Small-sized circulation pump for heating. Water circulation pumps for heating systems of private houses. Additional factors influencing choice

If speak about modern systems heating cottages or small houses, first of all, we should probably note the heating boiler, which takes on the functions of heating the coolant, water to a certain temperature, produces heat for heating, etc. But, obviously, this is absolutely not enough to feel comfortable in the house, because this heated coolant must somehow be distributed through pipes, heat exchangers, radiators so as to achieve a constant required temperature. This is where the so-called “heart” of the heating system comes to the rescue - low power heating pumps.

The operating principle of such pumps is approximately this: through a pump hot water from the heating boiler it moves through the stages of pipelines in the house (one or more), through radiators, thermal convectors or other heating devices, then it returns again through the pipeline to the heating boiler. When the water temperature drops to a predetermined level, the heating boiler is restarted and the process is repeated completely.

In fact, water in such a closed system moves in a circle, and the pump only overcomes friction. This explains the low power of circulation pumps used in domestic heating systems. The power consumption of these pumps is very low, approximately the same as a regular light bulb, 100 watts.

Modern circulation pumps from well-known companies, such as German Grundfos or Wilo, which are quite often used in domestic heating systems, are equipped with three power levels. Manual three-stage speed switches allow you to control the system even without the use of additional automation. If the house becomes hot and the pump continues to work at full capacity, it is enough to reduce the power of the pump, as the flow of coolant in the system will also decrease, and the temperature on the heating devices will drop.

It is also possible to connect the pump to the power line via a thermostat (temperature sensor). Then the operation of the pump will depend on the temperature in the rooms; it will turn on automatically only when the temperature in the house drops below the desired one. Despite their low power, pumps of this category can provide heat to rooms with an area of 200 to 750 square meters. m.

Grundfos today also offers circulation pumps with built-in electronic control (Grundfos Alpha or Grundfos UPE). They are capable, depending on the needs of the system, of changing the rotation speed of the electric motor. Pumps of this generation save about 60% of electricity and reduce hydraulic noise in pipelines.

Types of heating systems and main blocks of a closed pipeline

There are two options for heat supply lines: closed and open. The latter option is practically not used in the construction of new cottages and houses. A closed circuit provides faster and better heating of the house. The main disadvantage of such heating is its dependence on electricity. However, people in our country are accustomed to the specific service of the relevant services and often use autonomous sources of electricity (diesel or gasoline generators).

The closed loop is different from its predecessor ( open system) additional blocks. Such a heating main requires the operation of several components:

hot water boiler for heating the house;
bimetallic, steel radiators or cast iron batteries;
pipelines (metal or metal-plastic);
expansion tank (closed or membrane type);
sensors, filters and valves;
circulation pump (pump).

Reliable closed-type heating is impossible without any of these blocks. Each of them performs a specific function. Hot water or antifreeze is delivered through pipes from the boiler or furnace to the radiators. The batteries, heating themselves, raise the temperature in the room. However, if in an open circuit the water cycle was ensured by the laws of physics, then in a closed circuit additional mechanisms are used. In modern systems, circulation pumps are used to move the coolant for heating private houses.

Design and principle of operation of a heating pump

A pump for closed heating in a private house is one of the main components. A lot of advertising and information booklets have been written about boilers and radiators. With other components, including pumps, it is more difficult. Of course, in any store today there is a specially trained person who will tell and show everything. Often, even if you don't want it. However, in order to avoid becoming a victim of the consultant’s unprofessionalism or bad mood, it is better to study the available information in advance.

The circulation pump includes:

housing made of corrosion-resistant material;
ceramic rotor;
a shaft with a disk with blades fixed on it;
electric motor

The principle of operation is not complicated. The electric motor starts the rotor, as a result, the coolant is drawn in from one side of the pump and, when exiting from the other, creates the necessary pressure in the system. The movement of water or antifreeze in heating lines is created by two types of devices: dry or wet. Each of them has strong and weaknesses. The perpetual motion machine, unfortunately, has not yet been invented.

Dry and wet pumps - what's the difference?

The name "dry" speaks for itself. During operation, the rotor of such a device does not come into contact with the coolant. Protection is provided by special cuffs, ideally ground to each other. Its main advantage is considered to be high efficiency - 80%. However, the operation of this mechanism is accompanied by loud noise. As a rule, it is purchased by homeowners whose boiler room is soundproof or located in a separate building.

"Wet" circulation pump

Some models of these devices are capable of raising air vortices in the room. Of course, air itself cannot cause harm, but the suspension of microparticles raised by it can penetrate the housing and damage the rotor protection. As a result, the heating pump in a private home will be the first to fail, followed by the entire heating system. Manufacturers of high-quality equipment have added a microscopic water layer to the design to protect internal mechanisms. It protects the device from mechanical damage and acts as a lubricant. However, this does not prevent regular Maintenance– the rubbing parts of the electric motor must be renewed and lubricated.

Both the engine and the impeller (disk with blades) of the “wet” device are immersed in the coolant. The fluid acts as a lubricant and cools the motor. This is the feature that gives this type of pump its name. Wet pumps are characterized by relatively low efficiency - a maximum of 60%. But at the same time, they are in constant demand among homeowners. The explanation is simple - the pros outweigh the cons. The advantages of wet pumps include low level noise, long service life and ease of maintenance.

"Dry" circulation pump

The service life of the device is increased due to the use of materials that are resistant to corrosion and chemically active elements. The pump's electric motor is protected by a special casing made of anti-corrosion materials.

What is the power of circulation devices?

When studying equipment, people are guided by the declared power and often purchase devices with a “reserve”. An unnecessary and harmful precaution for the system. Circulation pumps ensure the movement of water or antifreeze, rather than pumping cubic meters of water to farming.When choosing a pump for the heating main, pay attention to the following data:

Boiler. It should always be more powerful than the pump;
Pipe length and diameter. The most common section is 1 or ¾ inch. In such systems, the coolant is consumed at a rate of 15 to 30 liters per minute. The indicators are given for boilers with a capacity of 12–30 kW (they heat houses with an area of 120–300 sq. meters). By the way, when the length of the lines exceeds 80 meters, a second pump is installed.

A correctly selected and installed pump ensures the following standards:

a ten-meter pipe has a pressure of 0.5 meters;
the average temperature of the coolant is 95 degrees when leaving the boiler and 65 when returning.

Heating engineers and engineers on thematic forums have proven that for a house with an area of 100 square meters. meters, a pump with a power of 25 kW will be enough.

Additional factors influencing choice

An important characteristic is the power supply of the device. Some pumps operate only from the home network, while others only need a 12-volt uninterruptible power supply. Another option that increases the functionality of the pumps is the way they control air release. A distinction is made between manual and automatic. Devices operating automatically do not require human intervention. This is a tangible plus - it is often necessary to involve third-party specialists to remove air from the system.

Almost all pumps offered to consumers operate in three speed modes. This allows you to quickly respond to changing climatic conditions. When the temperature drops, it is enough to increase the rotor rotation speed, and the coolant will flow into the system radiators faster.

To summarize, we can say that the pump is selected individually for each home. It is optimal to use a pump with a dry rotor in large facilities where permanent residence of people is not expected or to install it in a separate room. For a private home, a low-noise wet pump with an automatic air release function is more suitable. The power of the device is calculated based on the area of the house. Even if it costs more.

First of all, of course, the circulation pump must correspond to the characteristics of the boiler, which, in turn, are selected based on their heated area. Otherwise, if there is insufficient flow, the “extreme” batteries will be too cold.

The approximate formula for calculating the required performance is simple: Q = 0.86 x P/dt. Here P is the thermal power of the system, and dt is the temperature delta at the boiler outlet and return. That is, if we use a 40-kilowatt boiler and want to provide a delta of 20 degrees (usually this value is taken for normal operation), then in theory it will be enough for us to have a productivity of 1.72 cubic meters per minute. Then why did we list much more efficient pumps in the rating? Wait, that's not all.

During operation, the circulation pump must overcome the hydraulic resistance of the heating system. Please note that it is this that is important, and not the height of the system: the return balances the supply, that is, if the resistance was equal to zero, the pump would not actually be loaded with pumping. But in reality, pipes and radiators will always have resistance. A rough calculation for a two-pipe system gives the required lift height equal to the number of floors multiplied by a factor from 0.7 to 1.1; for a collector-beam system it increases to 1.16-1.85. That is, if we heat two floors with a “two-pipe”, and the boiler is in the basement, then the pump requires a lift height of about 3.3 m. Again, less than the pumps in the rating.

The fact is that volume height and pump performance are antagonists: increasing resistance inevitably limits performance. Therefore, each pump’s documentation contains a “height-performance” graph for each speed. So, the pump that suits us should have a graph such that the points of the required performance and lift height intersect approximately in the middle - such “ midpoint» guarantees us that the pump will not be overloaded. This is especially important at the time of start-up, because the motor has to spin up immediately under load. Accordingly, the maximum performance and lift height figures for a properly selected pump will be higher than those obtained from the calculation.

Also keep in mind that glycol coolants have a higher viscosity compared to water, and the graphs are given specifically for water: you also need to make a reserve for this. In this case, the manufacturer must directly indicate in the pump characteristics the maximum concentration of propylene glycol in the coolant.

Finally, the pump itself must match the installation method(not everyone can work both horizontally and vertically), installation dimensions. Otherwise, the already assembled heating will have to be redone.

Circulation pumps are becoming more and more common modules in home heating systems. They ensure proper circulation of the coolant, which contributes to uniform heating of the entire household. The service life of modern models reaches 10-15 years. Let's see how to choose and install the right water pump for heating a house and why it is needed in general.

The need for circulation pumps

Before we tell you how to properly install a circulation pump for heating your home, let's talk a little about why it is needed in a heating system. Thin plastic pipes have appeared on sale quite recently. Their predecessors are thicker, large-diameter metal pipes. Possessing a solid margin of safety and increased throughput, they ensured the unhindered flow of coolant through the heating system.

Previously, water pumps were not needed, since thick pipes did not create serious hydrostatic resistance. The design of old heating devices should also be noted - their impressive internal volumes did not create any special obstacles to the flow of coolant. Only the circuits had to be mounted according to a special scheme:

A high pipe was installed from the boiler, raising the coolant above all heating devices;
An expansion tank was mounted at the highest point;
The supply pipe was mounted at an angle so that the coolant flows freely towards the radiators;
The return pipe had to be installed at an angle towards the heating boiler.

This scheme, which did not include water pumps, ensured excellent heating performance.

Problems were created only if it was necessary to heat big house. In this case, the coolant flows through the system with difficulty, since the large circuit creates high resistance. The longer the pipes and the more heating devices, the more obstacles there are. In two-story mansions, the resistance reaches the highest values. As a result, we observe:

The voiced problems can be solved in two ways - by more carefully designing the heating system circuit or by using a water pump.

Uneven heating of the heating system;
Cold branches;
Boiler water overheating.

Features of modern heating systems

A water heating pump is a small device with an electric motor and an impeller that ensures normal coolant circulation in the system. In modern heating, doing without it takes its toll a large number of bends, small clearance of plastic and metal-plastic pipes, as well as a small capacity of heating devices.

This number of obstacles causes an increase in hydrostatic resistance in the heating system. The abundance of additional elements also has an effect - these are thermostatic valves, manifolds, hydraulic arrows and much more. Many problems are created by the desire to hide all the pipes in the walls so that only the radiators are visible from the outside - in this case, you cannot do without a water pump for heating the house.

Adding fuel to the fire is the complete absence of slopes in modern heating - all pipes are located in a horizontal plane, without deviations in height.

Water pumps are in demand in closed heating systems. Here the coolant flows in a closed circuit without contacting the atmosphere. To install the systems, thin plastic pipes are used, so it is simply impossible to ensure normal flow of coolant here - it is necessary to install a water pump for heating.

The pump can also be installed in an open-type heating system, immediately after the heating boiler, but always before the expansion tank, and not after it.

Two pumps in the heating system or more

In order to ensure economical heating operation, we recommend purchasing more advanced energy-saving models of water pumps.

The water pump for circulating water in the heating of a private house is often not the only one in the system. Fashion recent years are water heated floors. They provide heating for floor coverings, creating a comfortable atmosphere for people to stay. Since the basis for their manufacture is thin pipes made of cross-linked polyethylene, independent circulation of the coolant in them is impossible. Therefore, an additional pump is installed in the system.

Underfloor heating systems require the installation of a water pump. It is placed in junction box, next to the thermostatic valves, after which it must be connected to the mains. It works only in the underfloor heating circuit, while the second pump circulates the coolant through the rest of the heating circuit.

There are also diagrams of heating systems with several heating circuits. When planning to create independent heating for floors and rooms, consumers think about how many pumps are needed to heat a private home. One electric pump is installed here as a common one, in the supply or return, then a separate pump is installed for each circuit.

How to choose a water pump for heating your home

A heating pump for a private home is selected according to several basic parameters:

Productivity and pressure;
Rotor type;
Power consumption;
Control type;
Coolant temperature.

Let's look at how to choose water pumps for heating a private home.

Performance and pressure

Correctly made calculations will help you choose the unit that best suits your needs, which means it will help you save your family budget.

The performance of an electric water pump refers to its ability to move a certain amount of water per minute. The following formula is used for calculation – G=W/(∆t*C). Here C is the thermal capacity of the coolant, expressed in Wh/(kg*°C), ∆t is the temperature difference in the return and supply pipes, W is the required heating power for your home.

The recommended temperature difference when using radiators is 20 degrees. Since water is usually used as a coolant, its heat capacity is 1.16 W*h/(kg*°C). Thermal power is calculated for each household individually and expressed in kilowatts. Plug these values into the formula and get the results.

The pressure is calculated in accordance with the pressure loss in the system and is expressed in meters. Losses are calculated as follows - losses in pipes are considered (150 Pa/m), as well as in other elements (boiler, water purification filters, radiators). All this is added up and multiplied by a factor of 1.3 (provides a small margin of 30% for losses in fittings, bends, etc.). There is 9807 Pa in one meter, therefore, we divide the value obtained by summation by 9807 and obtain the required pressure.

Rotor type

Home heating uses water pumps with wet rotor. They are characterized by a simple design, minimal noise levels and no need for maintenance. They are also characterized by small dimensions. Lubrication and cooling in them is carried out using a coolant.

As for dry-type water pumps, they are not used in home heating. They are bulky, have a high noise level, and require cooling and periodic lubrication. They also require periodic replacement of seals. But they have a large throughput capacity - for this reason they are used in heating systems of multi-storey buildings and large industrial, administrative and utility buildings.

Power consumption

The most modern water pumps with energy consumption class “A” have the lowest power consumption. Their disadvantage is their high cost, but it is better to invest once to get reasonable energy savings. In addition, expensive electric pumps have lower noise levels and a longer service life.

Control type

Through a special application you can get information about the operation of the device wherever you are.

Typically, the rotation speed, productivity and pressure are adjusted using a three-position switch. More advanced pumps are equipped with electronic control systems. They control the parameters of heating systems and allow you to save energy. The most advanced models are controlled wirelessly, directly from a smartphone.

Coolant temperature

Water pumps for heating a private home differ in their operating temperature range. Some models can withstand heating up to +130-140 degrees, these are the ones that should be preferred - they can cope with any thermal loads.

As practice shows, operation at the maximum temperature is possible only for a very short time, so having a solid reserve will be a plus.

Other characteristics

When choosing a water pump for heating, you need to pay attention to the maximum operating pressure for the selected model, installation length (130 or 180 mm), type of connection (flange or coupling), and the presence of an automatic air vent. Also pay attention to the brand - under no circumstances buy cheap models from little-known developers. The water pump is not a part you should skimp on.

Connecting the circulation pump to the heating system

Installing a circulation pump in the heating system of a private house begins with choosing its location. You need to decide where to make the tie-in - in the supply or in the return. The last option is the most common. In open-type systems, it can also be installed on the supply pipe, but only immediately after the boiler, before the expansion tank.

Also, the installation rules state that there should be no vacuum in the boiler heat exchanger - it is created by water pumps. Therefore, the optimal placement location is the return pipe, not the supply pipe.

Placing water heating pumps for a home in the return pipe has a very important advantage - the temperature of the coolant in this area is lower, which ensures good cooling of the electric pump. In the supply pipe it will operate at a temperature close to the maximum value, and this is already minutes.

In the case of heated floors, the pump is mounted in a distribution cabinet. When using several circuits, water pumps are mounted as far as possible from the boiler, behind the hydraulic arrow - one pump for each direction. Placement on the supply pipe is also possible if the circuit does not branch, but it is too long - in this case the electric pump is placed away from the heating boiler.

Proper installation of an additional pump ensures that it is powered and turned on separately from other pumps in the system.

Position of the water pump in space

We have already decided where to install the circulation pump for heating and have developed brief instructions - if the circuit does not branch, we place it on the return line. In the case of several circuits, the connection diagram will be different - we install a pump on the supply pipes in each direction.

Regardless of where the water pump for home heating will be installed, its rotor axis must be located strictly in a horizontal position. Along other axes its position can be arbitrary. But its electrical circuit should not be located at the bottom, for which there is a completely logical explanation - if the unit fails, the electrical circuit will be flooded with coolant, which will cause a short circuit.

Carrying out installation work

The water pump is installed in the heating system through a bypass. Take a look at its drawing and familiarize yourself with the main elements:

The bypass connection diagram is good because it allows you to switch from natural circulation to forced. It will also help you replace the water pump without stopping and draining the entire heating system.

The circulation pump (1) is the main “person” in the system;
Shut-off valves (3) – disconnect the pump from the heating;
Bypass valve (4) – ensures that the coolant moves only through the pump or along both channels;
Dirt filter (2) – provides coarse filtration from large mechanical contaminants.

Let's see how to connect a pump to a heating boiler and what is needed for this. First, we inspect the installation site to find free space to place the bypass. At the next stage, we assemble the bypass elements, prepare the taps, nuts, drains and dirt filter. We will also need a set of keys to connect individual units, and seals.

Let's start assembling the bypass - we form a section with a water pump, screwing a dirt filter and taps to it. Next, we proceed to inspect the section of the pipe where the insertion will take place. We cut out a piece for the bypass tap, take the area with the pump, and cut holes for it. Next, we weld all the elements and only then tighten all the threaded connections with wrenches - this cannot be done before welding.

You can also install a check valve on the heating pump - it will help prevent the coolant from moving in the wrong direction.

Having connected the water pump to a floor-standing or wall-mounted boiler, we proceed to electrical work - we connect electrical wires with power to the terminals. Here it is recommended to install a separate RCD, choosing a 1 or 2 kW sample.

The next step is to start the water pump. To do this, you need to fill it with water, removing air from it. The air plug is removed through a built-in bleeder or through a plug screw. We open all the taps, open the drain or unscrew the screw plug, wait until the air comes out and water flows. After this, we seal the system and try to start the water pump. If the device is noisy, it means that not all of the air plug has come out - partially unscrew the plug screw and keep the system open until the air bubbles disappear.

Next, all that remains is to adjust the shaft rotation speed so that the productivity is slightly less than normal. There is nothing wrong with installing a water pump in a heating system with your own hands - you just need to know how to work with tools. If problems arise, consult with specialists.

Video

Evgeniy Sedov

When your hands grow from the right place, life is more fun :)

Content

Many residents of the private sector are familiar with the phenomenon of cold batteries. This happens due to insufficient fluid pressure in the heating system. To solve the problem once and for all, you need to select a water pump for heating, which is installed in the water supply system next to the boiler. How to choose the right device? What characteristics should you pay attention to? What brands of goods are in great demand in the market?

What is a heating pump

Heating designs with a natural whirlpool or recirculating supply can be quite effective, but only when serving small areas. For private houses and apartments large area It is necessary to install a special device next to the boiler to force the movement of water through the system. A circulating pump is a technological device that operates in ring heating, continuously moving water through pipes. Its main task is to ensure continuous heat supply and water circulation in the system.

Circulation pump device

In a simplified version, the operating principle of such a technological device is based on the interaction of a motor and a rotor, which is immersed in a coolant. The motor provides a continuous supply of fluid, and the rotor helps convert kinetic energy into potential energy, thereby creating the required level of pressure in the system. However, in many ways, the high-quality and reliable operation of the circulation pump in the heating system depends on the type of device and its characteristics.

Species

Heating devices can be classified not only by brand name, but also by the characteristics and operating principle of the device. Thus, the types of circulating sediments are conventionally divided into only two types:

A dry type ejector is characterized by the fact that the rotor part of the device does not come into contact with water. Such a heating pump at the output provides an efficiency of up to 85%, but creates a fair amount of noise, which is why it is preferable to install the device in separate gas boiler houses.
Wet pumps are those devices in which the entire moving part is in constant contact with water. Warm liquid provides such technological devices with constant lubrication of parts and silent operation. The efficiency of circulation devices of the wet operating principle is only 50-65%, which is why it is preferable to install them in private homes.

Characteristics

To buy a circulation pump for heating, it is important to have a good understanding of its technical parameters. There are not too many characteristics that are worth focusing on. In fact, only two will be important for the common man:

Pressure is the hydraulic resistance of the system. The value is measured in meters and, as a rule, is set by the value of the highest point of the pipeline.
Productivity is a parameter showing how much liquid the device is capable of processing per unit of time. Productivity is measured in cubic meters per hour.

It is worth knowing that these concepts are inversely proportional. So the maximum power of the electric pump will be achieved at zero pipeline height, and the pressure at the same flow. Thanks to these basic characteristics, you can choose a model with optimal parameters for yourself. At the same time, the principle of choosing a device - the more productive, the better - is not suitable for achieving high performance. Purchasing an incorrectly selected unit will lead to a decrease in heat transfer and an increase in electricity consumption.

Marking

Before you finally select a pump for your heating system, you should familiarize yourself with and decipher the alphanumeric designations on the unit label. As a rule, the following characteristics are included in the marking of circulation pumps for heating systems:

The letters UP indicate the type of unit. In this case, circulation.
Then come the letters S/E, indicating the control method: step-by-step speed switching or smooth adjustment.
After the letter characteristics come the numerical ones. The first block indicates the internal diameter in millimeters of narrow pipes, the second part indicates the maximum pressure in decimeters.
The third numerical block is the millimeter value of the installation length. This indicator is important in case of insertion of the device.
In addition, different manufacturers may have specified Additional Information on the label: type of housing material, method of connection to pipes, power or class of electricity consumption.

How to calculate the power of a circulation pump for heating

In order for the pump for circulating water in the system to fully meet the requirements, before purchasing it is necessary to calculate the power for the motor. If a unit is supplied with a performance index that is too high, the water in the pipes will make noise. Less power will not provide adequate heat. Essentially, for the right choice pumping device, it is necessary to calculate two quantities:

engine performance;
supply pressure.

The operating power will come from the total thermal output of the heating system. Simply put, the device must pump such a volume of liquid that it is enough to meet the needs of all radiators in the house. To calculate this, it is necessary to know the exact resource requirement for complete heating of the building. For private houses with an area of 100 square meters, this value will be 10 kW. The calculation itself should be made according to the following scheme X = 3600U (a * b), where:

U – heat consumption for heating;
A – thermal conductivity of water = 4.187 kJ/kg;
B – temperature difference between the supply and return lines. As a rule, a value of 10-20 degrees is conventionally accepted.

Rules for installation in a heating system

In order for the water supply unit to serve for a long time and be convenient to maintain, a number of rules must be followed when inserting:

For ease of dismantling, ball valves must be installed on both sides of the unit.
To create a barrier to small mechanical particles, it is advisable to install a special filter in front of the device.
It is advisable to install an automatic or manual air valve at the top of the bypass, which will remove accumulated oxygen from the system.
Due to the fact that the installation of pumps in the heating system of different manufacturers has its own distinctive features, it is important to follow the installation direction indicated on the device body.
Install a pump for water circulation in the heating system wet type Always need to be horizontal to avoid damaging the electric motor during operation. In this case, the terminals of the unit should always point clearly upward.
Joints and threaded connections must be treated with sealants, and a gasket must be placed between the mating parts.

Buy a heating pump

How much a pump costs depends on the characteristics of the unit, power, as well as the country of origin or brand. The cheapest options are made in China, however, as practice shows, such devices are not the most reliable, although they are cheap. For trouble-free operation during the entire warranty period, it is better to buy pumps for circulation heating, time-tested - from well-known brands. The following product rating will help you decide on the model.

Belamos

On the Russian market, the industrial company Belamos is a leading manufacturer and supplier of high-quality heating equipment. The following model of surface circulation unit is especially popular among representatives:

Model name: Belamos BRS 25/4G.
Price: the average cost in Moscow and St. Petersburg is 1800-2100 rubles.
Characteristics: can withstand water heating up to 110 degrees, maximum pressure is 4.5 m, and throughput is 2.8 cubic meters of water per hour.
Pros: ability to install vertically/horizontally, reasonable price, quiet operation, good quality assemblies.
Cons: the control unit is not sealed, the nuts included are not of the best quality.

Not inferior in quality to its brother and wet pump Belamos of higher power:

Model name: Belamos BRS 32/8G (180mm).
Price: on Yandex Market from 4738 rubles.
Characteristics: pressure cold water– 8 m, permissible temperature +110/-10 degrees, W*H*D dimensions – 15*18*17 cm.
Pros: there is a speed control system, good nuts and cable are included, the impeller is made of polymer.
Cons: creates noise.

Dab

Sale of equipment from the Italian company DAB PUMPS on the territory Russian Federation has been carried out for more than 30 years. In addition, the company often holds promotions, thanks to which circulation systems of equipment can be purchased at a discount at very low prices. For example, you can often find the following model on sale:

Model name: household dab pump VA 35/180.
Price: buy from official representatives you can get it for 3334 rubles, if you order by mail the cost with delivery will be about 4000 rubles.
Characteristics: productivity - 3 cubic meters / hour, pressure -4.3 m, network voltage - 220-230 W.
Pros: there is overheating protection, three rotor speeds.
Cons: none identified.

Caliber

Among the inexpensive and trustworthy Chinese products, you can highlight heating equipment from the Caliber company. Among the wide range of units, the following device can be distinguished:

Model name: pump caliber NTs – 90/B.
Price: on Yandex Market from 2304 rubles.
Characteristics: pressure max. – 6 m, power consumption – 90 W, throughput – 2.4 cubic meters/hour.
Pros: reasonable price, economical energy consumption, ease of maintenance and installation.
Cons: when the lights are turned off, it completely blocks the heating system.

Aquario

The international company Aquario will create competition for any of the above products. Among the wide assortment, it is difficult to choose models that stand out, but according to consumer reviews, the following deserve special attention:

Model name: Aquario AC 159-160A.
Price: 3200 rubles when purchased in online stores; when purchased in bulk on the official website, the price will be reduced.
Characteristics: develops pressure up to 9 meters, runs on electricity with a power of 120 W, can process up to 1.75 cubic meters of liquid in an hour.
Pros: there is the ability to artificially increase pressure, high performance, service life from 5 to 10 years.
Cons: none identified.

Buyers also did not miss another Aquario model with more powerful performance:

Model name: Aquario AC 1512-195A.
Price: when ordering online 4582 rubles without delivery.
Characteristics: develops pressure inside the system up to 12 m, maximum throughput – 2.79 cubic meters, consumes power up to 270 W.
Pros: suitable for installation in any position, the motor runs silently.
Cons: overpriced with average performance.

Calpeda

The largest Italian concern for the production of pumping and heating equipment presents to your attention the following products:

Model name: Calpeda NCE 32-60/180.
Price: 6316 rubles on the olx website.
Characteristics: maximum pressure force - 5 m, throughput - 4 cubic meters per hour of operation, withstands temperatures up to 95 degrees.
Pros: there is protection against overheating, the product belongs to the energy-saving class with marking A.
Cons: slightly noisy during operation.

In addition, it is worth paying attention to a similar one produced by Calpeda, the body and internal parts of which are made of high-quality materials:

Model name: Calpeda NC3 32-70/180.
Price: 7354 rubles.
Characteristics: throughput 4.5 cubic meters in 60 minutes, maximum liquid pressure – 70 meters, power consumption – 136 W.
Pros: there is the possibility of installation in a water supply system, high-quality performance.
Cons: high cost, can only be mounted in a vertical position.

Octopus

The BAPHA company presents a diverse line of circulation pumping stations, among which the following stands out especially clearly:

Model name: Octopus GPD 25-4S-180.
Price: from 5500 to 6000 rubles.
Characteristics: mains operation with a power of 160 W, output water pressure of 3.5 meters, throughput per hour of 3 cubic meters of liquid.
Pros: quiet engine operation, low overall weight.
Cons: difficult to find on sale, only available for horizontal orientation.

In addition, it is worth paying attention to a similar product from the same company:

Model name: SPRUT GPD 32-8S-180.
Price: from 8000 to 9000 rubles.
Characteristics: output water pressure is 7.3 meters, throughput per hour is 10 cubic meters.
Pros: ability to choose the installation method, high performance, quick heating of the room.
Cons: apart from the high cost, no other disadvantages have been identified.

Wester

Wester circulation units are characterized by a long service life, quiet operation and good quality parts:

Model name: Wester WCP 25-40G.
Price: 2127 rubles.
Characteristics: a surface heating pump passes up to 2.5 cubic meters of liquid, creating a maximum permissible pressure in the system of up to 4 meters.
Pros: installation in any position is available, the engine runs almost silently.
Cons: Expensive compared to competitors.

Another model from the same company differs in its ability to create higher pressure inside the heating system:

Model name: Wester WCP 15-90.
Price: 3041 rubles.
Characteristics: liquid throughput up to 1.5 cubic meters per hour, pressure – 9 meters, withstands temperatures up to 60 degrees.
Pros: there is a pressure boost function.
Cons: Vertical installation only.

Grundfos

Devices from Grundfos, popularly known under the nickname "Grundik", are distinguished by high performance, long service life and quality:

Model name: Grundfos UPS 32-80 180.
Price: you can buy a heating pump in a private house for 20,983 rubles.
Characteristics: can create resistance up to 7.5 meters, has a throughput per hour of 11 cubic meters, the declared motor power is 135 W.
Pros: ability to choose installation method, good quality, quiet operation, long service life.
Cons: high cost.

Another good unit from the same company will surprise you with its efficiency in operation, without creating extraneous noise:

Model name: heating pump Grundfos ALPHA2 25-40 180.

Price: approximately 7615 rubles.
Characteristics: the device produces a pressure of up to 4 meters, has the ability to pass up to 2.4 cubic meters of liquid per hour, consumes 22 W of power.
Pros: there is automatic control of the water level in the system, a night mode function and a front control panel.
Cons: none identified.

Heating pump Wilo

This heating device from the famous brand Vilo also has no worse parameters than its competitors:

Model name: Wilo Star-RS 25/4.
Price: 4087 rubles.
Characteristics: a pump with a wet rotor produces up to 4 meters of pressure and pumps up to 3 cubic meters of water per hour of operation, the power declared by the seller is 22 W.
Pros: there is a speed regulator, instructions.
Cons: the design has only vertical mounting.

A small wilo heating pump will perfectly cope with the task in a small house or apartment:

Model name: Wilo Star-Z Nova.
Price: you can choose and purchase through the website for 5,759 rubles.
Characteristics: creates pressure in the system up to 0.84 meters, and passes up to 0.36 cubic meters of water per hour of operation.
Pros: helps save on electricity, heats well in small spaces, operates silently.
Cons: high cost, only vertical connection method.

How to choose a heating pump

To make the right decision, the selection of a circulation pump must take into account the following requirements and rules:

The unit must fully comply with the received power calculations. You need to calculate the performance in advance or ask the heating adjuster about it. Under no circumstances should you buy a product at random.
In order for the pump to produce the pressure declared by the manufacturer, you need to select a device based on your pipe diameter. The larger the diameter, the more powerful it is worth buying the device.
It is worth taking into account external weather conditions. If pumping station will be located in a separate room, there is a high probability that the unit will freeze.