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Top 10 Best Instant Water Heaters (Geyser) in India 2022

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Unlike older days, you don’t have to wait for hours to get the water heated for a bath. An instant or tank-less water heater deliver hot water on-demand rather than heating an entire tank full of water as storage geysers.

The instant water heaters have limited storage capacity and are good for families with 2-3 members. They are compact in size and this makes them an ideal choice for use in the kitchen and smaller bathrooms where you might have space constraints.

Before buying the right instant water geyser for your home, here are a few important factors that you must check.

Geyser Size:

Usually, the capacity of instant geysers varies from 1 liter to 3 liters. You might find a few models with 6 liters capacity too. You can select the size on the basis of the total members of your family.

Tank CapacityFamily SizePurpose
1 LiterSingles/Bachelors (1)For Washing utensils or face wash
3 Liters2 - 3 membersBucket bathing & washing utensils
3 Liters4 - 8 membersFor washing kitchen utensils or for hand wash
6 Liters2 - 4 membersBucket bathing & washing utensils

Geyser Wattage:

Higher the wattage is quicker the heating will be. Instant water heaters either come with 3000 watts (3kW) or 4500 watts (4.5kW). When compared to a 3kW instant geyser, the 4.5kW ones heat up the water quickly.

Bar Pressure:

Bar pressure means the water pressure that hits the tank of the instant water heater. For better results, it is recommended to buy 8 bar pressure geysers if you are living in high rise buildings. They handle the water pressure properly.

However, if you live in an independent house where the pressure is a bit low, you can buy a water heater with 6 or 6.5 bar pressure.

Some other factors like heating element, tank material, and pressure control valve also play an important role in deciding the quality of the instant geyser. We suggest you to check the buying guide at the end of the article to get in-depth knowledge about these factors.

We have also listed the 10 best instant geysers in India along with a detailed review to help you buy the best one for your home.

Best Instant Water Heaters in India

Instant Water Heaters
CapacityWattsBar PressureWarrantyBuy Now
Bajaj Flora Instant Water Heater3 Litre4500 Watts8 Bars2 years on Product,
5 years on Tank
Check On Amazon
Havells Instanio Instant Geyser3 Litre3000 Watts0.65 MPa Bar2 years on product & 5 years on condenserCheck On Amazon
Pronto Neo Instant Geyser1 Litre3000 Watts6.5 bars5 years on inner container,
3 years on heating element and
2 years comprehensive
Check On Amazon
Crompton Bliss Instant Water Heater3 Litre3000 Watts6.5 Bars2 years on ProductCheck On Amazon
Lifelong Flash Instant Water Heater3 Liters3000 Watts8 Bars2 years on productCheck On Amazon
Racold Pronto Neo Instant Water Heater3 Litre3000 Watts6 Bars2 years on Product,
5 years on Tank,
2 years on heating element
Check On Amazon
Anchor by Panasonic Astra Instant Water Heater3 Litre3000 Watts---5 years warranty on inner tank and 2
years warranty on product.
Check On Amazon
Hindware Atlantic Convenio Instant Geyser3 Liters3000 Watts6.5 bars5 Years on Tank, 2 Years on
Heating Element and
2 Years on Comprehensive
Check On Amazon
Morphy Richards Quente Instant Water Heater3 Liters3000 Watts6.5 Bars2 years on productCheck On Amazon
Orient Electric Aura Neo Instant Water Heater1 Litre3000 WattsUp to 6.5 bars5 years on tank and
2 years on product
Check On Amazon

10 Best Water Heater Reviews in India

1. Bajaj Flora Instant 3 Litre Vertical Water Heater

Bajaj Flora Instant water heater

Bajaj has been an evergreen brand and does their best to offer good value to the customers. Also, the pricing of Bajaj Appliances is quite justifiable; you should check out this Flora Instant Geyser from Bajaj.

This one comes with a 3 Litres tank capacity, which seems to be quite apt for a small family of 3 or 4 people. However, the power consumption of this geyser is 4500 Watts, that’s good for instantly heating up water, but it might also add a slight cost to your electricity bill in the long term.

Keeping these things aside, this water heater can work flawlessly even if the pressure reaches 8 bar. And, if you live in a high-rise apartment, this will work the best for you. Moreover, the build quality of the product is superb as it uses the SS 304 material on the inside while the outer covering is made up of high-quality ABS material. Along with that, it also has a Fusible plug to provide better insulation from electricity.

The exterior design of the Bajaj Flora water heater is elegant and won’t corrode that easily, either from outside or inside. Apart from that, you also get a Neon Indicator at the front that shows if the water is heated up or not. Its fire-retardant cable ensures that the situation does not get out of your hands in case of any emergencies.

As we know, Bajaj is quite a trustworthy brand; it even comes with a 5-year warranty from the manufacturer as well.


  • Good safety features
  • Exceptional Build quality
  • Ideal for High-rise apartments
  • Less maintenance required


  • Slightly higher power consumption

Buy Now From Amazon

2. Havells Instanio 3-Litre Instant Geyser

Havells water heater

Havells is one of the most trust-worthy brands that you can buy products in India. The quality of its products is far near to the brands leading the industry globally.

The Havells Instanio Instant Geyser comes in a pretty sleek and modern design that seems like bliss. Moreover, that tank capacity you get in this instant geyser is around 3 Litre. The power consumption of the geyser is 3000 Watts only which you can consider to be a good mark.

On the outside, it has a circular color-changing indicator light that gives it an overall modern look. The outer body of the geyser is made out of rust-proof and shock-proof ABS, while the inside of it contains a 304-grade stainless steel inner tank. Also, it is a good enough product to use in high-rise apartments since it can manage the pressure up to 0.65 MPa Bar easily.

Havells products are quite popular for their reliability, and the safety features of this geyser justify that pretty well. The geyser uses a fire retardant power cord to ensure the proper safety of the users, and it even has certification from ISI for that.

It is definitely going to last for a long time in your house since the brand is offering a 2-year warranty for the product and 5-year warranty for the condenser too.


  • High build quality
  • Includes all the necessary accessories
  • Energy efficient
  • Modern Design


  • Takes a little bit of time to heat up the water properly

Buy Now From Amazon

3. Crompton Bliss 3-Litre Instant Water Heater

Crompton water heater

Crompton is yet another good brand to go for since most of their home appliances are quite reliable and have a good build quality. And, you get to see something similar with this Crompton Bliss Instant Water Heater as well.

Since it comes for a very fair price, you can definitely check out this option if you have a slightly low budget. As the tank capacity of this instant heater is almost 3 Litres, it is even suitable for a joint family as well. Moreover, the power consumption of this heater is around 3000W. Hence, you won’t have to worry much about the electricity bills either.

If we talk about the quality of this heater, it boasts of a Stainless steel weldless tank, which ensures the long life and saves it from corrosion. While the outer body is made up of top-notch ABS material, which makes it rust-free too. Apart from that, it is capable of handling pressure up to 6.5 bar, which also counts as a plus point.

At the front side, you also get two indication lights which tell you if the water is ready to use or not. As for the safety features, it consists of a Multifunctional safety valve too. Along with that, there is a high precision thermostat, reset knob, and pre-set thermal cut-out to ensure total safety for you. Also, the anti-siphon protection resists any backflow of water too.

Crompton offers a brand warranty of 2 years with this instant water heater. Although the quality is good enough that you won’t need to claim for it.


  • Loaded with safety features
  • Stainless Steel Tank
  • A powerful Copper heating element
  • Sleek design


  • No accessories included in the box such as pipes and other parts

Buy Now From Amazon

4. Pronto Neo 1 L 3 KW Instant Geyser

Pronto Neo water heater

Racold, as we discussed earlier, has a wide variety of instant geysers available for all kinds of costumes. Since the products have an amazing life and are reliable to use, you can definitely check out this product.

If we compare this instant geyser with the other based on pricing, this one seems to be a little pricier, considering the tank capacity is only 1 Litre here. However, if you live alone or share your apartment with someone else, this 3000 Watts geyser will be the best for your use.

Moreover, the Pronto Neo geyser has very high-pressure resistance and can withstand the city conditions even if the pressure reaches 6.5 bars. Apart from that, it boasts of an amazing-looking Italian design with an overall rust-proof body from outside as well as inside. Also, the tank comes with SPHP coating and a Ti-Tec Heating Element for faster heating.

On the other hand, you get various helpful features like Smart Bath Logic, Smart Mix that reheats the unused warm water, and saves energy as well as the time. On top of that, it also consists of safety features such as Thermostat and cut-out that ensure that there is no unnecessary power wastage.

Coming to the warranty information on this product, Racold offers a 5-year warranty for the tank. Whereas the heating element has a warranty period of 3 years. In addition, there is a 2-year comprehensive warranty as well.


  • Ideal for a single person
  • Compact
  • Loaded with safety and other advanced features


  • Slightly expensive considering the 1L tank capacity.
  • After-sales services are poor.

Buy Now From Amazon

5. Lifelong Flash 3 Litres Instant Water Heater

Lifelong water heater

Lifelong promises to provide the customers with extremely reliable home appliances, and is quite famous for its other products as well. Also, after-sales services are quite good, especially in India.

Since the price of this instant water heater is by far the cheapest among the list, it is a great option for the budget buyers. However, you still get a 3 Litre tank inside this one coupled with a copper heating element, which is actually very power efficient and consumes around 3000W only.

Apart from that, to block off the internal heat, it also contains a thick layer of PUF material on the inside while the outer body is maintained by the Thermoplastic. This prevents it from getting any corrosion or rusting over time. Besides, you won’t have any issues even if you live at extreme high-rise apartments since it can simply withstand 8 Bar pressure.

Moreover, the indicator lights work decently and tell you about the current status of temperature. As for the safety of your home and people, it also comes with a Thermostat and a cut-out feature that will automatically turn it off before any mishappening.

All the parts of the Lifelong Flash 3 Litres Instant Water Heater are covered under a manufacturer warranty of 2 years. Hence, there should be no issues while getting it repaired if something goes wrong.


  • Ideal to use in cities
  • Less power consumption
  • Pocket-friendly deal
  • ISI certified product


  • No accessories like pipes and knobs included inside the box

Buy Now From Amazon

6. Racold Pronto Neo 3 Litres 3KW Instant Water Heater

Racold water heater

If you are looking for some high-end geyser brand, no doubt, Racold is a good enough brand to choose since the appliances don’t hit your bank account and provide you with amazing and reliable products.

The Racold Pronto Neo Instant water heater that comes with a 3 Litres water tank to which is connected to a high power heating element to provide you with hot water in a matter of minutes after you press the button. Moreover, this Racold water heater is very energy efficient too since the power consumption is around 3000 Watts only.

You can easily use this water heater even if you live in the higher apartments since it is built to handle pressure till 6 bars very easily. Apart from that, you will love its simple Italian crafted design, which offers an amazing combo of style and technology together. In addition, a very thick PUF layer is used as an insulation to control the internal heating.

As far as security features are concerned, it boasts of Anti Syphon System, which ensures that there is no backflow of water. While the Thermostat and Cutout features take care of rising temperatures very well.

Although the build quality of this product is actually very good, for some additional care, the brand provides a 5 year warranty period for the tank and 2 years for the heating element


  • Energy Efficient
  • Italian Crafted design
  • Ideal for a family of four
  • Suitable for high-rise apartments


  • You have to pay extra for installation

Buy Now From Amazon

7. Anchor by Panasonic Astra Instant Water Heater

Anchor by Panasonic instant water heater

For over 5 decades the brand Anchor has been supplying the most trust-worthy electrical appliances all over India. Its latest Astra instant water heater has a 3-liter capacity well suited for high-rise buildings and high-pressure appliances.

Its tank is made of premium quality 304-grade stainless steel that gives it great durability. It comes with a safety valve that is less than 6.5 bar to avoid excessive pressure in the outflow. The outer body is made of sturdy ABS material which avoids rust formation.

Copper, which has the ability to transfer heat rapidly is used in the making of its heating element for better performance. The high precision thermostat that helps in increasing the life of the heating element and the thermal cutout that cuts out the operations automatically when the temperature is too high, gives augmented safety by conforming to international safety standards.

The heater comes with PUF with high density and thickness which retains the heat increasing energy-conservation and decreasing electricity bills.

Anchor brand would like to extend its support to have a long-lasting heater in your home. You will be receiving a 2-year manufacturer warranty on the product and a 5-year warranty on the inner tank.


  • Energy-efficient
  • High density & thick PUF
  • Fire retardant power cord
  • Rustproof body


  • Quality standards are compromised in a few products

Buy Now From Amazon

8. Hindware Atlantic Convenio 3 Litre Instant Geyser

Hindware water heater

Hindware is an extremely popular brand in the Indian market. It has gained a large user base over the period by providing them with amazing reliability and good after-sales services with all their products. 

As for this geyser here, Hindware is offering a decent priced deal with 3 liters of tank capacity, which seems quite a viable option for a small family. Also, the Wattage of the Hindware Atlantic Convenio instant geysers is marked to be 3000 watts, which match up with the industry standards too.

For a product to last long, and be reliable, the quality and materials used to matter the most.

And, to cope up with that, Hindware has made this geyser by using a superior corrosion-resistant stainless steel tank inside. On the other hand, the outer shell is made out of ABS plastic, so there is no chance of any kind of corrosion or rusting on any major part of the geyser. It can simply withstand pressure up to 6.5 Bars making it a reliable product to use in our cities.

Also, it boasts of an i-Thermostat feature that automatically cuts-off the connection after the water is heated well, to ensure that there is no excessive or unnecessary wastage of electricity. Also, it consists of an all-purpose RPR valve that manages to reheat the unused warm water and saves up a lot of time and energy.

If you are concerned about the warranty, the tank of this geyser is covered under a 5-year warranty period while the other part, such as the heating element, has a 2-year warranty.


  • After-sales services are good
  • Affordable pricing
  • Robust build quality
  • Energy Efficient


  • No accessories included inside the box

Buy Now From Amazon

9. Morphy Richards Quente 3-Litre Instant Water Heater

Morphy Richards water heater

You don’t see Morphy Richards quite often in India, but since it has a wide variety of geysers available to showcase, we have picked the best one out of them for you.

The Morphy Richards Quente instant water heater comes in a 3 Litre variant that will be quite suitable for your home if you have a small family. Moreover, its heating element is super-powerful and is capable of providing you with warm water while still being power efficient by consuming only 3000 Watts.

In addition to that, the geyser is made up of top-notch quality exterior, which gives it a unique and modern look while ensuring the safety of it from any rusting or corrosion. On top of that, the indicator light at front is a good addition as well. In case you live in a high-rise building, installing this geyser won’t be a bad decision since it can withstand pressure up to 6.5 bars.

Apart from that, the main highlight of this geyser is its heating element, which the brand claims to be made up of superior quality material to ensure a longer life and reliability of the geyser.

The pricing of the geyser is not that huge either, and you can easily afford it. Moreover, the brand is also providing you with a manufacturer warranty of 5 years, so it seems to be a fair deal after all.


  • Affordable deal
  • Rust-proof body
  • Modern design language
  • Quality of heating element is top-notch


  • You will have to purchase third-party accessories

Buy Now From Amazon

10. Orient Electric Aura Neo Instant 1L Vertical Water Heater

Orient Electric Aura Neo Instant water heater

Orient is actually a prestigious and one of the most well-known brands in the Indian electronics industry. And, we do believe that must have heard of it quite often before too.

However, if we discuss particularly this Electric Aura Neo Instant Water Heater from Orient. It is actually a very good product for daily use for small families since the power usage of this geyser is just around 3KW. The tank size you get with this variant here is 1 Litre, and even the price is not too harsh for your bank account.

The inner tank is made out of High-Grade stainless steel. Hence, there will be no issues like rusting or corrosion of any kind. The copper heating element of the geyser is also covered with Nickel coating to ensure proper resistance from corrosion. On the other hand, the outer shelling is made out of strong ABS material, which is shock and rust-proof too.

Also, this compact geyser is a viable option for the people living in high-rise apartments since it can easily withstand pressure up to 6.5 bars. Moreover, the other safety features include Pressure Release Valve & Anti-Siphon Valve, along with Variable Pressure Compatibility, to make it suitable to use almost anywhere.

Coming over to the warranty information, the tank of this geyser comes with a warranty period of 5 years. Whereas the heating element and other parts of the product have 2 years of warranty.


  • All the accessories are included in the box
  • Ample safety features
  • Ideal for a small family
  • Highly durable product from Orient


  • The extra cost for installation

Buy Now From Amazon

Factors to Consider While Choosing the Best Instant Water Heater

Let us learn about all the defining factors that are very essential and helpful so that you can buy the best instant geyser according to your needs.

1. Water Heater Size:

The appropriate size for the geyser should be the amount of hot water that you would need at once for immediate use.

The instant geysers are available in 1 to 3 liters size. You can also find a few with a capacity of 6 liters.

If you check online, most of the instant water heaters that are available offer a capacity of 3 liters. 1-liter capacity is not really enough to provide a continuous stream of hot water and is thus, not suitable for bathing. However, you can use it for the washbasin.

Here is a table that will help you analyze the quantity of water required that will be suitable for your family. Let’s have a look.

Family Size vs Water Tank Capacity 

Tank CapacityFamily SizePurpose
1 LiterSingles/Bachelors (1)For Washing utensils or face wash
3 Liters2 - 3 membersBucket bathing & washing utensils
3 Liters4 - 8 membersFor washing kitchen utensils or for hand wash
6 Liters2 - 4 membersBucket bathing & washing utensils

2. Geyser Wattage:

Another factor that helps in selecting the best geyser for your home is the geyser wattage. Since the water heats up quickly, the wattage of instant heaters is generally high.

They either come with 3000 W (3kW) or 4500 W (4.5kW). Instant heaters with 4.5kW heat the water quicker than an instant heater with 3kW.

Since the wattage is high, it means that the electric load is going to be high too. For example, in metro cities like Bangalore or Mumbai, if all the houses in the vicinity use a 4.5kW instant heater, the load on the electric grid would be too high. This will eventually lead to tripping or power failure.

Thus, before buying a costly and high-powered device, you should always consider your surroundings and see if the transformer has the capacity to handle the load.

For India houses, 3kW geysers are an ideal choice as they don’t put an unnecessarily high load on the system.

3. Bar Pressure:

The water pressure in the water heaters is measured in “bars”. Hence, bar pressure means the water pressure that hits the water tank in the geyser or heater.

This pressure varies from building to building. For example, if you are living on the 4th floor of a four-storeyed building, the water pressure at your home will be lesser than for the ones living on the ground floor.

When the water pressure gets in direct contact with the inner walls of the water heater tank, there is a high chance that the inner walls get thin and damaged over a period of time. Sometimes, even water starts leaking from the geyser tank.

It is recommended to buy 8 bar pressure geyser for high rise buildings to get better results in water pressure handling.

For those living in an independent house can buy a heater with 6 or 6.5 bar pressure and the water pressure is a bit low for them.

4. Tank Material:

The material with which the tank has been made decides the quality of the geyser. Its quality has a direct impact on the durability and efficiency of the geyser. Generally, the water heater tanks are made using copper, thermoplastic, or stainless steel.

Copper: Copper is a good conductor of electricity and heats the water quickly. However, the rate at which the water cools down is also quick. Thus, the heat retention capacity is low in the copper tanks.

Copper is not corrosion-resistant. This, it must be coated with a good quality anti-corrosive material.

Thermoplastic: The thermoplastic tanks are resistant to corrosion. However, heat retention property is a bit low. To keep the water hot for a long time, it requires an extra inner coating on the tank walls.

Stainless Steel: It is considered as the best material when compared to both copper and thermoplastic as steel offers great insulation and heat conductivity properties. It is durable too but a bit corrosive. However, you can overcome this issue by using a corrosion-free technology.

Tank Material Coating:

  • Glass-lined coating: This type of coating is done on either copper or thermoplastic material to maintain the water temperature for a long period of time. With persistent use, there are chances that this insulation can get damaged in the long run.
  • Vitreous Enamel coating: This coating is recommended for a stainless steel water tank as it offers great resistance against corrosion. It also prevents hard water scaling.

Note: Every company has its own patented name for the tank materials. So, don’t get confused because they all are more or less the same at the end of the day.

5. Heating Element:

The heating element is as important as any other factor. Most of the brands use copper heating elements with a coating to prevent the material from corrosion. Some manufacturers even use a glass-coated Incoloy heating element as they are considered as the best in the market to prevent corrosion. They are expensive though and can last for around 4 years even with hard water as a source.

Another option is the glass-coated copper heating element that works well and is not that expensive. The copper-coated heating element can last for around 2 years even when used with hard water.

6. Power Consumption:

Rather than falling for the marketing gimmicks, you must buy a water heater that is energy-efficient.

The energy efficiency of a water heater is generally determined by the energy star rating (heaters with a 5-star rating are considered as the best).

Higher the BEE (Bureau of Energy Efficiency) star rating is lesser the power consumption will be. This will, in turn, increase the lifespan of the heater.

7. Hardness of Water:

As we all know that hard water creates scaling inside the water tank of the geyser, this leads to the damage of the heating element too. Because of this, the corrosion happens faster and you might have to either repair your geyser frequently or buy a new one.

This is why; you must buy a heater with a corrosion-resistant water tank that is either glass lined or Vitreous Enamel coated.

To avoid the damage caused to other parts like the heating element, you can even buy a water softener. Here the water first goes to the water softener and the output of the softener will serve as an input to the water heater. Since the hard water is turned into soft water, you might not face any corrosion-related issues with the geyser.

8. Fuel Type:

Most of the instant water heaters are based on two fuel types: electricity and gas. In India, using natural gas as a fuel alternative is a bit tricky. Hence, most of the models are electricity-based only. Also, these models are convenient when it comes to installation and power consumption.

We have covered only electric instant water heaters in this article.

9. Price:

You can easily find an instant water heater in a price range of Rs. 2000 – Rs. 3500. The price majorly depends on the capacity that it offers along with the wattage used. High capacity tanks with higher wattage cost a bit more than the regular-sized geysers.

The tank material and the heating material used also have an impact on the price of the instant water heater.

10. Warranty:

The water heaters are more prone to damage, especially if you have a hard water supply at your home. They might require regular servicing and maintenance. Hence, it becomes even more important to buy a geyser from a reputed brand that offers a good warranty and after-sales service support.

You might face issues while giving the geyser for servicing if you buy from a local or lesser-known brand.

Some brands offer a warranty of 4-5 years on the tank and 2-3 years on the body and other parts of the geyser. Some companies even offer an overall warranty of 3 years with a 4-year warranty on the heating element and 8+2 years on the inner tank. The more the warranty period is the better it is.

Additional Features in an Instant Water Heater

Apart from the essential features, some brands offer additional features to the users to make their product more trustworthy and efficient. Some of the useful additional features that you can check for are as follows:

  • Temperature Control:

Most of the tank-less water heaters comes with an adjustable temperature controller so that you can set the water temperature as per your requirement.

Not every model comes with this feature. It is mostly available in high-end versions.  All the basic versions come with a default water boil temperature setting.

  • LED Indicators:

LED indicators are very helpful for the users so that they know what operation is being carried out. It is a must-have feature. Most of the water heaters come with 2 LED indicator options – Green and Red color where green represent power on/off and red is for the heating element.

  • Auto-off Feature:

With an auto-off feature, the heater turns off automatically after it reaches a certain temperature. This feature is very helpful in saving electricity and protecting the heater from any damage or burning. If you have a habit of forgetting to switch off the heater after using it, this can be a really useful feature for you.

  • Temperature & Pressure Control Valves:

These days, along with high bar pressure, some manufacturers even offer temperature and pressure relief valves or T & P valve.

The T & P valve relieves the excess temperature and pressure in the heater when either of them reaches the critical point. The thermal expansion in a closed water heater system is an inescapable fact of the functioning of both normal and abnormal water heater.

In a standard water heater, the water is heated by using either an electric element or a gas burner. When the temperature of the water reaches between 120-140 degrees Fahrenheit, both the water and the heater’s metal tank starts to expand. While a little amount of expansion is considered normal, too much expansion is totally unsafe.

When the water temperature reaches 210 degrees or when the pressure reaches 150 PSI (pounds per square inch), the T & P valve opens and starts expelling steam and hot water through the discharge tube.

Glass-lined coated inner tanks are capable of resisting high pressure and thus, are the most preferred ones.

  • ABS Plastic Body:

The ABS (Acrylonitrile butadiene styrene) plastic helps in preventing the accumulation of rust. It also offers a shock-free body to the users.

  • Fire Retardant Cable:

These cables are helpful in limiting the spread of fire, whenever there is a short circuit.

How does an instant water heater work?

The instant water heaters have a limited water storage capacity with high heating capacity so that the water heats up instantly.

The cold water enters inside the small storage tank via an input valve. The high capacity heating element then heats up the water quickly in the tank. This hot water is then discharged via an output tap.

Since these heaters heat up the water very quickly, they need a lot of power for a short period of time. Thus, they have such high wattage when compared to storage water heaters.

Advantages of an Instant Water Heater

  • The compact body makes it easier to install the heater in any corner of the bedroom or kitchen.
  • These appliances are more energy-efficient as it heats only a required amount of water. Whereas, the storage water heater heats a lot of water which is not even used.
  • They are cost-effective and come at a cheaper price when compared to storage water heaters.
  • The instant water heaters are light in weight.
  • They are highly durable and a few models can even last for 5-10 years.

Disadvantages of an Instant Water Heater

  • Since the average flow rate of a bathroom shower is around 8 liters/min, the instant water heater cannot provide so much hot water instantly.
  • It is not suitable for the colder area as it takes some extra time to heat up very cold water.
  • With 3 – 4.5 kW power consumption, the heater puts extra load on the system that can lead to overload or power failure issues.
  • Since they have very limited (close to no storage at all), to get a continuous flow of hot water, you will have to keep the tap’s flow at a minimal level. Hence it is not suitable for families with more than 2 members.

How to use an instant water heater optimally?

Even though there is no rocket science on how to use the heater properly, there are some basic tips that can help in increasing the efficiency and the durability of the appliance. They are as follows:

As soon as you get up, you can turn on the geyser. It would take around 4-5 minutes to heat up the water. As the indicator tells you that water is hot, you can open the hot water tap at a flow rate of around 20-30%.

This way, you can start filling the bucket with a continuous stream of hot water.

In the meanwhile, you can brush your teeth and use the towel. Let the bucket fill till it is 50-60% full. You can now turn on the cold water’s tap and once the bucket is full, you will get a mix of hot and cold water.

Once you start using the water from the bucket, you can again turn hot water tap on at a 20-30% flow rate followed by cold water so that the bucket is again full for the next member.

If you use the hot water tap at a 100% flow rate, you will have to turn the tap on and off at regular intervals and you might not get hot water so quickly.

How much time does instant water heaters take to heat the water?

The time taken by the instant water heater to heat the water depends on three factors: storage capacity of the geyser (1 liter or 3 liters), the temperature of the input water, and the wattage (3 or 4.5 kW).

On average, the temperature of water in India in the winter season varies from 4℃ to 21℃, depending on the city that you live in.

For the above temperature, it should hardly take a minute to heat the water to bath-ready temperature i.e. 40℃ and around 2 minutes if you like having a bath with very hot water i.e. around 60℃.

Instant water heaters are more suitable for areas where the water temperature does not drop too low like in most parts of South India.


Water heaters are designed to make our life easy. It is upon us to choose the most-efficient heater that also conserves energy for a longer period. Our article here lists out the top well-reviewed instant heaters that are out there in the market.

You can check this article to understand what features in these heaters helped them take a position on the list and why you should choose one among them. The buying guide in this article is written to explain how each factor contributes to an efficient instant heater. To help you further, here is our final recommendation below.

Anchor by Panasonic Astra 3L 3KW Instant Water Heater is designed to work perfectly in high-rise buildings. It is equipped with safety valves that give protection from excessive pressure. It is made with features that enable it to retain the heat for a longer period and avoid any unforeseen accidents.

This article helps you in buying the right instant heater without spending much time looking around. Shop the heater that works well and lasts long.

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6 Responses

  1. Hello
    this is very detail post on instant water heater geyser buy really impressive and great information.
    thanks for sharing keeps it up.

    1. Hi Priti,

      AO Smith’s HSE-SAS-006 is a 6-Litre and 2000-Watt Instant Water Heater that is an ideal and perfect choice. It has an 8 bar pressure rating on the water flow and also a maximum protection against any corrosion due to hard water thanks to the Blue diamond glass lined tank. AO Smith also gives you a 7 years warranty on the inner tank along with a 3 years extended warranty for the heating element and a 2 years comprehensive warranty as well..

      Alternatively, you can also look at either the Racold Pronto Neo 6 Liter or the Surya Instant Water Heater.

      Both are 6 litre instant water heaters and made in India, the Racold Pronto has a PUF insulation, auto cut off and 3 level safety features along with a 5 year warranty on the tank, 2 years on the heating element and 2 years on the overall product.

      The Surya Instant water heater on the other hand is economic, has a flame failure sensor, Over Heat Protection and a 1 year warranty to it.

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