Recirculation pumps - description, selection and control features. Rules for the selection and installation of circulation pumps for hot water systems

Constant circulation of hot water in the house is less than 500 sq. m is not an urgent need. For those who, for the sake of their own comfort, decided to purchase a circulation pump, it will be useful to learn about the criteria for its selection.

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On the picture:

The circulation pump is a device that "drives" water along closed system(DHW circuit).

To not wait for the faucet to flow hot water, the DHW system needs a circulation pump. The pump ensures the movement of water in a vicious circle.

In systems without circulation, it takes longer to wait for water, the longer the distance from the water heater to the draw-off point. Arranging a circulating water supply is no more expensive than buying a high-quality well-known brand boiler. Let's figure out what you need to know for someone who chooses a circulation pump.

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On the picture:

Examples of circulation pumps.

pressure – indicator circulation pump, which allows you to judge the maximum possible height of water supply. For a cottage, this is the distance from the lowest to the highest top point DHW systems, adjusted for the total length of the pipeline.

In the photo: DHW circuit with circulation.

Circulation pump: parameters

• power pump - an indicator of how much electricity the device will consume. Power largely determines other characteristics of the device;
• performance circulation pump (or volumetric flow, or fluid circulation rate) - refers to the amount of water that the pump can move through pipelines per unit of time.

Circulation pump: calculation

Contact the professionals - only they will be able to adequately calculate the characteristics that the circulation pump should have. And then it is they who will be responsible if, due to an error in the calculations, problems arise with the functioning of the system.

It is necessary to take into account many factors that affect the operation of the device: the length and height of the pipeline, its hydraulic resistance, the characteristics of the water points connected to this section of the system, etc.

The estimated pressure of hot water flowing from the tap is taken into account. By the way, maximum permissible value the last parameter is 4.5 bar, but the minimum is not regulated by any normative document except, perhaps, local instructions and recommendations.

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On the picture:

You need to install check valve on the pressure pipe of the circulation pump. Without it, cold water can enter the pipeline and circulate through closed circuit instead of hot. What can cause condensation in the pump.

The number of water taps that can be open at the same time is also important. Simple logic suggests that if a pressure of, for example, 5 bar is created in the circulation pipeline, then when one tap is opened, the pressure will exceed the permissible value and the jet can damage the plumbing equipment.

However, if water is consumed simultaneously through 4-5 points of water intake, then the pressure in each of them will be relatively low. The term "comparatively" in this case means that the amount of water will be enough to rinse your hands, but not enough for a normal shower. A multi-circuit diagram with distribution manifolds, as well as special pressure relief valves, will help prevent this situation.

Interchangeability of circulation pumps

A separate issue when choosing a circulation DHW pump- interchangeability of the device with a pump for the heating system. Despite the external similarity of the devices, interchangeability is limited.

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On the picture:

The principle of interchangeability circulation pumps does not apply to the so-called "double pumps" - devices that secure each other.

The problem is the difference in operating temperatures of the pumped liquid: 60-65°C for hot water and 90-95°C for the coolant.

If necessary circulation pump for heating, can be used on DHW pipelines, but not vice versa! Note that neither a solid power reserve nor high performance, which distinguish the pumps of the heating system, is simply not needed for hot water supply.

Main conclusions:

• the circulation pump for hot water supply is selected in approximately the same way as for the heating system;
• it makes no sense to use a device whose performance is higher than that of a water heater connected to this circuit;
• calculating the parameters for a circulation pump is quite complicated, so you should entrust it to specialists: if you do it yourself, the savings will be negligible, and the probability of error will be too high.

Image used in this article smedegaard.com , wilo.com , dabpumps.com , grundfos.com , salmson.com

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A recirculation pump is a device that is installed in a heating system in order to increase its efficiency and reduce its maintenance costs. The use of a recirculation pump helps to speed up the supply of coolant to heating radiators and avoid heat loss by the liquid inside the system.

Functions of recirculation pumps

Increasingly, boilers are used to heat water in private houses and apartments. As a rule, they are mounted in the basement or in another technical room building. Due to the fact that bathrooms and taps are located in different parts residential building, then residents need to wait until the heated water arrives at a certain point in the building. Often this takes several minutes, as a result of which a certain part of the water ends up in the sewer. The longer the pipeline, the more liquid is lost by the system.

To avoid water and heat losses, many residents install recirculation pumps. They are designed to maintain a stable temperature in front of all water intake points in the house. In addition to the hot water recirculation pump, a drain line is installed in the system, through which the coolant returns to the water heater. However, not all modern water heaters are equipped with a drain connection. In this case, the return line must be connected to the cold water supply line.

Another function of the recirculation pump is to increase the temperature of the coolant in most of the house's plumbing system.

Thus, answering the question: “What is water recirculation?”, we can say that this is an acceleration of the movement of water through pipes and its forced return to the coolant without loss of temperature and liquid properties.

When buying equipment for DHW recycling, it is necessary to determine its main parameters. These include:

• Productivity - this characteristic depends on the area of ​​\u200b\u200bhousing. On average, for a two-story private house or three-room apartment enough unit that pumps 70-100 liters of coolant for a minute;
• Pressure is another important characteristic, which indicates the maximum height of the coolant supply. In the case of a two-story private house, you should choose a device that creates a pressure of 3–4 m;
• Energy consumption - this factor allows you to determine how much it will cost to operate a recirculation pump. At the same time, it must be remembered that the more powerful and productive the unit, the more expensive its use will be;
• The presence of built-in protection - it is best to buy a pump equipped with a water flow switch. This element will protect the pump from running dry and, as a result, overheating of the unit's motor.

Among other important factors, the pump cooling system should also be noted. If the unit is not equipped with ventilation, then its motor will constantly heat up and fail.

A time relay is used to control the operation of the recirculation pump, since the unit is not used for permanent job, but only to maintain the required temperature of the water. In practice, for a well-ventilated pipeline, this time period is 20-25 minutes. Most modern pumps are already equipped with a time switch and a temperature sensor. In such devices, the time interval between turning the pump on and off is set in the program by means of the controller.

Proper adjustment of the device operation can reduce the energy consumption of the equipment by at least 50%. To further reduce energy costs, some models are equipped with a automatic control, which adapts to the specific water needs of the residents. For example, after installing a pump, the system tracks the time the residents use water for 1–2 weeks. After that, the automation of the device receives data that allows it to adapt to certain operating conditions.

Comfort is one of the main characteristics that describe a home. Comfort is a multifaceted concept, and includes many sub-items. One of these sub-points is the constant availability of hot water in the tap. In a house with a centralized supply, public utilities deal with this issue. In summer cottages and suburban dwellings, this problem is solved by homeowners. So, after installing a boiler that heats and accumulates water, you need to somehow deliver it to the tap with a hot tap.

DHW recirculation pump - a device for accelerating the supply of water through pipes.
Main positive sides he owns:

• Significant acceleration of feed along contours.
• If an additional circuit is installed, it will return to the boiler, which will significantly reduce heating costs.
• Noiseless at work. This is ensured by the so-called "wet motor". The motor is placed in a liquid, which in turn absorbs noise during operation, cools the engine, and lubricates its moving parts.

Design:

• Body, visible part.
• Impeller or blades, the movement of which distills the liquid.
• Motor with control board and terminals for electrical connection.

Choosing a recirculation pump

Main characteristics:

• productivity, which is measured in m3 / h or liter / min.
• pressure, which is measured in pascals, it is thanks to him that the possibility of supplying over long distances and heights is determined.
• power consumption in W (electricity consumption).
• control method.

When choosing, take into account many factors and details, so it is best to trust a specialist in this field.

When you come to a specialized outlet, tell the consultant the following data: the amount of water and exit points used per hour, the distance, the height at which the supply will be carried out. Another interesting point is the method of management. There are two types of control: by timer and by temperature sensor. Both have their advantages and disadvantages. Timer controls are convenient in that the owner himself sets the operating time.

Modern recirculation devices have the ability to set timers for a week or even a month in advance. You have the opportunity to put to work for 2 hours in the morning, and for 3 hours in the evening, just when someone is at home. If the control will take place according to the temperature sensor, then it is recommended to insulate the circuits so that heat is not lost. The principle is simple: as soon as the water temperature in the circuit drops below the set data, the engine starts, circulating and driving the hot water from the boiler into the pipes, which will wait for its consumer.

Naturally, when choosing, the brand will be sharp.

With exactly the same characteristics, prices can jump two, three or more times. It is not recommended to buy Chinese goods, as practice shows that their service life is really short. To avoid counterfeiting, purchase a purchase only in large retail chains or specialized stores. Grundfos, Wilo, Dab, Oasis, Bosch, Wester are the most popular and reliable brands on the market in this moment. Although their price is different from competitors, the quality and service life are really impressive. By choosing these brands, you will save extra money and time on repairs, replacements, and maintenance.

Mounting and installation

Installation and installation is not difficult, you can install it yourself or resort to the help of specialists.

If you choose the first option, consider the following factors:

• It is installed on the return line to prevent air from entering the station.
• A non-return valve is installed between the recirculation pump and the boiler.
• It is recommended to connect it not directly to the network, but through an uninterruptible power supply, this will extend the service life and extend the functionality during power outages.
• In the case of several outflow points or a large distance between the bathroom and the kitchen, several bathrooms on different floors. For uniform distribution of pressure, mount complex system regulation of domestic hot water, which includes several distribution manifolds and special pressure reducing valves.
• The engine can only be started when the circuit is full. Running without fluid will cause it to fail quickly. Before starting, do not forget to bleed the air from the circuit and the engine through a special valve.

Video: Installation on a heating system

Diagnostics and repair

Since the device is small, constituent parts he has little, respectively, he does not need special maintenance. Manufacturers recommend changing the filter and cleaning it 1-2 times a year. If he began to create additional noises and / or sounds, you need to remove it and clean it from sand scale. If it stops working, check its connection to electricity, it is not recommended to disassemble the engine yourself. Since disassembly automatically removes from warranty service.

More and more citizens are becoming happy owners country houses. And if earlier country life associated only with hot summer, now the season lasts almost all year round. However, not everyone is ready to put up with the inconveniences of the "old-fashioned" life - modern man For a normal rest, the usual comfort is required. And in our not too mild climate, this concept includes, first of all, warmth in one's own home. That is why, the installation of heating systems is a very burning problem for owners of real estate in nature. Not everyone understands that in order to maintain normal temperature the room requires not only a heating boiler and pipes with batteries, but also a number of rather complex devices and devices, without which there will simply be no heat. One of these indispensable devices is, of course, a circulation pump. And although the selection and installation of this indispensable element It is better to entrust heating systems to specialists, it is also worth navigating the topic to home owners.

Are there heating systems without circulation pumps? Yes, there are. These are the so-called "open" systems. The principle of their operation is based on the phenomenon of convection - the heated coolant is “lighter” than the cold one and naturally rises up, from where it spreads through the branches of the heating system, giving off heat into the air. However, despite the simplicity and relative cheapness, this method of heating is of limited use - primarily because it is suitable only for small houses - up to about 100 m2.

This is a small unit that is installed directly in the pipeline and ensures the movement of the coolant through the pipeline. For heating systems of private houses, pumps with the so-called "wet rotor" are usually used, for example, GRUNDFOS type UPS. A feature of this design is that the cooling and lubrication of moving parts is carried out by a flowing liquid, making the operation of the unit silent and reliable. A feature of modern circulation pumps (CP) is efficiency, durability, small size and noiselessness. Why do you need a circulation pump? As already mentioned, for houses with an area of ​​more than 150 sq.m. it is necessary to use forced circulation of the coolant, since natural convection will no longer be able to provide uniform heating of all heating appliances(batteries). The central heating pump moves the fluid through the system at a predetermined rate, quickly and efficiently delivering heat to all corners of the building. In this case, it is important to choose the right pump in accordance with the hydraulic parameters of a particular heating system. It is better to entrust it to specialists. How to choose the right circulation pump? First of all, you need to know how much heat is needed to heat the house. This is a rather complicated calculation, which includes many parameters and is done by specialists. Everything is important: which windows are installed in the building, how the walls, floors and ceilings are insulated, whether thermostatic valves are provided in the system, etc. etc. The result of these calculations is the determination of the required volumetric flow of the coolant in the system (m3 / h), according to which the pump is selected. During the reconstruction existing system It is preferable to use an adjustable pump. Such central heating independently adapts to changes in flow in the system, is practically silent and very economical. For approximate orientation, you can use the table:

Will the pump create noise in the pipes? Noise in the pipes is usually caused by either incorrectly selected (“oversized”) and installed pump or the presence of air in the system. That is why it is necessary to special attention refer to the selection and installation of central heating. It should be noted that it is recommended to install a hydraulic compensator (membrane booster tank). This tank is placed to maintain the required static pressure in the system. The hydraulic compensator avoids cavitation loads that are harmful to the pump and create noise in the pipes. heating system air gets in, this will also cause a hum. Therefore, before starting the heating, it is necessary to properly remove air from the pipelines. This is done like this: 1. Fill the system completely.

2. Remove air from the “air vents” (special valves on heaters).
3. Turn on the boiler.
4. Turn on the pump and open the radiator valve, making sure that there is water circulation.
5. Let the pump run for a few minutes.
6. Turn off the pump and bleed the system again.
7. Check static pressure and, if necessary, top up the system with water (see Table 2)
8. Restart and, if necessary, adjust the pump (normally this is not required for variable pumps).

Table 2. Required static pressure at the pump inlet.

The heating system is not used in summer. Will there be any problems with the launch of the central heating? Modern centrifugal pumps can turn off without harm to themselves long time. Even if deposits occur in the pump body as a result of stopping, they can be easily removed by switching the unregulated pump to maximum speed. Variable speed pumps such as GRUNDFOS ALPHA+ are equipped with a special release function.

Do the materials from which the CN is made matter? Yes, definitely. Modern models TsN have a shaft and bearings made of ceramics. This not only prolongs the service life, but also makes them practically silent in operation. Doesn't the central heating consume too much energy, because they are always on? It is worth noting that these small devices are very economical and consume no more energy than, say, a small electric light bulb. However, recently all leading European manufacturers of circulation pumps have come to an agreement on a single classification for energy consumption. In accordance with it, all CNs will be assigned appropriate labels, by analogy with household appliances.

At the same time, class “A” pumps (for example, GRUNDFOS ALPHA Pro, which will be available soon) consume an average of 6 W, which corresponds to 90 kWh per year. Even time-tested models (GRUNDFOS UPS 100) will basically correspond to class B. Of course, it should be noted that the most economical adjustable circulation pumps.

How often do CNs need to be replaced?

The service life of a high-quality circulation pump is at least 10 years. For long-term uninterrupted operation, you should follow the recommendations of the manufacturers: choose and install the central pump correctly, use specially prepared water in the system, and prevent the system from “airing”.

Why do manufacturers produce so many types of CN?

A wide range of circulation pumps allows you to make optimal selection for each individual system. This ensures that there are no operational problems and long trouble-free service.

Is it true that there are central heating for hot water? Yes, to increase comfort and save energy in the DHW system individual home you can install a special circulation pump, such as GRUNDFOS Comfort. This will allow you not to wait until hot water comes out of the tap, which not only reduces energy costs, but also reduces water consumption. It is worth noting that in 2002 the GRUNDFOS Comfort pump received a European award for industrial design. The seller said that the pump for increasing the pressure in the water supply network is suitable for heating systems. This is true?

No, pumps for increasing the pressure in the water supply system cannot be used as circulation pumps, despite the resemblance! GRUNDFOS UPA pumps serve only to maintain required pressure water in the system, if for some reason it is not enough for normal operation household appliances or gas column. Other types of pumps are intended for heating systems (UPS, ALPHA+, etc.). What is the difference between CN for "warm floor" systems?

When installing underfloor heating, all loops must be balanced for the same pressure drop, while the pressure loss in the longest loop (no more than 120 m) is determined by required pressure pump. Due to the small temperature difference and the large pressure difference in an underfloor heating system, a larger pump is required than for a radiator system. In addition, it should be noted that each room must have its own control system. Due to the variable required flow in the system, it is recommended to use adjustable LP - ALPHA or UPE. Table 3 shows indicative data for the selection of pumps for underfloor heating.

So, in our review, we tried to answer most of the questions that buyers of circulation pumps have. Of course, as already mentioned, the calculation and installation of heating systems is a complex matter and requires a qualified approach. However, understanding how the system works and why and how its various elements serve is not difficult and quite accessible to the modern homeowner. Moreover, such knowledge will not only facilitate the operation of the house, but also allow you to make a choice with open eyes. the best option among the diversity of today's market.

Circulation pumps Wilo Star RS have the following features: electrical connection is possible both on the left and on the right side terminal box, the motor housing can be mounted in any position relative to the pump volute, the main requirement is that the shaft must always be horizontal. Heat carrier temperature range from -10 to +110°С. For ease of installation on the nozzles of the circulation pump there are ebbs under the wrench. The pumps use graphite plain bearings and a shaft made of of stainless steel. Pumps are not required additional protection And Maintenance. New design impeller and electric motor increases efficiency and reduces power consumption. Noise level of pumps does not exceed

Application area

in cooling systems

in air conditioning systems

in water heating systems

Advantages

simple installation

reliability in work

resistant to blocking current

three speed steps

Permissible pumped liquids

heating water

water glycol mixture

Main technical characteristics

head max. - 6 m.

consumption max. — 3.5 m3/h

mains connection 1~230 V, 50 Hz

temperature of the pumped medium from -10°С to + 110°С

operating pressure max. — 10 bar

threaded connection Rp1

materials

pump housing - gray cast iron

impeller - composite

bearings - metal graphite

shaft - stainless steel

Contents of delivery

pump

seals for threaded connection

Ebara circulation pumps with dry rotor

PumpsEbara LPSlinear circulation pumps are made of stainless steel AISI 304. They are designed to work in air conditioning, cooling, heating and hot water systems. The lightness of the design allows one person to install the pump, while the installation of conventional cast iron or bronze pumps requires additional personnel and equipment.SPECIFICATION Max. possible suction pressure:
2 bar for all single-phase models and three-phase LPS 25
4 bar for three-phase LPS 32-40-50
Max. working pressure - 10 bar
Max. pumped liquid temperature: 100 ° C MATERIALS The pump body, casing and impeller are made of stainless steel. AISI 304 steel, AISI 303 shaft.
Bracket and motor housing are made of aluminium.
Fur. oil seal made of graphite/ceramic/NB R SPECIFICATIONS Asynchronous 2-pole motor
Class F insulation
Protection class IP 55
1~220V 50Hz, 3~380V 50Hz
Automatic thermal protection against overloads for single-phase versions
Thermal protection can be used for three-phase versions
Connection: flanges PN 10

And pumps from European manufacturers offered for installation:

Recirculation pumps

A recirculation pump is installed to circulate drinking water in the hot water system small systems heating. Thanks to the operation of the recirculation pump, you will immediately receive hot water after opening the tap. The pump is equipped with a spherical rotor, which virtually eliminates impeller blockage by impurities and lime deposits contained in the water. A simple and reliable plug connector allows easy connection of the pump to electrical network, making it easier to use.

Application :

• hot water systems and small heating systems
• closed industrial systems
• cooling and air conditioning systems

pumped environments :

The pump pumps clean, non-viscous and non-corrosive liquids free of fibers and solids, hot water and softened water.

Let's take for example the parameters of one of the popular recirculation pumps from GRUNDFOS - 15-14 BUT thermostat + timer

UP 15-14BUT is a recirculation pump with an insulated shell. The flow part of the pump is reliably isolated from the stator by a spherical shell. The engine with a "wet" rotor provides almost silent operation of the unit. If necessary, the pump can be easily disassembled without removing the housing from the pipeline. No special maintenance required. A timer and a thermostat are included as accessories with the pump. The timer allows you to program the time when the unit is turned on and off in order to reduce energy consumption, and the thermostat allows you to adjust the pump to turn off when set temperature water. Distinctive features * spherical rotor
* timer (time relay)
* thermostat
* low power consumption
* low noise
* high quality materials
* defence from lime deposits
* convenient installation
* long term servicesAdvantages Installing a drinking water circulation pump in the hot water system allows you to get hot water immediately after opening the tap.
The time relay (timer) automatically turns the pump on and off at set intervals.
The thermostat turns off the pump when the water temperature reaches a certain value (between 35°C and 65°C).
The pump is equipped with a spherical rotor, which virtually eliminates impeller blockage by impurities and lime deposits contained in the water.
A simple and reliable plug connector makes it easy to connect the pump to the mains, simplifying its operation.

- a device designed to pump liquid through the hot water supply system at home. With this equipment, you can heat the room, supply all the taps hot water.

Using a circulation pump allows you to save on electricity and avoid water overruns. The main thing is to take responsibility for choosing a model, choosing a unit that can fully satisfy your needs.

The use of a circulation pump for hot water supply (DHW)

The essence of the operation of the circulation pump is the constant distillation of water through the system, which does not allow it to cool. The installation of such a device will significantly improve living conditions in a private house, if there is a need for constant availability of hot water, heating water in the pool or heating.

In homes where water heaters are installed to provide hot water, you have to drain a decent amount of liquid until hot water flows, and this significantly increases its consumption. The optimal way out is the selection of a circulation pump that minimizes the differences between centralized and autonomous water supply.

Thus, there are three main tasks that can be solved by installing this equipment:

• Hot water supply;
• Air conditioning;
• Heating.

The principle of operation of the circulation pump: the main closed-type pipeline passing through the entire building, with pipes extending from it to all water supply points, is connected to the boiler.

Hot water continuously circulates through the system, which allows households to get water at the desired temperature at any time, simply by opening the tap. They don't have to drain cold water while waiting for the liquid to heat up. A return pipeline is connected to the tank so that unused liquid flows back.

The circulation pump at high working capacity, has small size, affordable price, consumes little energy, does not make noise and is easy to install, which makes it more attractive to consumers.

What parameters should be guided by when choosing?

The pump should be selected according to its characteristic, which is the dependence of two indicators on each other:

pressure

The flow must be sufficient to ensure all water points good pressure , taking into account possible hydraulic losses. Highest value The hydraulic resistance of the system, which the pump is able to overcome is called the maximum head. Head is measured in meters of water column.

Performance

Before choosing, it is necessary to calculate the maximum load of the system and compare it with the pump performance. Usually in the house the value of hydraulic resistance is within 0.1 - 0.2 atm. The highest value of the pumped amount of coolant per unit of time is the maximum performance.

Not superfluous in the functions will be protection against lime deposits, low noise during operation, low power consumption.

Also when choosing optimal model, it is worth considering the operating conditions: type of boiler for hot water, required liquid temperature, pipeline diameter, etc.

Optimal choice

Device design

There are two varieties this device: with dry and wet rotor.

Units of the first type are characterized by large dimensions and noise, lack of natural lubrication, since the rotor remains dry (the device is separated from the pumped liquid). But pumps with a dry rotor are characterized by high performance (up to 70%), because the engine is less susceptible to heating from the coolant.

Wet rotor pumps, on the other hand, are small in size and practically do not make noise during operation. The impeller and rotor are installed directly in the pumped liquid, which provides both lubrication and cooling, and contributes to the absorption of operating noise.

Due to the accumulation of deposits on the surface of the device, the rotor may jam, you need to regularly inspect the equipment.

The temperature range at which the unit is able to function normally is much wider for pumps with a dry rotor than with a wet one. In connection with these "dry" are more often used in industry, and "wet" in private homes, especially since the latter are cheaper.

In addition, there is a division according to the type of connection: with a flange and a coupling connection.

Models in which the suction and discharge pipes are located in the same line can be embedded in the system. Fastening occurs with the help of special frames.

Unit Performance

Pay attention to the following factors:

1. You should not buy a unit whose performance is much more than the value you need. In this case, energy overexpenditure is possible. For a private house, a device with a pressure of 3-4 meters is enough.
2. It is worth choosing a model from proven and well-established manufacturers in the market.
3. When buying a device, consider the temperature environment, to prevent it from freezing, which will lead to malfunctions.
4. The larger the diameter of the pipeline, the more powerful the pump will be required.

If the unit is not intended to be used permanently (seasonally or as a make-up for the main system), do not apply great importance its power. The loads on it will be small, which means it makes no sense to overpay.

• the device must be installed on a pipeline of the diameter for which it is intended. Otherwise, you will have to sacrifice pressure;
• the presence of a timer will allow you to set the operating mode of the pump, and it will automatically turn on during the highest fluid consumption.

Modern models are equipped with special sensors that save water and energy: thermostat, timer, auto-settings.

Cost calculation

The circulation apparatus can be purchased from 5000 rubles and more, depending on specifications and manufacturer's brand.

Grundfos brand pumps - prices in the range of 8000 - 15000 rubles with a head of 1.20 m.w.st., DAB 7000 - 9000 rubles with a head of 1.60-5.70 m.w.st., Wilo 5000-7000 with a head 2-6 m.w.st. respectively. The price of consumed energy is approximately 720 rubles or 200 kW per year.

These small expenses will allow you to use hot water at any time, heat the room and even warm the water in the pool.

The use of a circulation pump can significantly reduce water consumption, because now you do not have to wait and drain the water until it warms up.

Learn more about the circular pump by watching the video:

Special functions allow not only to save fluid consumption, but also the use of electricity: various thermostats, timers, sensors allow you to control the operation of the device, turning it on and off at the right time.