Instantaneous water heater

Hot water from the tap - immediately and without a long wait. Flow heaters make it possible. But which device should you buy? And what should you pay particular attention to when buying? In the following article you will learn more about the high-quality and inexpensive instantaneous water heaters from the eibabo® shop. Find out more about the different electrical and hydraulic variants and find your ideal device.

What are instantaneous water heaters?

Instantaneous water heaters are a convenient and energy-saving way of heating water. The devices only heat the water when a consumer is opened, for example a water tap. Instantaneous water heaters usually have a high heat output. A major advantage lies in the decentralized water heating. Hot water is generated and provided where it is needed - in the kitchen, in the bathroom, in the guest toilet or in the shower.

What should I look out for when buying an instantaneous water heater?

There are a few things to consider when choosing a suitable instantaneous water heater. The more precisely you know your needs, the easier it will be for you to select a suitable device. Ask yourself the following questions:

  • Where should the instantaneous water heater be installed? Is there enough space?
  • What hot water requirements do I want to cover with the device? This results in the required power of the device.
  • Is the device powered by electricity or gas?
  • Can I do the installation myself or do I need a specialist company?
  • Would choosing a boiler be the better decision?
  • Is my electrical installation designed for a powerful device?
  • Is simply heating the water enough or do I want to be able to determine the temperature precisely?

 

Source: eibabo®, Stiebel Eltron DEM 6 electronic instantaneous water heaterImage: Stiebel Eltron DEM 6 electronic instantaneous water heater

The advantages of instantaneous water heaters

Instantaneous water heaters have a number of key advantages over other heating systems:

  • Energy efficiency: The efficiency of instantaneous water heaters is high. Although the use of an instantaneous water heater consumes a lot of electricity, these costs are only incurred when hot water is actually required. The expensive provision of warm water is no longer necessary.
  • Space-saving and flexible: You can install small instantaneous water heaters discreetly under the sink or washbasin. This means that these devices can also be used where there is only a cold water connection, for example in the workshop or garage.
  • Direct water heating: The distance to a central water heating system can be far. Several liters of cold water often have to pass through the pipe before the warm water reaches the tap. The reaction time of instantaneous water heaters is short. As a rule, you will have warm water within a very short time.

 

How do instantaneous water heaters work?

A flow heater consists of a heat exchanger, a cold water connection, sensors, a heating element and valves. The device is connected to a power source and the cold water is introduced into the pipeline. A sensor registers the flow and switches on the heating element. There is a heating element in the pipe that heats the water. As soon as the water has reached the desired temperature, it flows through a pipe to the consumer. Some water heaters are equipped with a thermostatic mixing valve that regulates the ratio of cold to hot water. This allows a specific useful temperature to be set. Depending on the type of device, its mode of operation differs. There are hydraulic water heaters, electronic water heaters and gas water heaters.

Hydraulic instantaneous water heater

With hydraulically controlled instantaneous water heaters, the water is heated with up to three heat output levels. It is not possible to set the water temperature precisely to the degree. The water is heated with a bare wire heating element. This is washed directly by the water. The desired temperature is set by adding cold water at the tap.

Please note

With hydraulically controlled instantaneous water heaters, you cannot heat very small amounts of water due to their design. A minimum flow rate is required to turn on the heating element.


The advantage of hydraulically controlled instantaneous water heaters is the shorter reaction time and heating-up time. With these devices, the risk of calcification is significantly reduced.

Electronic water heater

Electronically controlled instantaneous water heaters measure the water temperature using a temperature sensor. You select the desired temperature on the device. An admixture of cold water can be omitted when using electronically controlled instantaneous water heaters. Depending on the power of the heating element, the capacity for heating the water is limited. Therefore, a flow rate regulator may limit the amount of water to allow the unit to reach the desired water temperature. The advantages of electronic instantaneous water heaters are increased ease of use and improved efficiency.

Gas instantaneous water heater

The principle of water heating is the same for gas instantaneous water heaters as for the other variants. However, the heating element is not heated by electricity but by a gas flame. With modern devices, the energy of the flowing water is sufficient to ignite the heating flame. On some models, the flame ignites using a battery. Old devices have a permanently burning pilot flame, which ignites the heating flame when the water flows.

What requirements do instantaneous water heaters place on the electrical installation?

For the use of instantaneous water heaters, a large amount of electrical power is required. Your electrical installation must be equipped accordingly. Instantaneous water heaters with a connected load of 18 kW, 21 kW, 24 kW, 27 kW or 33 kW are common. Compact instantaneous water heaters usually have a connected load of 11 kW or 13.5 kW and are sufficient for showering, for example. Another variant of instantaneous water heaters are small instantaneous water heaters. These are devices with an output of 3.5 kW to 6.5 kW. These small instantaneous water heaters are mainly used to supply individual taps with only a low hot water output.

 


An example:

Experience has shown that you only need a little lukewarm water in a guest bathroom that is used occasionally. A compact instantaneous water heater with an output of 5 kW to 6 KW would be sufficient for this.


 

Please make sure that the dimensions of the power lines and the fuse protection of the circuit can cope with these requirements. Plan carefully and estimate your needs beforehand. If an instantaneous water heater is to supply boiling hot water to several frequently used tapping points, you need a powerful device.

What is the difference between a boiler and an instantaneous water heater?

Instantaneous water heaters produce hot water when it is needed. Boilers, on the other hand, are small, medium or large containers in which the water is stored and kept at a certain temperature. Once the water has reached the desired temperature, it stays in the boiler until needed. Boilers are typically designed for use in homes where the demand for hot water is high.

The quality of the water

Water from the instantaneous water heater is not stored in a tank where bacteria or other germs can possibly colonize. The high temperatures provide additional protection. The water thus remains suitable for the preparation of food, provided that the original water quality also allows this.


Which manufacturers of instantaneous water heaters are recommended?

In the eibabo® technology store you can get instantaneous water heaters from all leading brands, such as Bosch Thermotechnik, Clage, EHT AEG, Glen Dimplex, Stiebel Eltron and Vaillant. All of these manufacturers offer high quality, modern technology and energy-efficient operation. Benefit from our low prices, secure payment methods and worldwide shipping.

By the way: In order to make your selection easier, the products in our catalogs are sorted by relevance.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Hot water appliances > Instantaneous water heater you will find items from the following product groups:

Item overview:

  • Compact instantaneous water heater
  • Dehumidifier
  • Dial
  • Electric hot water
  • Electric instantaneous water heater
  • Electric water heater
  • Electronic
  • Fully electronic
  • Hot water
  • Hydraulic
  • Mini instantaneous water heater
  • Remote control
  • Sensor fitting
  • Small instantaneous water heater
  • Undercounter unit
  • Water heater
  • Water heating


from the following manufacturers:

Manufacturer overview catalogue Instantaneous water heater:

  • Bosch Thermotechnik
  • Clage
  • EHT AEG
  • Glen Dimplex
  • Stiebel Eltron
  • Vaillant


 
Hot water from the tap - immediately and without a long wait. Flow heaters make it possible. But which device should you buy? And what should you pay particular attention to when buying? In the... read more »
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Instantaneous water heater – hot water quickly and conveniently

Hot water from the tap - immediately and without a long wait. Flow heaters make it possible. But which device should you buy? And what should you pay particular attention to when buying? In the following article you will learn more about the high-quality and inexpensive instantaneous water heaters from the eibabo® shop. Find out more about the different electrical and hydraulic variants and find your ideal device.

What are instantaneous water heaters?

Instantaneous water heaters are a convenient and energy-saving way of heating water. The devices only heat the water when a consumer is opened, for example a water tap. Instantaneous water heaters usually have a high heat output. A major advantage lies in the decentralized water heating. Hot water is generated and provided where it is needed - in the kitchen, in the bathroom, in the guest toilet or in the shower.

What should I look out for when buying an instantaneous water heater?

There are a few things to consider when choosing a suitable instantaneous water heater. The more precisely you know your needs, the easier it will be for you to select a suitable device. Ask yourself the following questions:

  • Where should the instantaneous water heater be installed? Is there enough space?
  • What hot water requirements do I want to cover with the device? This results in the required power of the device.
  • Is the device powered by electricity or gas?
  • Can I do the installation myself or do I need a specialist company?
  • Would choosing a boiler be the better decision?
  • Is my electrical installation designed for a powerful device?
  • Is simply heating the water enough or do I want to be able to determine the temperature precisely?

 

Source: eibabo®, Stiebel Eltron DEM 6 electronic instantaneous water heaterImage: Stiebel Eltron DEM 6 electronic instantaneous water heater

The advantages of instantaneous water heaters

Instantaneous water heaters have a number of key advantages over other heating systems:

  • Energy efficiency: The efficiency of instantaneous water heaters is high. Although the use of an instantaneous water heater consumes a lot of electricity, these costs are only incurred when hot water is actually required. The expensive provision of warm water is no longer necessary.
  • Space-saving and flexible: You can install small instantaneous water heaters discreetly under the sink or washbasin. This means that these devices can also be used where there is only a cold water connection, for example in the workshop or garage.
  • Direct water heating: The distance to a central water heating system can be far. Several liters of cold water often have to pass through the pipe before the warm water reaches the tap. The reaction time of instantaneous water heaters is short. As a rule, you will have warm water within a very short time.

 

How do instantaneous water heaters work?

A flow heater consists of a heat exchanger, a cold water connection, sensors, a heating element and valves. The device is connected to a power source and the cold water is introduced into the pipeline. A sensor registers the flow and switches on the heating element. There is a heating element in the pipe that heats the water. As soon as the water has reached the desired temperature, it flows through a pipe to the consumer. Some water heaters are equipped with a thermostatic mixing valve that regulates the ratio of cold to hot water. This allows a specific useful temperature to be set. Depending on the type of device, its mode of operation differs. There are hydraulic water heaters, electronic water heaters and gas water heaters.

Hydraulic instantaneous water heater

With hydraulically controlled instantaneous water heaters, the water is heated with up to three heat output levels. It is not possible to set the water temperature precisely to the degree. The water is heated with a bare wire heating element. This is washed directly by the water. The desired temperature is set by adding cold water at the tap.

Please note

With hydraulically controlled instantaneous water heaters, you cannot heat very small amounts of water due to their design. A minimum flow rate is required to turn on the heating element.


The advantage of hydraulically controlled instantaneous water heaters is the shorter reaction time and heating-up time. With these devices, the risk of calcification is significantly reduced.

Electronic water heater

Electronically controlled instantaneous water heaters measure the water temperature using a temperature sensor. You select the desired temperature on the device. An admixture of cold water can be omitted when using electronically controlled instantaneous water heaters. Depending on the power of the heating element, the capacity for heating the water is limited. Therefore, a flow rate regulator may limit the amount of water to allow the unit to reach the desired water temperature. The advantages of electronic instantaneous water heaters are increased ease of use and improved efficiency.

Gas instantaneous water heater

The principle of water heating is the same for gas instantaneous water heaters as for the other variants. However, the heating element is not heated by electricity but by a gas flame. With modern devices, the energy of the flowing water is sufficient to ignite the heating flame. On some models, the flame ignites using a battery. Old devices have a permanently burning pilot flame, which ignites the heating flame when the water flows.

What requirements do instantaneous water heaters place on the electrical installation?

For the use of instantaneous water heaters, a large amount of electrical power is required. Your electrical installation must be equipped accordingly. Instantaneous water heaters with a connected load of 18 kW, 21 kW, 24 kW, 27 kW or 33 kW are common. Compact instantaneous water heaters usually have a connected load of 11 kW or 13.5 kW and are sufficient for showering, for example. Another variant of instantaneous water heaters are small instantaneous water heaters. These are devices with an output of 3.5 kW to 6.5 kW. These small instantaneous water heaters are mainly used to supply individual taps with only a low hot water output.

 


An example:

Experience has shown that you only need a little lukewarm water in a guest bathroom that is used occasionally. A compact instantaneous water heater with an output of 5 kW to 6 KW would be sufficient for this.


 

Please make sure that the dimensions of the power lines and the fuse protection of the circuit can cope with these requirements. Plan carefully and estimate your needs beforehand. If an instantaneous water heater is to supply boiling hot water to several frequently used tapping points, you need a powerful device.

What is the difference between a boiler and an instantaneous water heater?

Instantaneous water heaters produce hot water when it is needed. Boilers, on the other hand, are small, medium or large containers in which the water is stored and kept at a certain temperature. Once the water has reached the desired temperature, it stays in the boiler until needed. Boilers are typically designed for use in homes where the demand for hot water is high.

The quality of the water

Water from the instantaneous water heater is not stored in a tank where bacteria or other germs can possibly colonize. The high temperatures provide additional protection. The water thus remains suitable for the preparation of food, provided that the original water quality also allows this.


Which manufacturers of instantaneous water heaters are recommended?

In the eibabo® technology store you can get instantaneous water heaters from all leading brands, such as Bosch Thermotechnik, Clage, EHT AEG, Glen Dimplex, Stiebel Eltron and Vaillant. All of these manufacturers offer high quality, modern technology and energy-efficient operation. Benefit from our low prices, secure payment methods and worldwide shipping.

By the way: In order to make your selection easier, the products in our catalogs are sorted by relevance.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Hot water appliances > Instantaneous water heater you will find items from the following product groups:

Item overview:

  • Compact instantaneous water heater
  • Dehumidifier
  • Dial
  • Electric hot water
  • Electric instantaneous water heater
  • Electric water heater
  • Electronic
  • Fully electronic
  • Hot water
  • Hydraulic
  • Mini instantaneous water heater
  • Remote control
  • Sensor fitting
  • Small instantaneous water heater
  • Undercounter unit
  • Water heater
  • Water heating


from the following manufacturers:

Manufacturer overview catalogue Instantaneous water heater:

  • Bosch Thermotechnik
  • Clage
  • EHT AEG
  • Glen Dimplex
  • Stiebel Eltron
  • Vaillant
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