers

There are 3 types of water heaters in India –

  1. Instant Water Heaters
  2. Storage Water Heaters
  3. LPG / Gas Water Heaters

What kind of Water Heater / Geyser should I buy?

Source of Energy The Source of energy (whether electrical or LPG) will affect how water heater operates, its efficiency, size & cost
Energy Efficiency A higher star rating automatically translates to higher energy efficiency
Cost Before you purchase a water heater, compare its operating costs with other water heaters to see if it would be the right choice for your home
Size While considering size, keep in mind the number of bathrooms in your house, total family members & different applications / usages of the hot water
Capacity Criteria
6-10 Litres 2 Persons per bathroom
15 Litres
1-2 Persons per bathroom in extremely cold climate
15 Litres or more
3-4 Persons per bathroom
25 Litres 3-4 Persons per bathroom in extremely cold climate
35 Litres or more More than 4 people & when you use bathtubs
6-10 Litres Kitchen, mild hot water requirement
Usage Capacity
Kitchen Instant Water Heater upto 15 litres
Bucket Bath
Instant Water Heater / Storage Water Heater upto 35 litres
Overhead Showers
15 to 35 litres storage water heater
Bathtubs 25 litres and above storage water heater
Jacuzzi 50 litres and above storage water heater
As required Instant water heater – Obtain hot water as much as you require


What safety precautions do we need to follow while using a water heater / geyser?

Every water heater requires regular maintenance to ensure optimum safety. Some of the safety precautions are:

  • In case of water heater with an adjustable knob, set the water temperature below 49 degree Celsius
  • Keep the area around the water heater clean & free of combustible & flammable material
  • Never leave children unattended around a water heater
  • Follow the manufacturer’s guidelines for maintenance schedule
  • Sediment build-up can cause premature tank failure, electric element failure, & excess costs on fuel bills. So, make sure to use the drain valve to flush the water heater at least once a year to remove sediment build-up

Bureau of Energy Efficiency (BEE) ratings

The Bureau of Energy Efficiency (BEE) rating of water heater indicates its power effieiency. Five star is the highest rating & one star is the lowest.

As higher rated models use better insulated tanks and are constructed better, they demand a higher price, which is cost effective if your heater is usually switched on for a long time and you use a lot of water, or if the line water is significantly colder than room temperature. Better insulated tanks will retain the heat generated and ensure higher energy savings.

So as a general rule, the more you use, the higher the rated model you should go for. Opting for an energy-efficient 5-star water heater would bring in several advantages, including lower electricity bills, maximum energy efficiency & safety.