Instant Geyser vs Storage Geyser Best Geyser Guide [2019]

Instant Geyser vs Storage Geyser- Best Geyser Guide [2020]

In this Guide, you will learn different Water heaters (Geysers) available in India. Also learn what is the difference between Instant Geyser vs Storage Geyser.

Water heater (Geyser) are basic items that we need in our day to day life. 

And this Guide will helps you to make the better choice before your purchase.

If you are you looking to buy a water heater? Then many questions which come to your mind like - 

What should you buy? 

Which one is better? Instant water heater vs storage water heater?  

How do you decide between different types of water heaters?

​​In this detailed guide, I will explain everything.

Let's jump in

What is Water Heater (Geyser)

In simple words - Water Heater converts your cold water into hot water.

Geyser is just another name for water heaters.

Water heaters are also called heat exchangers. 

It use fuel like electricity , gas or solar power.

I have explained about all these types in this guide including instant geyser vs storage geyser.

What is Water Heater (Geyser)

How to use Geyser (Water Heater)

Are you are confused about how to use geyser?

Its not really a rocket science. There is no special skill required.

To use the Geyser there is no need to understand how Geyser works. You just have to open the tap ( where Geyser is installed ) and that's it .

Its just really two steps

First, on the fuel supply to Geyser. Like on the switch in case of electricity geyser.

And second, Use hot water tap for hot water. That's it.

Types of water Heaters (Geysers) in India

Let’s see the types of water heaters available in the market.

They are mainly divided in five category.

  • Storage Water Heater (Geyser)
  • Instant Water Heater (Geyser)
  • Solar Water Heater (Geyser)
  • Instant Electric Shower Water Heater (Geyser)
  • Gas Water Heater (Geyser)

Storage Water Heater (Geyser)

It is also known as a tank-type water heater. 

Why ?

They have a tank for storing hot water. 

The water could be heated by solar power, electricity or with domestic fuel.

In India, Water heater for homes are designed  to store up-to 25 litre.  And its good for 4-8 members

Geyser capacity for 2 person is just 6 litre.

There are many storage water heater available with smaller capacity for kitchens.

This kind of heater is most suitable where you need high flow or volume rate.

In this guide I also have explained instant geyser vs storage geyser. And it will help you to understand better.

Storage Water Heater (Geyser) Advantages and Disadvantages

  • Their electricity consumption is less
  • They are not expensive
  • It doesn’t need much maintenance
  • It is sturdy and simple in operation
  • storage water heater are very common in India. 
  • If the hot water, if not used within a given time, will lose heat to the surroundings.
  • Depending on the capacity of the tank, it will stop the flow of hot water after a while.

Instant Water Heater (Geyser)

Instant Water Heater (Geyser)

It is also known as instantaneous flow.

Because they do not have a water tank.

They are a relatively new concept.

The best thing about Instant Water Heater (Geyser) is their compact size. 

They consume power at a much higher rate and provide you water instantly. 

As its name suggest, In Instant water heater is there is no tank or storage.  

That's why they are small and compact.  And less space required to install.

It uses electricity and natural gas as a source of power.

Instant Water Heater can provide a continuous flow of hot water as long as you require.

The water flow rates depend on power.

And flow of water is high enough for all household purposes.

The initial costs for Instant Water Heater are higher in comparison to storage type. You can see more details in instant geyser vs storage geyser section. 

Instant Water Heater (Geyser) Advantages and Disadvantages

  • The biggest advantage of instant water heater is that they waste no energy. Energy is consumed only when in use.
  • These units are small and compact. So they don't take much space.
  • The parts in the circuit are expensive. Maintenance needs a professional  help.
  • The instantaneous flow costs more in running because of the high power consumption.

Solar Water Heaters (Geyser)

Solar water heaters are really environment friendly.


Because they use solar power as a source of energy.

The solar water heater contains a unit called collectors. And it collect heat from the sun. 

This heat can directly be used to heat the water by using a heat exchanger or converted into electricity.

This electricity is then used as the power source for heating.

Flat plate collectors are the ones you mostly placed on the roof of buildings and homes. This collects heat from surrounding. 

The unit also comes with a controller that decides when the pump is switched on.

It takes into account the temperature difference between the storage tank and the water in the exchanger.

This feedback mechanism ensures that the pump isn’t operating more than required.

In India most people prefer other types instant geyser vs storage geyser. 


Because solar heater little expensive. But at the same time environment friendly.

Solar Water Heater (Geyser) Advantages and Disadvantages

  • Once installed, the running costs are very low. 
  • The maintenance cost is low as well.
  • The payback period is too long.
  • The initial cost is very high because of the set-up.
  • And the installation needs a professional help.

Electric Shower Water Heater (Geyser)

This is just another variation of the instant water heater. 

It’s a unit that looks like a shower.

And it does the same function of a shower. 

Electric Shower Water Heater (Geyser) is quite popular.

Why ?

Because of the low cost and ease of installation. 

Electric Shower Water Heater (Geyser)

The purpose of this kind of water heater is limited.

Just one Single purpose - Shower!

Gas Water Heater (Geyser)

There is one another type of Heater - Gas Water Heater (Geyser)

Gas water heaters can run on household LPG cylinders.

Also they can work on compressed natural gas (CNG) 

These kind of Heaters are not common . you can find more about Gas Water heater here.

How do you decide Best Water Heater (Geyser) ?

There are main 6 ways to compare is to see them across the following criteria. And it will help you between instant geyser vs storage geyser as well.

  1. 1
    Cost of Installation  : Installation Cost of Water heater.
  2. 2
    Running Cost : Running cost of Water Heater. It includes electricity consumption or fuel consumption. 
  3. 3
    Time Lag : Time Lag is important. When ?  If you are looking for a quick shower. It is the delay between you switching on the geyser to the time you get the hot water.
  4. 4
    Volume Rate: It can be measured in Litre/minute. This tells you the rate of flow of hot water.
  5. 5
    Total Capacity :  This is for the storage type water heaters. It tells you the capacity of water heater. How much hot water heater can store at a given time?
  6. 6
    Ease of Maintenance : Every device needs maintenance. You wouldn’t want a geyser or water heater that needs a frequent visit by the service personnel.

So, which one is better?

Instant Geyser Vs Storage Geyser

You read about the features of two water heaters.

Both have their pros and cons.

Here is a simple way of deciding between instant geyser vs storage geyser.

Instant Geyser Vs Storage Geyser
Instant Water Heater

Lets find out if Instant water heater is good option for you.

  • You don’t mind paying a little extra.
  • You like taking long showers.
  • You have a small bathroom or kitchen.
  • There is not much electricity fluctuation.
  • The climate is mostly cold.
  • You need hot water continuously.

What is your most response for above statements?

If yes, then Instant Water Heater is the right choice for you.

Storage Water Heater

You need storage water heater if you like these statements.

  • If you don’t mind having a bulky water heater in your house.
  • You have to balance the budget.
  • You don’t need hot water all the time.
  • You stay at a place with a moderate climatic condition.
  • You don’t mind a little energy wastage.

If this seems good, Storage Water Heater is good option for you.

Water Heater vs Solar Heater

Similarly like, instant geyser vs storage geyser, we can compare solar geyser. 

This is again a choice of two fundamental criteria. 

  • Are you willing to spend a huge amount?  Can wait comfortably for the payback period?
  • Do you think the climatic conditions are good enough for solar-powered water heaters?

If the answer to both questions is yes, then a solar water heater is great. 

Otherwise, the choices are instant and storage water heaters.


Before buying,  you should understand your needs. And you can decide instant geyser vs storage geyser.

A water heater is not a thing we can buy every day.

So, it makes a lot of sense to invest some time in learning about it.

And, once you understand everything, the selection becomes easier.  

In case you have any question please feel free to contact me.

Now its your turn to share your feedback with me. 

  • Updated January 24, 2020
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