Rating TOP-10 indirect heating water heaters. Selection tips and characteristics of the best models

What is an indirect water heater. The device and the principle of operation of the device. Selection criteria and the best models of indirect heating water heaters.

water heater indirect heating allows you to provide uninterrupted supply of hot water to all family members at any time of the day.

In this case, a shortage or a sharp decrease in the temperature of the liquid is excluded.

What kind of device it is, how it works and what the best models are - about this and not only in this article.

Rating of the TOP 10 best indirect heating water heaters

Place	Model	Price
The best models up to 100 liters
#1	Hajdu ID 25A
#2	Kospel SWR-100
#3	Drazice OKC 100 NTR
The best models from 100 to 200 liters
#1	Drazice OKC 125 NTR
#2	Hajdu ID 40A
#3	BAXI Premier Plus 150
#4	BAXI Premier Plus 200
#5	Drazice OKC 200 NTR
#6	Hajdu ID 50A
#7	Kospel Termo Hit WW 120

What is an indirect water heater?

Capacitive indirect heating boiler - a device for heating water of an existing heating system.

Stay up to date! The device heats the liquid to a high temperature and keeps it hot for a long time.

Indirect type water heaters can be installed in houses, apartments, hotels, sports complexes, boiler rooms, offices and industrial enterprises.

The principle of operation of an indirect heating boiler

Usually, water heater of this type installed next to heating boiler.

The principle of operation and the device of such a boiler similar to work and design direct type water heaters.

Main structural elements:

a tank made of high-quality steel, plastic and covered with glass ceramics, glass porcelain, enamel;
a case, also made of plastic or metal, which protects the tank from mechanical damage;
heat insulator made of foam rubber or polyurethane;
brass or steel coil heat exchanger inside the water tank;
magnesium anode element that protects the structure from corrosion;
thermostat and safety valve to prevent pressure increase inside the boiler.

Principle of operation indirect water heater uncomplicated.

Should know! The boiler simply heats the water to the desired temperature in conjunction with a heating boiler connected to it by a pipeline.

Liquid circulation occurs due to a special system of pumps and mixers.

The water heater is connected to the water supply through the "input" for cold water. Hot water is supplied through the "outlet".

What parameters to pay attention to when choosing a water heater?

There are several important points to note here:

Economic expediency.
An indirect heating unit should be purchased with a high volume of hot water consumption (for example, in a family of four or more people).
When heating a room with an electric boiler, the use of such a boiler will increase financial costs.
Volume of the tank.
It is also selected based on the volume of consumption.
It is believed that on average one person needs no more than one hundred liters of hot water per day.
Power.
The efficiency of the device depends on this parameter.
The higher the power, the more productive the device, but also less economical in terms of electricity consumption.
Heater material.
Anti-corrosion protection inside the boiler is provided by enamel or glass-ceramic, or stainless steel or titanium (in more expensive models).
Dimensions and weight.
All indirect heating devices have impressive dimensions and corresponding weight.
When choosing a water heater, it is necessary to take into account the size of the room where it will be installed.

The best models up to 100 liters

Keep in mind! These relatively small water heaters can be installed in private houses, apartments, small offices.

As a rule, their performance is close to average.

Rating of the best models up to 100 liters according to customer reviews and ratings.

Hajdu ID 25A

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The storage water heater Hajdu ID 25A is an ideal solution for heating hot water in a variety of situations in domestic reality.

The tank in this model is thermally insulated with polyurethane and covered with a steel casing painted with a special powder enamel.

The inside of the boiler is covered with a durable glass-enamel layer, which ensures clean water without deposits and scale.

Multi-level protection design eliminates breakdowns and premature aging of equipment over a long period.

Specifications:

tank volume - 100 l;
coolant heating - 95 degrees;
area and capacity of the heat exchanger - 0.62 m², 18.5 kW;
vertical version, bottom connection, wall mounting;
weight - 40.6 kg.

Advantages

simple installation;
effective heat retention;
it is possible to install additional automation;
it is possible to install a heating element as an additional source of heating.

Flaws

expensive model compared to competitors;
big weight;
for wall mounting only.

Kospel SWR-100

The vertical heater of indirect heating Kospel SWR-100 will provide efficient heating of water in everyday life and at work, keeping its temperature for a long time.

The device is intended for use in conjunction with heating boilers of any type, it can be connected to solar panels and other energy sources.

The boiler is installed directly under the heating boiler.

The inner tank of the heater is made of high quality enamel coated steel. Special thermal insulation minimizes heat loss.

Specifications:

tank volume - 100 l;
heating of the coolant - 80 degrees;
area and capacity of the heat exchanger - 0.4 m², 12 kW;
vertical version, bottom connection, floor mounting;
weight - 31 kg.

Advantages

designed taking into account the specifics and features of domestic communications;
can be connected to any type of heating boiler;
stable floor design;
sleeve for temperature sensor, recirculation pipe and thermometer included;
spiral heat exchanger, designed for a pressure of 1 MPa.

Flaws

there is no possibility of connecting a heating element;
protective cover is not provided.

Drazice OKC 100 NTR

The accumulative indirect water heater Drazice OKC 100 NTR will provide a house or apartment with heat and uninterrupted hot water supply, regardless of the state of the local heating system.

The inner surface of the boiler tank contains an anti-corrosion coating.

The case is painted with high quality powder enamel.

The unit is equipped with a recirculation system, a relief valve in the kit, an anode rod to extend the service life, a visual means of monitoring the water temperature.

Specifications:

tank volume - 95 l;
heating of the coolant - 80 degrees;
area and capacity of the heat exchanger - 1 m², 24 kW;
vertical version, bottom connection, wall mounting;
weight - 56 kg.

Advantages

built-in indication of inclusion;
there is protection against overheating;
built-in safety valve;
frost protection is provided;
it is possible to connect several points of water sampling.

Flaws

build quality is not too high;
rather high price for this class of heating devices.

The best models from 100 to 200 liters

Such devices are recommended for installation both in residential and industrial/office premises.

Note! The increased volume of the tank implies more power and, accordingly, a greater cost of equipment.

The best models from 100 to 200 liters.

Drazice OKC 125 NTR

The Drazice OKC 125 NTR model has a reliable protection of the inner surface of the tank against corrosion, which is a special enamel coating.

A device with indirect water heating allows you to provide the room with hot water from a working heating boiler.

The heater is equipped with recirculation, special relief valve, magnesium anode rod for corrosion protection.

The polyurethane insulator ensures minimal heat loss. There is a visual control of the water temperature and a frost protection system.

Specifications:

tank volume - 112 l;
heating of the coolant - 90 degrees;
heat exchanger area and capacity - 1.45 m², 32 kW;
vertical version, bottom connection, floor mounting;
weight - 66 kg.

Advantages

4th degree of protection against water;
high-quality enameled inner coating of the tank;
the presence of a safety valve;
high build quality;
high power.

Flaws

there is no possibility of installing a heating element;
big weight;
according to user reviews, water heating is lower than stated.

Hajdu ID 40A

Water heater indirect type Hajdu ID 40A at any time of the day will provide hot water to residents of a house or apartment, office or production workers.

The water heater has a special sleeve for installing a boiler sensor or thermostat.

The steel tank and spiral heat exchanger are coated with high quality glass enamel.

The magnesium anode protects the device from corrosion. With a sufficiently large weight, the boiler is quite easy to mount on the wall.

Specifications:

tank volume - 150 l;
coolant heating - 95 degrees;
area and capacity of the heat exchanger - 0.62 m², 18.5 kW;
vertical version, bottom connection, wall mounting;
weight - 49 kg.

Advantages

large volume of the boiler tank;
sufficient power;
stylish design;
installation of a flange electric heater is possible.

Flaws

there is no branch pipe for recirculation of hot water;
non-universal mount (only on the wall);
build quality is not perfect.

BAXI Premier Plus 150

The versatile Baxi Premier Plus 150 indirect heating boiler is efficient and economical compared to systems that heat water with electricity and has a higher performance.

The unit does not have a built-in heating element, but the possibility for its installation is provided.

The water tank is made of high quality stainless steel. This model is universal, it can be installed on the floor or hung on the wall.

For greater convenience of connection, the cold and hot water supply is made from above. An important feature of the boiler is the integrated recirculation circuit.

Specifications:

tank volume - 150 l;
heating of the coolant - 65 degrees;
area and capacity of the heat exchanger - 0.79 m², 30 kW;
vertical version, bottom connection, universal fastening;
weight - 31 kg.

Advantages

coil-in-coil heat exchanger;
the possibility of installing a heating element;
stainless steel tank;
thermocouple included;
contacts are brought to the block.

Flaws

incomprehensible installation instructions;
cheap plastic case of the electrical unit;
low water temperature.

BAXI Premier Plus 200

The storage indirect boiler Baxi Premier Plus 200 is an efficient water heater with a tank made of high quality stainless steel.

A high-performance coil-in-coil heat exchanger is responsible for heating the water.

It ensures that the set temperature is quickly reached in a short time.

The boiler is compatible with almost all modern models of gas and liquid heating boilers. The option of installing a heating element is present.

Specifications:

tank volume - 200 l;
heating of the coolant - 65 degrees;
area and capacity of the heat exchanger - 0.79 m², 30 kW;
vertical version, bottom connection, universal fastening;
weight - 38 kg.

Advantages

the inner coating of the tank is made of stainless steel;
compatible with all types of boilers;
connection of a recirculation circuit is provided;
built-in thermostat;
stable body design;
small own weight.

Flaws

the model cannot be called easy to install;
no heating element (the possibility of installation is provided optionally);
low heating of the coolant.

Drazice OKC 200 NTR

The Drazice OKC 200 NTR storage device with an indirect heating method is protected from corrosion by an innovative glass-ceramic coating with zirconium, the latter, in addition, has antibacterial properties.

The device is mounted vertically on the wall. It is recommended to connect to external systems with a heat carrier with a pressure of up to 1 MPa.

There is a thermostat for adjusting the water temperature, an indicator for controlling the heating inside the tank.

The case is covered with white enamel, heat-insulated with a special high-density material.

Specifications:

tank volume - 208 l;
heating of the coolant - 90 degrees;
heat exchanger area and capacity - 1.45 m², 32 kW;
vertical version, top connection, floor mounting;
weight - 95 kg.

Advantages

huge boiler tank;
there is a safety valve to relieve excess pressure;
using an external thermostat, you can easily set the temperature of water heating;
equipped with a precise capillary three-terminal control thermostat, which saves energy;
the heat exchanger is made of steel 3 mm thick.

Flaws

noisy device;
inconveniently made water supply from below;
high price.

Hajdu ID 50A

The multi-level implementation of the protection system for the Hajdu ID 50A storage water heater eliminates its premature failure and guarantees trouble-free operation of the device for a long period.

The equipment works directly from the boiler. The tank, thermally insulated with polyurethane, is closed with a steel casing.

Inside the walls of the boiler are covered with a reliable glass-enamel layer, which ensures the purity of the water.

If necessary, the user can install a heating element or an additional automation unit.

Specifications:

tank volume - 190 l;
coolant heating - 95 degrees;
area and capacity of the heat exchanger - 0.62 m², 18.5 kW;
vertical version, bottom connection, wall mounting;
weight - 64 kg.

Advantages

the ability to install a boiler or thermostat sensor;
the tank and the spiral heat exchanger are covered with a special high-temperature glass enamel;
magnesium anode for corrosion protection included;
It is possible to connect hot water recirculation.

Flaws

no built-in thermostat;
you can not install a heating element;
wall mounting only.

Kospel Termo Hit WW 120

The Kospel Termo Hit WW 120 model belongs to the class of wall-mounted indirect heating boilers designed using the most modern technologies.

The device does not have a built-in heating element, although there is a possibility for its installation.

The water tank is made of steel and covered with high-strength enamel. The boiler is equipped with one heat exchanger.

Since the unit is designed for wall mounting, it has a lower cold and hot water connection.

The equipment includes a recirculation circuit.

Key parameters:

tank volume - 120 l;
heating of the coolant - 80 degrees;
area and capacity of the heat exchanger - 0.5 m², 11.4 kW;
horizontal version, side connection, wall mounting;
weight - 36 kg.

Advantages

modern design;
horizontal installation;
the possibility of installing a heating element;
the presence of a protective magnesium anode;
affordable cost.

Flaws

low power and performance;
imperfect build quality;
meager equipment "by default".

Reviews

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Conclusion

When planning the installation of one of the heaters discussed above, one should not forget that:

indirect type boilers are suitable for use both at home and in the office / in production;
these devices have impressive dimensions and require free space for installation;
when choosing a heater, it is necessary to take into account its economic feasibility, pay attention to technical details;
buy better models of well-known brands specializing in the production of equipment of this type.

Useful video

From this video you will learn how it works and how to tie an indirect heating boiler:

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