Selection of a pump for heating a private house: calculation of the parameters and the choice of equipment

For comfort and efficiency when heating your home, selecting the right pump is essential. Whether you’re installing a new system or upgrading your old one, knowing how to determine the required specifications and choose the right tools is crucial. We’ll take you step-by-step through the procedure in this guide, so you can choose your heating system with greater ease.

Priority one should be given to comprehending the function of a pump in a heating system. The pump is in charge of moving hot water throughout your home from the boiler or other heat source to the radiators or underfloor heating system. Your heating system won’t be able to distribute heat efficiently without a pump that is the right size and operating, which can result in cold spots and inefficiencies.

There is no one size fits all solution when it comes to choosing the correct pump. Your home’s size, the design of your heating system, the kind of radiators or underfloor heating you have, and even the local climate will all affect the size and kind of pump you require. This is the reason it’s critical to determine the precise parameters that apply to your circumstances.

In order to calculate the parameters, you must first determine your home’s heat load, which is based on a number of variables including your house’s size, insulation levels, number and size of windows, and climate zone. You can calculate the flow rate and head pressure needed for your pump to effectively circulate hot water throughout your house by precisely calculating the heat load.

You can start selecting the ideal pump for your heating system once you have determined the essential parameters. Energy-efficient models, variable-speed pumps, and circulating pumps are among the different kinds of pumps that are available. When making your decision, it’s critical to take into account aspects like energy efficiency, dependability, noise levels, and maintenance needs.

In conclusion, choosing the best pump for heating your home requires careful parameter calculation and consideration of a number of factors. You can make sure that your heating system runs smoothly and effectively, keeping your house warm and cozy all year round, by learning about the function of the pump in your heating system, evaluating the particular needs of your house, and looking into your options.

Parameters to Consider	Explanation
House Size	Determine the square footage of your house to calculate the necessary heating capacity.
Insulation Quality	Assess the level of insulation in your home, as better insulation may require less heating power.
Climate	Consider your local climate conditions to determine the heating load your house will face.
Heating System Type	Choose between radiant floor heating, baseboard heaters, or radiators, as each may require a different pump.
Flow Rate	Calculate the required flow rate based on the heating system"s specifications and the size of your house.
Head Pressure	Determine the vertical distance and frictional losses in your heating system to select a pump with sufficient head pressure.
Energy Efficiency	Look for pumps with high Energy Efficiency Ratio (EER) or Seasonal Energy Efficiency Ratio (SEER) ratings to save on energy costs.
Budget	Consider the upfront cost of the pump along with long-term energy savings to find the best value for your budget.

Why are the calculations of the pumping pump pump

Centrifugal pumps are a common feature of modern autonomous heating systems that are used to regulate temperature in residential buildings. They allow the liquid in the heating circuit to circulate continuously.

The temperature of the water at the heating boiler’s output can be lowered by raising system pressure, which will lower the amount of gas the boiler uses on a daily basis.

When the circulation pump model is chosen carefully, it becomes possible to raise the equipment’s efficiency during the heating season and maintain a comfortable temperature throughout the building.

What are the views

One of the key components in contemporary systems that guarantees consistent coolant flow and, consequently, uniform heating of all heat-generating components is the heating pump.

These units come with a list of benefits that are as follows:

1. Contribute to maintaining a constant temperature of the coolant.
2. Low level of electricity consumption.
3. High reliability when working.
4. Simplicity of use.

Their primary duty is to balance the pipe wiring resistance in the heating substance’s duct.

Circular pumps can be implemented constructively in two basic ways:

• with a dry rotor;
• With a wet rotor.

A sealed partition divides the electric motor from the device’s working chamber, which has a dry rotor. These units typically operate with greater power and performance, but because of their noise emissions, their use is restricted to solitary rooms or buildings.

Wet rotor pumps function in the coolant, extending their service life. They are low-sophisticated for the same reason, which permits their use in serviced buildings.

Although their low efficiency makes them unsuitable for large heating systems, their low sophistication and durability make them very popular in small private homes. This is a major drawback of such units.

It should be mentioned that considering only their positive and negative traits is not the selection criteria. Selecting a heating circulation pump necessitates calculating it based on multiple factors.

Types of devices

The market offers a sizable assortment of circulation pumps. How should a heating pump be selected? Wet and dry rotor circulation pumps are the most widely used types of pumps.

2.1 mechanism with wet rotor

A working wheel and rotor are submerged in coolant in a device with a wet rotor. This prevents the device from overheating by aiding in the cooling of the pump engine. The materials used to make these details are resistant to corrosion.

Features of certain circulation pump models

Because they are inefficient, there aren’t many of these kinds of devices. Benefits of this species:

• low noise;
• availability;
• does not need regular maintenance.

Small homes are heated by devices with wet rotors. In situations where the volume of liquid in the system is small, you can select a circulation pump for heating this type due to the pump’s modest power.

2.2 device with a dry rotor

This kind of device has an impeller submerged in the coolant, and sealed gaskets shield the rotor from the liquid.

The high power of the pump will be advantageous when choosing it for this kind of heating system. It is utilized in rooms with a lot of space because of this. The efficiency of the device is fairly high.

But there are drawbacks to a pump with a dry rotor as well:

• vibration and noise level are quite high;
• As a result of rapid use of lubrication, it needs regular service.

What to focus on when choosing a pump?

The hydraulic properties of a country home’s heating system must be taken into consideration when choosing a pump for autonomous heating. As a result, you must determine the ideal level of heat before heading to the store in order to keep the rooms at a comfortable temperature.

Completing the hydraulic calculation with competence will require you to become familiar with additional information. Alternatively, you could seek the counsel of a qualified expert.

Numerous factors affect how hot an object should be at its ideal temperature:

• material used for the construction and insulation of walls;
• climatic conditions;
• features of ceilings and floors;
• the presence of thermostatic valves;
• characteristics of double -glazed windows installed in the cottage.

A pump’s range, number of speeds, and noise level should all be carefully considered when selecting one for autonomous heating. The equipment’s manufacturer and cost also had a significant impact.

It is important to consider the technical aspects of the device you select for forced circulation in the heating system to prevent the pump from operating inefficiently or beyond its capacity.

Criterion #1 – Scope of equipment

Experts typically recommend installing heating pumps, which have rotors completely submerged in a heat-producing medium. After all, units are handling a high load more successfully in addition to this kind of low noise level.

Because of this, the system that has "wet" equipment will last longer, be simpler to maintain, and require less care.

The models with the ceramic shaft and robust steel and bearings should be given priority in production. Their service life, which is at least 20 years, is an advantage.

A cast-iron circulation pump is something you should not purchase. After all, a gadget like that will eventually break and need to be replaced.

In the event that a "wet" type heating pump was selected, keep in mind that it should not be installed in an open-type cottage heating system. Indeed, the heated water used in this instance to lubricate the mechanism is contaminated in many ways.

For instance, sand particles may clog the passageway between the stator and rotor, causing the pump to break down soon.

Regarding open systems, this kind of equipment can operate there for many years. It won’t require any specialist maintenance either.

Criterion #2 – calculation of optimal power

One can compute the efficiency of the pump intended for use in the heating system on its own. The entire pipeline’s length, which determines how far the equipment must pump coolant, is needed to accomplish this.

We extract 0.6 meters of the device’s pressure for every 10 meters. Therefore, a pump with a pressure of 4.2 meters will be required for a small house with a heating circuit length of 70 meters.

Alternatively, you can use the following formula to calculate this indicator:

• R is the need for a heat;
• TF and TR show the temperature of the coolant when supplied to the system and at its output, respectively. In this case, the values in the degrees of Celsius are used.

Two values are commonly used as the R parameter in European countries: 100 W/m2 for houses with one or two apartments and 70 W/m2 for apartment buildings.

The circulation pump’s ideal power can be determined in a variety of ways, the above method being just one of them. An expert specialist is the only one who can carry out the most precise computations.

Using special tables is advised when calculations need to be done with the least amount of error possible. They provide ideal values for specific homes and apartments.

Criterion #3 – the number of speeds and the noise of the pump

The ability to configure modern pump models is their primary feature. By changing the unit’s speed, you can modify the power.

The most popular models as of right now have three speeds. This enables you to save electricity while saving time and energy by heating the living area as quickly as possible and, in the case of warming, reducing the device’s productivity.

The best option if you need to purchase equipment with the least amount of noise produced is a "wet" pump.

If the unit is installed with a "dry" rotor, there will be an additional sound produced while it operates. This sound is caused by the fan cooling the electric engine rotating. As a result, it is best to install such a device in a different room, and residential customers should opt for a quieter option.

The main factor driving "wet" pumps’ popularity is their low noise level.

It’s not always the case that an unrelated noise made during startup signals a problem. This is frequently caused by the air that was still in the heating system. It is advised to use special valves to lower the air before launch in order to solve this issue.

Criterion #4 – manufacturer and equipment price

You can begin using circulation pumps to view the catalog after all the necessary calculations have been completed. It is preferable to place an order through websites with carefully considered product filtration systems. This will find models with ideal characteristics very quickly.

There is a wide variety of heating system pumps available on the market today. Numerous producers claim that their goods are dependable, high-quality, and long-lasting. However, the stated and actual characteristics don’t always match. Ordering equipment from manufacturers who have identified themselves to the world is therefore preferable.

The following brands ought to be on the roster of reputable companies that release pumps for heating systems:

• Halm;
• Wilo;
• Ebara;
• DAB;
• Alfastar;
• Pedrolo;
• Grundfos.

The power, kind, and brand of the pump all affect how much it costs to set up forced coolant pumping. Generally speaking, equipment costs fall between $60 and $220. We advise you to become acquainted with the top twelve heating pumps as rated by users.

Regarding domestic manufacturers, they only provide models intended for use in the industrial sector; they do not produce equipment for domestic use.

Circulation pumps are typically manufactured in series with averaged parameters, which presents challenges when selecting equipment. In this instance, it is preferable to give a multimode device priority.

Selection of the pump according to its main characteristics

The primary technical attributes of any heating pump are:

Both the system’s power and the hydraulic resistance it experiences during coolant circulation must match for these parameters to effectively provide enough coolant circulation for the transfer of thermal energy from the boiler to the radiators. Therefore, you need to be aware of both of these values in order to choose the right pump for the heating system.

The precise computations that specialists employ are fairly large and intricate. Consequently, independent selection enables you to select the ideal circulation pump characteristics through the use of streamlined computations utilizing the above-mentioned basic formulas and suggested average indicators. Furthermore, nearly anybody can perform these computations.

Three options for calculating thermal power

Determining the thermal power (R) indicator can be challenging, so it is preferable to concentrate on widely recognized guidelines.

Choice 1. It is customary in European nations to consider the following indicators:

• 100 W/m.sq. – for private houses of small area;
• 70 W/m.sq. – for high -rise buildings;
• 30-50 W/m.sq. – for industrial and well -insulated residential premises.

Option 2: Areas with mild climates are ideally suited for European standards. Nonetheless, it is preferable to concentrate on the SNiP 2.04.07-86 "Heating networks" norms in the northern regions that experience severe frosts, as they account for outside temperatures as low as -30 degrees Celsius:

• 173-177 W/m.sq. – for small buildings, the number of storeys of which does not exceed two;
• 97-101 W/m.sq. -for houses from 3-4 floors.

Option 3: Using the table below, you can calculate the required thermal power on your own while accounting for the building’s purpose, level of wear, and thermal insulation.

Table: Guidance for calculating the required thermal power

How to determine the power of the heating system and the required supply of the pump

The quantity of heat required for a comfortable home is directly correlated with the size of the house and the thermal insulation qualities of the materials used to construct its walls, roof, floor, and doors. This determines the required thermal power of the heating system. Calculating the house’s dimensions or its heated area is not difficult. There are adequate calculators and roulette tables.

Precisely calculating heat loss through external structures is more challenging because material, thickness, and design considerations must be made. As a result, for a more straightforward computation, you can utilize the suggested average indicators of 1-1.5 kW of thermal power per 10 m^ of heated space with a maximum ceiling height of 3 m. Use less value if the room is well-insulated; use more value if it is not well-insulated or not enough.

For instance, 12 kW of thermal power would be roughly required for a 120 m2 well-insulated house. The installed boiler’s power can be considered when choosing a circulation pump for an existing heating system that uses natural circulation.

Calculation of the required pump performance

Once the thermal heating power has been determined, you can calculate the circulation pump’s supply (performance). There are two easy formulas you can use to do this. p = q/(1.16 x δt), (kg/h or l/h), is the first of them.

• Q – previously calculated thermal heating power (W);
• Δt – the difference between the temperature of the supply pipe and “return”, which for ordinary systems, usually within 20 O C, and for warm floors – about 5 O;
• 1.16 – coefficient taking into account the specific heat of water, W × h /kg × o C (for other coolants (antifreeze, oil), it will be slightly different and, if necessary, it can be found in the reference literature or on the Internet).

An alternative formula is: n = 3.6 x q/(c × δt), (l/h), where C is the coolant’s heat capacity (4.2 kJ/kg × ° C for water). Any of these formulas can be used to calculate the need for a pump with the following performance (supply), for instance, in a 12 kW two-pipe system: P is equivalent to 12000/(1.16 × 20) = 517 l/h or 0.5 m3/h.

Calculation of the required pressure to overcome hydraulic resistance

The pressure (pressure) that the circulation pump needs to create in order to overcome the current hydraulic resistance must be determined in addition to its performance when choosing the pump for the heating system. However, you must first determine how strong this resistance is. You can use the following formula for a simplified calculation: j = (f+r × l)/p × g (m), where:

• L is the length of the trunk of the pipes to the most remote radiator (m);
• R is the specific hydraulic resistance of the line of the straight pipe (PA/m);
• P is the density of the coolant (for water – 1000 kg/m3);
• F – an increase in resistance in connective and shut -off valves (PA);
• G – 9.8 m/s 2 (acceleration of free fall).

Reference literature contains the precise values of R and F for various pipes, connecting, and shut-off valve types. You can use the average data of these values, which were discovered through experimentation, for our condensed calculation: R-100-150 PA/m (the resistance decreases with pipe diameter and smoother inner surface); F can be chosen based on the type of reinforcement:

• Additionally up to 30% of losses in a straight pipe – for each connecting fitting in this area;
• up to 20% – for a three -way mixer or similar devices;
• up to 70% – for the regulator.

Alternatively, you can utilize the following formula, which was suggested by the experts of the renowned pump manufacturer Wilo: j = r × l × k, m, where k is the coefficient and accounts for the rise in resistance in shut-off and regulatory valves:

• 1.3 – simple heating systems with a minimum number of reinforcement;
• 2.2 – in the presence of regulatory reinforcement;
• 2.6 – for complex systems.

Remember that if a single pump is intended to supply circulation in a system with two or more wiring contours (branches), then consideration should be given to their overall resistance when determining the pump’s pressure. The thermal power and resistance of each circuit must be calculated independently if there is a separate pump installed in each one. When determining the pressure, the building’s storey count is not very important. Because the "Reetoles" pillar balances the fluid column in the feeding line in a closed heating system.

The number of circulation pump speeds

The majority of contemporary circulation pump models have a speed adjustment feature. These are typically three-speed models that let you control how much heat enters the space. In order to maintain a comfortable air temperature in the rooms, the pump’s speed is adjusted to increase during sharp cooling and decrease during warming.

A unique lever located on the device casing is used to change the speeds. Popular circulation pump models are those that have an automated system that adjusts the pump’s speed based on variations in the outside temperature.

It should be noted that this is only one of the options for this kind of calculation. Some manufacturers use a slightly different calculation method when selecting the pump. You can ask to complete all the calculations of a qualified specialist, telling him the details of the device of a particular heating system and describing the conditions of its operation. Typically, the indicators of the maximum load are calculated at which the system will work. In real conditions, the load on the equipment will be lower, so you can safely purchase a circulation pump, the characteristics of which are slightly lower than the calculated indicators. The acquisition of a more powerful pump is not advisable, as this will lead to unnecessary expenses, but the operation of the system will not improve.

Once you have all the information you need, you should examine each model’s pressure and expense characteristics while accounting for varying speeds. These attributes can be shown as a graph. An example of such a graph with the device’s calculation characteristics noted is shown below.

By using this schedule, you can select the appropriate heating circulation pump model based on indicators determined specifically for a given private home’s system.

Point B shows the actual data for a specific pump model, as near to theoretical calculations as possible, while Point A corresponds to the required indicators. The more appropriate the pump model is for a given set of operating conditions, the closer the distance is between points A and B.

Performance calculations

You must select the pump’s features correctly for it to operate effectively. It is preferable to speak with an expert before making a purchase if you are unsure of the information. The simplest method for determining performance is to use the following formula:

• G is the volume of the necessary coolant, l/h
• Q – the general load on heating, WT. To facilitate calculations, it is better to take a ratio of 1000 watts per 10 m².
• Δt – the difference between the temperature of the water at the exit from the boiler and when returning to it. In calculations, it is usually taken equal to 20 ° C.

For instance, you have to select a pump for a 100 m² country home. Ten thousand watts will be needed to heat it. In this instance, the computation will appear as follows: 430 l/h = 0.43 m³/h = g = 0.86×10000/20

A pump with a total capacity of 430 liters, or 0.43 m3/h, is required.

Calculation of working pressure in the circuit

The indicator’s pressure inside the pipeline must be taken into account when calculating the circulation pump for the heating system. Using the ratio, you can accomplish this:

P is equal to (rx l + z) / px q, where

1. P is the magnitude of the pressure;
2. R – stream resistance for straight sections of the pipeline;
3. L – total length
4. Z is the value of the stream resistance due to the fittings used in the system, cranes and other reinforcement;
5. P is the value of the density of the coolant at operating temperature;
6. Q is the value of the acceleration of free fall.

If the provided formula cannot be used due to insufficient data, you can use the simplified ratio:

P is equal to r x l x zf.

R is the flow resistance in the straight section of the pipe, which is roughly 100 to 150 pasquals per meter; if the resistance is stated in a way that makes calculation easier, the value will be 0.01 to 0.015 meters per meter of pipe section;

L is the pipeline’s overall length; in a two-pipe circuit, both the straight and reverse circuits are considered;

ZF is an increase coefficient that is based on the subsequent metrics:

• for a system with ball cranes, for which the lumen of the pipeline is unusual, and with correctly selected fittings, it is accepted equal to 1.3;
• When using throttle or thermoregulating devices, its value will be 1.7.

The selection of the circular pump for the heating system necessitates the computation of its characteristics.

Crucial! In order to prevent the device from operating in maximum modes, the calculated value for each indicator needs to be increased by 15% to 20%. He will be shielded from overload and early failure thanks to this.

It is possible to choose circulation pumps without computing the required parameters because of their common use. The table provides suggested parameters.

Empiric selection of pumps

Heated area (m 2)	Performance (m 3 /hour)	Brands
80 – 240	From 0.5 to 2.5	25 – 40
100 – 265	Is the same	32 – 40
140 – 270	From 0.5 to 2.7	25 – 60
165 – 310	Is the same	32 – 60

Note: The diameter of the pipes is indicated by the first digit in the third column, and the lifting height by the second.

By utilizing the data, selecting the appropriate device for long-term and sustainable operation can be done with ease.

To ensure effective and efficient heating in your private home, there are a few important considerations to make when selecting a pump. It is essential to comprehend how parameters are calculated. Your decision is influenced by various factors, such as the size of your home, the kind of heating system you have, and the distance the pump must travel to move hot water. To match the pump’s capacity to your heating requirements, it is crucial to precisely calculate the flow rate and pressure requirements. To reduce operating expenses and the impact on the environment, take the pump’s energy efficiency into consideration as well. By carefully weighing these variables, you can choose the best pump for your home’s heating needs and comfort level.

Grundfos, Pilled or Chinese?

The German brands Grundfos and Wilo, along with the Italian gadgets made by DAB, are arguably the most well-known circulation pump brands in Russia. However, a plethora of Chinese-made pumps have recently surfaced, and they are significantly less expensive than well-known brands. Of course, German quality is well-known worldwide, but you must realize that you are paying a portion of the brand’s cost when you purchase a Grundfos pump. However, the Chinese-made circulation pump, which was manufactured using European machinery, is on par with its European equivalents in terms of quality. It is well known that a portion of Wilo pumps are made in the same Chinese factory.

However, there are instances when a manufacturer’s desire to cut costs may result in a product that is as low-quality as possible. For instance, the electric motor winding in the majority of low-cost Chinese circulation pump models is made of aluminum wire rather than copper. This shortens the equipment’s useful life.

The bottom line is that while you can buy Chinese pumps, you should avoid doing so if you see a pump that seems unusually cheap.

How to calculate the circulation pump of heating from the boiler power

Frequently, the boiler is purchased first, and the remaining components of the system are chosen subsequently, with an emphasis on the heating device’s declared power as stated by the manufacturer. In order to guarantee the potential of quickening the coolant’s flow, modern heating systems with natural circulation frequently purchase circulation pumps.

The formula Q = n/(t2-T1) is used if the boiler’s power is known.

Q is the pump’s usage measured in m.cube/h;

N is the boiler’s power in Tuesday.

T2 is the water temperature in degrees Celsius at the boiler’s output, or the system’s entrance;

Technical specifications

Three indicators comprise the primary ones:

Technical documentation for the pump reflects these parameters, so it’s critical to accurately interpret them and perform the required calculations.

Classification

Line of circulation pumps in Photo 1

The structure of the entire heating system pump line is the same. The primary distinction is the rotor operation principle, which has an impact on the system’s functionality and quality of work. Thus, two primary groups are identified:

The type of rotor determines the type of circulation pump: one that is in contact with the coolant (wet) and one that is not (dry).

The rotor is said to be totally isolated from the coolant according to the dry principle of operation. These kinds of pumps fall into the category of industrial samples, which are stronger but also noisier.

When selecting such equipment, a separate, isolated room must be provided.

The presence of clamping ceramic rings to protect the electric motor is the primary distinction between the "wet" and "dry" rotors. The smallest possible layer of water serves as a lubricant, and the rings are composed of stainless steel. The rings are tightly fitted to one another to create a spring, which gets compressed more force as the elements deteriorate and tightens the rings.

The "wet" type of rotor allows the rotor to be placed directly in the coolant, and a unique hermetic metal glass ensures that the electric motor is consistently shielded from moisture infiltration.

Although this kind of pump is nearly silent, its low efficiency should be sufficient to heat even large homes if the right equipment is chosen.

The following can be listed as some of the primary benefits of such equipment:

• compact dimensions;
• Absolutely silent work;
• The lack of the need for maintenance due to the fact that the coolant itself acts as a cooling element and at the same time lubricant.

Calculation of the power of the pump with forced circulation

There are multiple methods for figuring out the pump’s power for a given heating system.

A specialist should perform the calculations and draw up the calculations based on different parameters. They will accurately determine the required power and provide recommendations for the type of boiler.

Compliance of SNiP

It goes without saying that there are standard parameters that must be met in order to determine how much heat is appropriate for a given area. Boilers and pumps are installed in multistory buildings, production facilities, and public buildings based on these parameters.

Sanitary regulations governing the provision of warmth in residential buildings must also be followed; this information can be used to estimate the pump’s power.

Therefore, the next amount of heat should be released in accordance with SNiP 2.04.07-86 per square meter of space at an outside temperature of -25 to 30 0 C.

Specifications of the object (floor count)

It suffices to adjust the room’s overall area to the matching indicator in order to calculate the necessary amount.

When selecting a universal pump, this type of calculation is warranted since the pump’s automatic control system verifies the features of the design and configures the functionalities.

Photo 2: Undone thermal power table for different rooms

Calculation of the operating capacity according to the heating system

Determining the circulation pump’s power based on the boiler’s features and capacities is far more effective. The following formula ought to serve as a guide in this situation:

• N is the calculated power of the pump;
• NK – the power of boiler equipment;
• T1-T2-temperature difference in the opposite and supply contours. As a rule, this indicator is up to 15 0 s.

The power calculation is also impacted by the hydraulic resistance in the pipeline, so the corresponding coefficient—a decreasing or increasing initial value—is applied. The coolant’s primary resistance is found in the pipe’s indirect sections or in connecting parts.

For example, hydraulic resistance can reach 1.5 cm/m even in a straight section of the pipe. You can use the following indicators to independently calculate the resistance throughout the pipeline based on this indicator:

• Fiting – 30%
• Court reinforcement, various cranes – 70%
• Three -way mixer – 20%
• turns, bounces – 10%

The increase in resistance is independent of the building’s condition. The principle of communicating vessels, which states that there are two pillars with an equal amount of liquid in the system, governs how coolant moves through the pipes.

Video 1: Diameters, pump, and heating calculation

Only when the entire heating system is installed in the customer’s presence or when a trigger scheme for pipe wiring is in place can the total resistance be computed. Based on the total area of the room, it is preferable to use the universal type of pump if such a scheme is absent or if a portion of the pipeline is hidden.

Following the completion of the necessary computations, you are able to select a pump from a catalog that is provided by each equipment manufacturer. At the same time, take note of the fact that the heating system’s maximum load calculation always indicates all of the technical parameters of the circulation pumps. The unit whose power is an order of magnitude less is the one you should select. In this scenario, savings on acquisition, ongoing upkeep, and electricity costs will all be achievable.

The circulation pump’s working parameter, like that of any other piece of equipment, is consistently less than the estimated value.

How to choose a circulation pump according to the received data

Having completed the calculations and determining the main parameters (feed and pressure), let"s proceed to the selection of a suitable circulation pump. To do this, use the graphs of their technical characteristics (B) that can be found in the passport or operating instructions. Such a graph should have two axes with pressure values (usually in m) and feed (performance) in m3/h, l/h or l/s. We apply the data obtained during the calculation, in the corresponding dimension and at their intersection we find point (a). If it is located above the pump characteristics schedule (A3), then this model is not suitable for us. If the point falls on the schedule (A2) or will be below it (A1), then this is a suitable option. But it must be borne in mind that if the point is much lower than the graphics (A1), this means that the pump will have excessive power supply, which is also inappropriate, since it will consume more electricity and its cost will also be higher than the models, the characteristics schedule which will be as close as possible to our point.

Certain pump models feature two or three speeds instead of just one. Their characteristic graphs will have multiple lines, but only two or three, in each case. In this situation, choosing the pump needs to be done based on the schedule for the speed that will be utilized, or, if all speeds are being used, taking into account all of the lines.

Manufacturers and prices

Unlike the water supply and sewage systems, the primary system in a private home is the heating system, and when it breaks down during the winter or defrosts, it can cause substantial financial damage. You will need to purchase a new device right away, which is not always possible in rural deaf areas, even if the owners are home and the circular is broken. Additionally, high-quality heating pumping equipment saves energy and improves living comfort; for this reason, it is preferable to select models from reputable manufacturers rather than the aforementioned Chinese knockoffs.

German manufacturer Wilo is well-known for offering a large selection of household circular circular circular RS, Stratos, Smart, and Top models. Each modification comes with the following features:

• Are produced in accordance with the European ENEV energy conservation directive for heating circuits with a thermal capacity of more than 25 kW, according to which only automatic regulation of pumping equipment and the presence of at least 3 stages of adjustment of electricity consumption are allowed.
• Designed for European AC voltage of 230/400 V with acceptable deviations of 10%.
• The housings are mainly made of cast iron.
• The power of the units, depending on the pressure and volumetric characteristics, lies in the range from 40 to 200 watts., The previously selected electric pump for a single -inch pipe Wilo – Star RS 256 has a capacity of 99 W.
• The cost of circular electric pumps Wilo ranges from 50 to 100 in.e.

14. Rice. 14. Choosing a heating system circulation pump from well-known manufacturers Grundfos, Wilo, and Dab

Famous Danish pump manufacturer Grundfos is available on the market with models UP, UPS, UPSD, Solar, and their more recent Alpha2 equivalents, which come with the following features:

• The cases are made of cast iron, brass and stainless steel (marked by Litera N).
• UPS models are equipped with 3 speed speeds, in Alpha2 the frequency is automatically regulated.
• A wide range of powerful models with a feed volume of up to 15 m is presented./ Cub. and pressure up to 15 m.
• The cost of electric pumps Grundfos is 70 – 100 at.e., The price of powerful devices can reach 500 at.e.

When comparing the power consumption of Wilo and Grundfos units, the Grundfos UPS 25-60 180, which has a 60 watt capacity, uses 1.5 times less electricity than the Wilo Star RS 256 device that was previously under consideration. Furthermore, the maximum feed volume that Grundfos can handle is 4.35 m.cube/h. Opposed to 3.5 m.cube./h. Wilo.

The well-known Italian manufacturer DAB provides the A and VA series of household circular pumps to the market. These pumps stand out for the following reasons:

• The presence of 3 rotation speeds in single-phase models and built-in protection against overload.
• The operating temperature of the coolant is from -10 to +110 s.
• For household use, the VA line is most suitable, the maximum performance of which is 3.5 m.cube. h. and maximum pressure 6.5 m. (Series A has the corresponding maximum indicators of 16 m.cube.h. and 11 m.).

The circular DAB VA 35/180 model, which has a maximum performance of 3 m cube/h and a pressure of 4.3 m, is the most cost-effective option when it comes to price and quality ratio. It costs approximately 60 at.e., which is 40 at.e. less than Grundfos and Wilo.

15 DAB parameters for rice

The number of circulation pump speeds

Pump speed is the device’s capacity to alter performance. It’s easy to determine whether modes are available because the description will list multiple powers, typically three.

Similarly, in all three versions, speed and performance both signify the same thing. For instance: 4/3/2 m of pressure, 2200/1900/1450 rpm of rotation speed, and 70/50/35 W of power.

Certain models have the ability to automatically adjust their work speed and, consequently, their performance based on the outside temperature.

The pump housing has a unique switch for changing the mode. It is recommended that manual models start in the highest power mode and decrease it as needed. All you have to do to unlock automatic devices is take out the regulator from the lock.

The inclusion of speed modes serves purposes beyond mere convenience. This makes sense economically as well. A regime device can save up to 40% of energy in contrast to normal.

Empiric selection of pumps

Heated area (m2)	Performance (m3/hour)	Brands
80 – 240	From 0.5 to 2.5	25 – 40
100 – 265	Is the same	32 – 40
140 – 270	From 0.5 to 2.7	25 – 60
165 – 310	Is the same	32 – 60

Note: The diameter of the pipes is indicated by the first digit in the third column, and the lifting height by the second.

By utilizing the data, selecting the appropriate device for long-term and sustainable operation can be done with ease.

For comfort and efficiency when heating your home, selecting the right pump is essential. It’s important to choose a pump that meets both your heating system’s and your own demands, not just any old pump.

First and foremost, it’s critical to comprehend the factors that go into choosing a pump. You must take into account elements like your home’s size, the kind of heating system you have, and the pump’s required water-moving distance. You can use these factors to calculate the head pressure and flow rate your pump needs.

Though it may seem difficult, calculating these parameters is necessary to guarantee optimal performance. To help you choose the proper specifications for your pump, you can use online calculators or speak with heating experts.

It is now time to select the equipment after you have computed the required parameters. There are many different kinds of pumps available, such as variable-speed pumps and circulating pumps. Every kind has benefits and drawbacks, so it’s critical to consider each in light of your unique requirements.

When making your choice, take energy efficiency, noise level, and installation ease into account. You want a pump that works effectively and silently in addition to fulfilling your heating needs.

In the end, choosing the best pump for heating your home needs careful thought and preparation. You can make sure your home has the best heating performance and comfort by comprehending the parameters, figuring out the specs, and selecting the right equipment.

Video on the topic

Calculation of the built-in boiler pump in the system with a hydraulic arrow and primary-second rings

A pump for a well, how to choose?

How to choose a circulation pump?