How to choose best Water Heater for India 2019?

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Water heaters are round-the-year products used in the bathroom, the kitchen, or centrally installed to provide hot water through multiple taps.

Water heaters have evolved to become technologically more superior and efficient, and manufacturers have introduced various safety features to prevent any risk of electric shock.

Additionally, the growing interest in maintaining aesthetically-pleasing bathrooms, has sparked a growth in the demand of well-designed bathroom fittings. such as – water heaters. To meet the decor needs of consumers today manufacturers are actively marketing beautifully designed water heaters.

What are the types of water heaters available?

In India. you get water heaters of two kinds – Electrical, that operates on electricity and LPG/Gas Geysers which run on Liquefied Petroleum  Gas.

Of the electrical heaters, there are three types that you can choose from – Immersion Rods/Immersion Heaters, Instant Heaters, and Storage Heaters.

What safety precautions do I need to follow while using a water heater?

Your water heater requires regular maintenance to ensure optimum safety. Some key safety features are:

  • In case you have a water heater with an adjustable knob, set the water temperature below 49 degrees Celsius
  • Follow the manufacturer’s guidelines for recommended maintenance schedule.
  • Keep the area around the water heater clean and free of combustible and flammable material.
  • Sediment build-up can cause premature tank failure, electric element failure, and 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.
  • Never leave children unattended around a water heater.

What kind of water heater should I go for?

When selecting the ideal type of water heater for your home, there are a number of factors that you should look at.


The source of energy (whether electrical or LPG) will affect how your water heater operates, its efficiency, size and cost.


A higher star rating automatically translates to higher energy efficiency.


Before you purchase a water heater, compare its operating costs with other models to see if it would be the right choice for your home.


The right size of water heater is crucial in providing your household with enough hot water for all essential purposes. While considering size, keep in mind the number of bathrooms in your house, the size of your family, and the different applications/usages of the hot water.

There are numerous factors that can influence your purchase decision with regard to water heaters.

Amongst these, one of the most important factors to look at, is the size of the water heater.

The right size of water heater is crucial in providing your household with enough hot water for all essential purposes.

Water heaters are usually sold and selected based on their storage capacity.

A family of three or four may for instance wash two loads of laundry, take several showers daily. and clean the dishes with hot water.

On an average, this may require a lot of hot water, but it doesn’t necessarily mean that the family needs a huge storage heater.

What’s important is to consider the First Hour Rating (FHR), which is the amount of hot water the heater can deliver in a period of an hour (beginning with a full tank of hot water).

You should also consider the number of people in each bathroom. However, please bear in mind that these figures are based on approximation.

The capacities can change based on water usage patterns, weather conditions and inlet water temperature.

Capacity Criteria
6-10 Liters 2 persons per bathroom
15 Liters 1 – 2 persons per bathroom in extremely cold climates
15 Liters or More 3 – 4 persons per bathroom
25 Litres 3 – 4 persons per bathroom in extremely cold climates
35 Liters or More More than 4 people and when you use bathtubs
6-10 Liters Kitchen, mild hot water requirement

Another important factor to consider is the application/usage of the hot water. Based on application/usage, the amount of water required varies.

In addition, climate is an extremely important factor. Colder climates require a larger storage capacity as it takes more time to heat the water. Bigger tanks will ensure sufficient hot water.

The table below will give you some idea about water heater storage capacities in relation to usage and application. The figures are based on usage by 1-2 persons. For more number of people, choose a bigger size.

Usage/Application Storage Capacity
Kitchen Instant heater to 15 liters
Bucket Bath Instant heater to 35 liters
Overhead Showers 15 liters to 35 liters
Bathtubs 25 liters and above
Jacuzzi 50 liters and above
As Required Instant heater – Obtain hot water as much as you require

Aside from the above aspects, also keep in mind the place of installation. Kitchens require smaller capacities as the usage is minimal, while bathrooms require larger storage capacities.

Knowing and being aware of all these aspects will help you make better choices, by getting units that are value for money and have higher energy efficiency.

Do water heaters have any kind of certifications?

The Bureau of Energy Efficiency (BEE) rating of a water heater indicates its power efficiency. Heat is lost primarily when water is in a tank (and not flowing), so the BEE rating applies primarily to storage heaters. including storage gas geysers.

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

Instant Water Heaters

Instant heaters are low-storage capacity units that are available in 1 liter or 3 liters and can heat a small quantity of water instantly.

The typical power ratings for instant heaters today are 3,000 watts and 4,500 watts.

You’ll need a 4,500 watt model if the line water in your home is colder and if you desire hot water quickly.

What factors do I need to keep in mind before purchasing Instant Heater?

Below are some factors that you need to keep in mind before purchasing instant heaters.

Temperature Control


Temperature Control

With instant heaters, there is no knob to control the temperature. This depends on
the rate of flow of water – if you run the water too fast, it won’t be hot enough.
Conversely, if you want the water hotter, you’ll have to run the water at a slower rate.


Energy Efficiency Energy Efficiency

Instant heaters are significantly more energy-efficient as there is no energy wastage.




Size Size

Instant heaters are smaller and therefore more suitable for small bathrooms with low ceilings, as well as kitchens.




Construction Construction

With instant heaters, water is always in motion when the unit is switched on, so material degradation is less of a problem compared to storage heaters.




No Waiting TimeNo Waiting Time

The basic principle behind an instant water heater is that water flows over a heating element – so you get hot water instantly.





What safety precautions must I follow while using an instant heater?

Heed the following safety precautions when using an instant heater:

  • Turn the water tap on before switching the heater on; switch off the heater before turning off the tap
  • After switching off the heater, it is advisable to wait for all the hot water to flow out of the unit before turning off the tap – this reduces corrosion on the heating element
  • Ensure that the power socket used for the heater is properly earthed
  • You’ll often find yourself switching off the heater with a wet finger. Wrap a cloth around your hand when you flick the switch, or ensure that you press the switch at its center so water doesn’t get into it.
  • Unless your instant heater has a dry-heating protection feature, always ensure that the heater is off when you leave the bathroom or kitchen


Storage Heater

Storage heaters are the most common type of water heaters. Those that are used in households can typically store 6 to 50 liters of water though storage units that can hold 150 – 200 liters of water are also available.

Storage heaters contain an insulated tank which heats the water.

One key disadvantage with storage heaters is that energy can be wasted as water in the tank is always heated, but not necessarily used.

Are storage heaters the right type of water heaters for me?

When deciding if this is the right type of heater for you, ask:

How large is your household?

The more the number of people, the larger the water heater should be. For example, if there are four people in your home and you have a 10-liter model, you’ll see heating delays and/or insufficiently heated water.

Do you want hot water from multiple outlets?

With a storage heater, all the taps in a bathroom — or, with some extra plumbing, all the taps on a floor — can provide hot water (or a mix of hot and cold water)

How cold is the line water in your home?

One of the key advantages of a storage heater is the fact that it can provide running water at higher temperatures than is possible with an instant heater. If you live in a really cold area, consider a high-capacity heater – so each person doesn’t have to wait for the water to get reheated.

What factors do I need to keep in mind before purchasing storage water heater?

When deciding on a storage water heater, also factor in all of the following:

Hard Water

If you live in an area with hard water, check whether the tank is suitable for storing hard water.

Temperature Control Knob

This is useful if you want to heat the water to a precise temperature.


Since most households are small, it is essential to select a small and aesthetically no designed water heater that blends well with your interiors.

Nowadays, most water heaters have a glossy finish, come in various subtle colours, and have a better 41RP rust-proof body, which provides a longer shelf life.

Thermal Cut-Out

This feature makes the heater switch off when the heating element gets too hot, which prevents damage to the unit.

Dry Heating Protection

Heaters should be switched on only when water covers the heating unit. The dry heating protection feature switches the unit off, if it’s turned on while empty.

Pressure Release Valve

Some heaters feature a pressure release valve, which allows water to escape through an outlet when the water pressure becomes too high. Without this feature, too much pressure can damage the unit.

Energy Star Rating

The energy star rating of any heating or cooling device certifies its power efficiency. Although a 5 star unit is costlier, it helps you save energy cost in the long run.


Immersion Rods

An immersion heater is an electric water heater that is placed inside a bucket of water.

They act a bit like a kettle, using an electric resistance heater (which looks like a metal loop on coil) to heat the surrounding water. Immersion heaters are connected to their own power supply via a cable and they are the simplest and cheapest type of water heating arrangement.

They need little or no maintenance. You just need to clean the rod when you see a significant amount of deposit.

With immersion rods, you incur no installation costs or hassles (including plumbing, wiring, and wall mounting). They also occupy very little space in your kitchen or bathroom.

Immersion rods are ideal when device cost and operating costs are your priority, and when circumstances do not permit the use of other types (such as in a hostel or a rented home).

The disadvantages of an immersion heater are obvious – you can’t use one to heat running water, and any hot water you store will quickly lose heat.

Additionally, there are chances of hot water spillage, especially while transferring the bucket from one place to another.

What safety precautions must I follow while using an immersion heater?

Heed the following safety precautions when using an immersion heater:

  • The unit should only be switched on after being immersed in water, and turned off before being removed.
  • It shouldn’t be running with no water around the coil. If there is inadequate water, the coil will burn and the immersion rod will be rendered useless.
  • Some rods can be attached to the side of the water bucket (or other containers). These indicate a minimum and maximum water level. Otherwise, you need to make sure that most — but not all — of the heating part of the unit is submerged, otherwise the unit can get damaged.
  • When you withdraw the unit from the water container, it’ll be hot. Be sure to keep it in a place where no-one is likely to touch it.
  • Ensure that children and pets are away from the unit when it is in operation — and when it is kept aside to cool.
  • Before first use, check that the unit is electrically safe. Always buy a product that is certified and of high-quality.

How to use an immersion rod correctly?

Here’s a step-by-step guide to help you use an immersion heater in the right way

Fill a bucket with water, so that it is 90-95% filled Fill a bucket with water, so that it is 90-95% filled
Carefully place the immersion rod into the bucket Carefully place the immersion rod into the bucket
Connect the plug to the socket and turn it on Connect the plug to the socket and turn it on
Once the water is heated, turn off the unit and unplug the cable from the socket Once the water is heated, turn off the unit and unplug the cable from the socket
Carefully take out the unit and place it in a safe area where it is less likely to fall and is out of reach of children and/or pets Carefully take out the unit and place it in a safe area where it is less likely to fall and is out of reach of children and/or pets
Be careful while transporting the bucket to a desired location Be careful while transporting the bucket to a desired location
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