Instant Geyser vs Storage Geysers / Water Heaters

It sounds easy but it is not so simple to buy best geyser from the market. When you have a lot of options available, it is quite difficult to choose. Although the choice varies and it depends upon certain factors.

You must know what your requirements are in the first place, then only you can bet on the right product.

When it comes to buying a geyser, it is not the only thing we have, but there are multiple choices. It creates confusion and thus racking of brains.

Havells Instant Gyeser
Havells Instant Gyeser

To conclude you must know your needs and all the factors that can influence your decision to a large extent. 

First of all, you should know, what is the difference between, Instant Geyser, Storage Geyser and Heaters? Then only you can decide which is suitable for your family and its people.

Let’s see what are the three options you have in detail and then you decide for yourself which one you would like to go with.

Instant Geyser

As the name suggests, an Instant heater is a device that supplies water instantaneously. You can get hot water within a fraction of seconds. However, it is for a family size of 3 or 4 people.

It has a low storage capacity. And it is suitable for not more than 4 people. Because of its low storage capacity, it works well for nuclear families. Instant Geyser can hold up to 3 litres.

Works well on the wattage of 3 to 4.5 KW, as it perfect for blissful bath.

Time requires to heat 

Instant Geysers can take up to 2 minutes to heat the water. As during the cold days, the temperature gets to 4C to 21C and at this temperature it becomes ice.

Thus makes it unable to flow through pipes. When the temperature is at 60C, it gets boiled with the help of an Instant heater within minutes. It also depends on the coating & material of the water tank.

If in case, the input temperature of the water is more than 21C, it hardly takes 20 seconds for the geyser to heat the water. 

Flow Rate of Water

The flow rate of water from taps is 3 litres/minute, while from the shower it is 8 litres/ minute. If you are using a 3 litre/ minute instant heater than you will get water at high temperature from the tap.

But it does not happen with the shower as the flow rate is more, so you will not get water at high temperature.

Usage of Instant Geyser

If you want it to work and serve it purpose well, then you should use it for kitchen purposes, as it has limited storage capacity.

And in the kitchen, less water is required to wash utensils and to cook. 

But on the other hand, if you are planning to use it in the bathroom, then you should have a family size of 2-3, then only you can have the optimum utilisation of the Instant Geyser. 

Storage Geyser

A storage heater is the one which stores more than 5 litres of water and it is also known as an electric geyser.

AO Smith 10 L Storage Geyser
AO Smith 10 L Storage Geyser

It requires electricity to heat the temperature or raise the temperature. Rates of different geysers with different storage capacity vary. You can buy according to your budget and according to convenience.

Time Required 

It takes 5 minutes for a storage geyser to raise the temperature of the water. However, the water remains hot for a longer time, as it gets stored in a large amount. But on the other hand, you have to wait for it to get boiled. You can use it even after hours and it will remain the same.

Best Suitable: 

Just the way, the instant geyser is suitable for cleaning kitchen utensils and also for cooking, similarly Storage heater is suitable for bathroom and cleaning purpose. It is perfect for a family size of four or five people.

It gets stored and you can use it after hours. The heating cost is considerably more than the Instant Heater as it takes time to raise the temperature of the water. 

Convenience and Size

To get the hot water you have to wait for a time duration of 5 minutes. You have to collect it in a bucket before taking bath. The size of the Geyser varies according to the storage capacity. Storage Geysers come in sizes that can hold up to 6 -35 litres of water. Accordingly, the price also changes, larger the capacity more is the price of the geyser.

Pros of Instant Geyser:

1) Space: It comes in a smaller size, and this requires less wall space as compared to the storage Heater. Comes in compact sizes, it gives a more fascinating look and fits perfectly in the bathroom, kitchen or other smaller spaces in the house.

2) Requires less time: Less time is required to heat it. Thus making it more convenient for working-class professionals. The temperature is higher as you can change it accordingly. It can raise the temperature within the time duration of 2 minutes.

3) Saves Electricity: As these geysers work on gas or require heating elements. It doesn’t work on electricity. So, you don’t have to worry about hefty electricity bills.

4) Efficient: Instant heaters are more efficient than Storage geysers because it saves up to 25 to 30 per cent energy cost. It gives supply whenever required without much delay. 

5) Side Effects: It does not release any greenhouse gases or any other harmful residues. Although making it completely environment friendly. Many of the Instant Heater consists of 4 different setting option in which you can easily raise or decrease the temperature.

6) Life span: These geysers can run perfectly for 6- 10 years. If you have a family of 4-5 people you can easily manage to use it according to your needs.

Cons of Instant Geysers:

1) Size: They are smaller in size as compared to the storage heater. They can hold up to 1-10 litres, while on the other hand storage Heater hold up to 30 litres of water.

2) Maintenance: Instant Geysers require more maintenance than usual. It is not suitable for hard water. If you live at a place where there is an issue of hard water then you must go for a storage geyser.

3) Load: It requires high wattage, even though no electricity is used. There is no storing space and thus you don’t have to worry about the wastage.

4) Flow rate: It has a flow rate of 0.5 to 0.6 gallon per minute, as it instantly heats the temperature. The flow rate is low and also the temperature of water from the shower will less.

5) Limited supply of water: The supply is limited as there is not space to store. So it can only supply up to 6 litres of water, it is comparatively less than that of the storage geyser.


      Instant Geyser

        Storage Geyser

       Smaller Size
        Larger in size

     Storage Capacity

      Stores up to 6 litres

 Stores up to 15- 20 litres

          Flow Rate

0.5-0.6 gallon/ per minute

    Flow rate is 3 litres per minute


     More maintenance

       Less Maintenance

   Energy Consumption 

      Less consumption

      More Consumption


   No need of electricity

     Works on electricity


       More efficient 

         Less Efficient 
Instant Geyser vs Storage Geysers/ water heaters


We hope you got all the information you were seeking. As both the heaters have their pros and cons. But you can buy it according to your requirement. There must be certain factors which you should keep in mind before buying one. Although both are work efficient but certain parameters can influence your decision.

Let’s take a quick recap of the things which are important to be taken care of before buying a water heater.

1) Size of the heater

2) Place of use: if you are planning to buy it for the bathroom, then choose the heater accordingly. On the other hand, if you are planning to get it for the kitchen then buy Instant Heater without giving it a second thought.

3) Electricity: If you want to save electricity then go for the instant heater as it does not require electricity. It works on gas or any heating apparatus snd can save you money.

4) Family Size: People with a family size of 4-5 should go for Storage heater. As it can store up to 10 litres of which is enough for usage.

5) Budget: With a low budget, you can choose Instant heater, it will come under 6000-7000 with less or no storage capacity but will work completely fine for 7-8 years.

6) Harmful Gases: The Instant heater requires proper ventilation, as it releases heat but it is not harmful and also no greenhouse gases are released.

7) Efficiency: If we talk about being effective, the efficiency rate of Instant heater is more than the storage one, as it gives boiling water within 2 minutes, in fact, less than 2 minutes of time. The storage heater takes up to 5 minutes to heat up or raise the temperature. 

Leave a Comment