Two heating with a pump

Keeping our homes warm and comfortable becomes more important as winter draws near. A growing number of homeowners are using cutting-edge heating options that provide cost- and energy-effectiveness in addition to keeping the cold at bay. Heat pump-based dual heating systems are one such solution that is becoming more and more common. These systems use the most recent advancements in heat pump technology to offer a flexible and eco-friendly method of heating your house.

If you want to keep your home comfortable while lowering your carbon footprint, heat pumps are a great option. In contrast to conventional heating systems that produce heat through fuel combustion, heat pumps utilize ground or outdoor air to transfer heat into your house. Compared to traditional heating methods, this process is not only more energy-efficient but also more sustainable. This is further enhanced by the dual heating approach, which combines two distinct kinds of heat pump systems to increase dependability and efficiency.

An air-source heat pump and a ground-source heat pump are usually used in a dual system; both work in harmony to deliver reliable, efficient heating. The air-source heat pump works effectively in cooler weather, drawing heat from the surrounding air. The ground-source pump uses the more stable temperatures below ground to continuously heat the space during colder months, when the air-source pump may become less effective. Over time, this synergy helps to significantly reduce heating costs while also ensuring optimal comfort.

Adding a dual heat pump system to your house will improve comfort without sacrificing sustainability. These systems are a progressive option for contemporary homeowners as energy expenses keep rising and environmental concerns gain more importance. They are an excellent investment in today’s real estate market since they not only provide continuous energy savings but also significantly increase the value of your home.

Two -pipe wiring of the heating system: classification, types and types

One or two pipes may be used in the water heating system. The term "two-pipe" refers to the fact that two pipes are required for operation: one hot coolant that is fed into the radiators directly from the boiler, and another cooled coolant that is taken out of the heating elements and fed back into the boiler. Such a system can operate on any kind of boiler using any fuel. It is possible to use forced or natural circulation. Buildings that have one story, two stories, or more floors are equipped with two-pipe systems.

Advantages and disadvantages

The primary drawback of this heating system organization approach stems from the coolant circulation method: two times as many pipes are required as in the primary competitor’s single-pipe system. In spite of this, the cost of purchasing materials is only marginally higher because the 2-pipe system makes use of smaller diameter pipes and fittings, which are also significantly less expensive. The cost of materials is therefore somewhat higher as a result. In actuality, there is more work involved, which means twice as much time is needed.

Two-pipe radial and standard heating system

This drawback is compensated by the fact that on each radiator you can put a thermoregulating head, with which the system is easily balanced in automatic mode, which cannot be made in a single -pipe system. On such a device, set the desired temperature of the coolant and it is constantly maintained with a small error (the exact value of the error depends on the brand). In a single -pipe system, it is possible to implement the ability to adjust the temperature of each radiator separately, but this requires a bypass with a needle or three -way tap, which complicates and increases the cost of nullifying, nullifying the winnings in money for the purchase of materials and time for installing.

One other disadvantage of two-pipe is that radiator repairs cannot be done without the system being stopped. Although this is inconvenient, you can get around it by placing ball valves close to each heating element on the feed and return. If they’re blocked, you can take out and fix a heated towel rail or radiator. You can use the system for as long as you’d like.

To compensate for the regulatory reinforcement on each radiator, the system can be designed to

However, there is a significant benefit to this type of heating arrangement: in contrast to a single pipe, which exists in a system with two highways for every heating element, water at the same temperature is delivered straight from the boiler. Installing thermostatic heads or taps to control the flow’s intensity fixes the issue, even though the system tries to take the path of least resistance and won’t spread past the first radiator.

One more benefit is that gravity heating or forced circulation systems with smaller pumps can be implemented with less pressure loss and ease.

Dual heating systems utilizing heat pumps offer a versatile and energy-efficient solution for home heating and insulation. By combining a heat pump with another heating source, such as a gas boiler or solar panels, homeowners can optimize their energy usage and reduce costs. Heat pumps work efficiently by transferring heat from outside to inside the home, even in colder temperatures. When the weather gets extremely cold and the heat pump"s efficiency drops, the secondary heating system kicks in to provide additional warmth. This not only ensures a consistent indoor temperature but also minimizes reliance on more expensive or less environmentally friendly heating options. This approach is particularly beneficial for regions with variable climates, allowing for flexibility and improved control over home heating.

Classification 2 pipe systems

Heating systems of any type are divided into open and closed. In closed, an expansion tank of a membrane type is installed, which makes it possible to operate on the system with increased pressure. Such a system makes it possible to use not only water as a coolant, but also compositions based on ethylene glycol, which have a reduced freezing temperature (up to -40 O C) and are also called antifreeze. For the normal operation of equipment in heating systems, special compositions designed for these purposes, and not general purposes, should be used, and even more so, not automobile. The same applies to the additives used and additives: only specialized. It is especially hard to adhere to this rule when using expensive modern boilers with automatic control – repairs during problems will not be warranty, even if the breakdown is not directly related to the coolant.

Depending on its type, the expansion tank’s installation location

An open-type expansion tank is constructed at the highest point in an open system. Typically, it has a pipe attached to it to remove air from the system and to set up a pipeline to drain the system’s excess water. There are occasions when they can obtain warm water for domestic use from the expansion tank; however, in these situations, an automatic system must be set up and additives should not be used.

Closed systems offer greater security, which is why the majority of contemporary boilers are designed for them. Click here to learn more about closed heating systems.

Vertical and horizontal two -pipe system

A two-pipe system can be organized in one of two ways: vertically or horizontally. The majority of the time, multi-story buildings use vertical. The ability to connect radiators on every floor is easily achieved, though it does require additional pipes. The primary benefit of this type of system is the air’s automatic output, which exits through a descent valve or an expansion tank depending on its tendency to rise.

Vertical wiring with two pipes for a multi-story building’s heating system

One-story or, at most, two-story homes are more likely to use the horizontal two-pipe system. The "Maevsky" crane is installed to draw air from the system for the radiators.

A two-story private home’s two-pipe horizontal heating system (click on the image to enlarge it)

Upper and lower wiring

By the method of serving the supply, the system is distinguished with the upper and lower feed. During the upper wiring, the pipe goes under the ceiling, and from it down the feed pipe is lowered down to the radiators. The return goes along the floor. This method is good in that you can easily make a system with natural circulation – the height difference creates a stream of sufficient power to ensure good circulation speed, you only need to observe a slope with a sufficient angle. But such a system is becoming less and less popular due to aesthetic considerations. Although, if you hide the pipes at the top under the suspended or stretch ceiling, then only the pipes to the instruments will remain in sight, and they, in fact, can be highlighted in the wall. Upper and lower wiring are used in vertical two -pipe systems. The difference is demonstrated in the figure.

With an upper and lower coolant eyeliner, the two-pipe system

With the lower wiring, the feed pipe goes down, but higher than the return. The feed tube can be placed in the basement or semi -basement (the return is even lower), between the draft and the final floor and t.D. You can bring/take the coolant to the radiators by passing the pipes through the holes in the floor. With this location, the connection is the most hidden and aesthetic. But here you need to select the location of the boiler: in systems with forced circulation, its position relative to radiators does not matter – the pump will “be sold”, but in systems with natural circulation, radiators should be higher than the boiler level, for which the boiler is buried.

Different radiator connection diagram for a two-pipe system

The video shows an example of a two-story private home’s two-pipe heating system. It has two wings, and the lower kind of wiring, known as valves, controls the temperature in each of them. Because the boiler is mounted on the wall, the system has forced circulation.

Dead -end and passing two -pipe systems

A system known as Dead East has multidirectional coolant and return movement. A passing system is in place. It is also known as the "Tichelman" loop or diagram. With longer networks in particular, the latter option is simpler to balance and adjust. The system will automatically balance if radiators with the same number of sections are installed and the coolant passes through them. However, in the case of a dead end diagram, each radiator will need to have a thermostatic valve or needle valve installed.

Two-pipe systems with two coolant movement circuits: a dead end and a passing circuit

The "Tichelman" scheme must be installed even if the radiators and valves/valves of various sections are already installed with it. This is because the likelihood of balancing the scheme is higher than that of a dead end, particularly if the scheme is lengthy.

Strong screwing is required to balance a two-pipe system with multidirectional coolant movement. This valve is on the first radiator. There’s also a chance that it will have to be closed to the point where coolant won’t go there. It turns out that you have to make a decision between the two batteries because in the former case the heat transfer cannot be aligned and the battery in the latter will not warm up on the network.

Heating systems for two wings

And yet, more often they use a system with a dead end circuit. And all because the lining of the return is longer and it is more difficult to collect it. If your heating circuit is not very large, it is quite possible to adjust the heat transfer on each radiator and with a dead end connection. If the circuit is large, but I don’t want to do the loop of the “Tichelman”, one large heating circuit can be divided into two smaller wings. There is a condition – for this there should be a technical possibility of such a network construction. At the same time, in each circuit, after separation, it is necessary to put valves, which will regulate the intensity of the flow of the coolant in each contours. Without such valves, to balance the system is either very difficult or impossible.

The video shows several coolant circulation techniques and provides helpful advice on equipment selection and installation for heating systems.

Connection of heating radiators with a two -pipe system

Any of the following techniques can be used to connect radiators in a two-pipe system: lower, one-sided, and diagonal (cross). A diagonal connection is the most favorable choice. In this instance, the heating device’s heat transfer may be between 95 and 98% of its stated thermal power.

Schematics showing how to connect radiators to a two-pipe system

Even though the heat losses for each type of connection vary, they are all still utilized—just in different contexts. Even though it is the least effective, the lower connection is more typical if the pipes are installed beneath the floor. It is easiest to apply in this situation. You can connect the radiators in different configurations with a concealed laying, but either the pipes must be concealed in the wall or there are significant portions of them that are visible.

If necessary, the side connection is practiced with a maximum of 15 sections. Although there is nearly no heat loss in this instance, a diagonal connection is still necessary when there are more than 15 radiator sections because without it, there would not be enough circulation and heat transfer.

Two-pipe schemes are more popular because they are more dependable, even though they require more materials to set up. Additionally, it is simpler to make up for such a system.

Classification, advantages and disadvantages of a two -pipe heating system

Based on the organizational principle employed, the two-pipe heating system gets its name. A system like this has two pipes: one pipe sends heated coolant to the batteries, and the other pipe returns cooled water from the heating elements to the boiler.

Boiler equipment that runs on any kind of fuel can be equipped with two-pipe systems that allow for both forced and natural coolant circulation. Two-pipe systems can be installed in both multi-story and low-rise buildings.

Advantages and disadvantages

Let’s begin with the drawbacks:

1. The main minus of the two -pipe principle is an increased consumption of materials. However, this drawback is leveled by the fact that with such a scheme, lower diameter pipes are used. The same can be said about the size of fittings. Less size – lower costs of materials, and therefore price.
2. Another drawback of such a heating scheme is increased labor costs. This is natural, since there are twice as many pipes.
3. Lack of the possibility of battery repair without stopping the entire system. You can correct the situation if the calculation of the two -pipe heating system provides for the presence of ball valves near all heating devices (both at the feed and on the return). After covering the cranes, you can repair the battery or heated towel rail.

The following information is among the benefits of two-pipe heating:

1. For each battery, you can install the heat -regulating head, so that the balance in the system will be supported automatically. With a single -pipe device, it is difficult to implement management on individual radiators, since you need a bypass with a three -way or needle crane, which will make the system much more expensive and more complicated.
2. In contrast to a single -pipe device in a two -pipe system, water is supplied to all heating elements of the same temperature – directly from the boiler. The water supply intensity is regulated by thermostatic heads and taps, so problems with pressure are excluded.
3. Small pressure losses and a significantly simpler implementation of heating based on a groove. If you need forced circulation pumps, you can use equipment of lower power than in the case of single -pipe systems.

Classification of equipment

A private home’s two-pipe heating system may be either open or closed. The latter stipulates that a membrane expansion tank must be present in order for the system to operate at high pressure.

Water is not the only substance that can carry heat; ethylene glycols that can function at low temperatures—up to 40 degrees below zero—can also be used. Antifreeze is a term for compounds based on ethylene glycol.

It should be noted that only when using specialized compositions meant specifically for heating purposes can the equipment be guaranteed to operate properly. Antifreeze for cars is not appropriate. The same holds true for additives; only those that have been specifically designed for heating should be used.

Adherence to this recommendation is particularly crucial when operating automated boiler models that are costly. When a boiler malfunctions and is not directly caused by the heat carrier, manufacturers typically absolve themselves of liability and do not perform warranty repairs.

Since closed type systems offer the highest level of security, the majority of boilers manufactured today are designed for use in these kinds of systems.

The expansion tank is located in the upper section of open systems. The tank has a pipe connected to it for air output and another pipe to drain the system of extra water. For household needs, you can choose hot water from the tank; however, in this instance, it is best to set up an automatic water supply. Furthermore, technical and additive additives should not be present in the water used for residents’ needs.

Two -pipe system of vertical and horizontal types

Vertical and horizontal system organizations are the two types with two highways. In apartment buildings, pipes are typically arranged vertically. Numerous pipes are required to implement the system, but this also makes it possible to dive to apartments on every floor. An expansion tank or a descent valve are used to display the air’s natural recoil as it rushes upward, which is the main benefit of this type of system.

Houses with one or two stories typically have a two-pipe horizontal heating system. Here, air is removed with Maevsky taps.

Upper and lower wiring

One of two principles is used in the wiring of the heat carrier: the upper or lower. The feed pipes lead down to the batteries if the wiring is upper, and the pipeline is situated in the subterranean area. The return is placed on the ground. This option has the benefit of making it simple to set up natural circulation because of the height differences and the coolant’s good speed at an angle in the pipe, which is specifically positioned at an angle.

However, because striking pipes are unsightly from the outside, systems with less wiring are not as common. If a stretch or suspended ceiling is installed over the pipeline, the issue can be resolved.

Note: Two-pipe systems use both types of wiring. The figure below illustrates the schemes’ differences in a clear manner.

The feed pipe is below but slightly above the return if the wiring is set up using the lower principle. Additionally, the pipes can be integrated into the floor or installed in a semi-basement or basement. Because it is more aesthetically pleasing, this wiring technique is widely used.

But, if we are discussing natural coolant circulation, then the lower method requires careful boiler installation location selection because the batteries are supposed to be above the boiler. The equipment’s location in relation to the batteries is irrelevant in the event of mandatory circulation.

A two-story house’s two-pipe heating system is separated into two wings. Valves are used to control the temperature in both wings. The boiler is fixed to the wall using the lower type of wiring and forced circulation.

Dead -end

A dead end is a system where the thermal carrier travels through the feed and reverse stroke pipe in different directions. A system with a coolant passing direction (Tichelman circuit) is an additional choice. Particularly for large-scale heating networks, the passing scheme is simpler to balance and adjust.

Balancing is not necessary in a passing system with an equal number of radiator sections. Installation of thermal valves or needle valves on every radiator is necessary in a dead end.

Furthermore, it should be mentioned that setting the balance in a passing scheme will be much simpler than in a large, dead-end system, even if there are batteries with varying numbers of sections.

The first battery’s valve needs to be tightly tightened in order to balance the dead end circuit. It’s possible for a situation to arise where water stops entering the radiator entirely. Next, you have to decide which battery—the first or last—will be left out of the heating circuit.

Two heating system with two wings

However, the deadlock principle is more frequently used when installing a two-pipe heating system. The reverse line in passing schemes is longer and requires more intricate installation, which is the reason. Additionally, the heat from each battery can be balanced using a tiny heating circuit.

A few wings can be separated from the case with a large contour. It is important to keep in mind that developing a two-wing system requires starting with the technical admissibility of its design. Installing valves to control the heat carrier’s power is necessary in both configurations. Performing balancing cannot be done without valves.

Battery connection scheme

One of the three batteries—diagonal, one-sided, or lower—is used in two-pipe heating. The diagonal connection is the optimal method. in order for heating equipment to produce the most heat possible (up to 98% of the face value).

All of the various radiator connection types are used, albeit for different purposes, due to their differences. For instance, the connection made using the lower principle performs similarly well, so if the pipeline needs to be buried, this is a good choice.

One-sided and diagonal schemes can also use disguised pipe laying; however, in these scenarios, sizable sections of pipes will remain visible and can only be concealed by wall décor.

For sections up to fifteen units in number, lateral type radiator connections are used; in this scenario, thermal losses are essentially nonexistent. A diagonal connection is required if there are more than 15 sections because only this technique will allow the coolant and heat outlet to circulate normally.

We make a two -pipe heating system of a private house – instruction

Two -pipe heating system is a proven and effective way to heat a private house. Such a system allows you to regulate the heating of any room without changing the temperature in the remaining rooms of the house. A two -pipe heating system can be used in houses of any number of storeys. The main feature of the two -pipe system is the separation of the direct and reverse of the coolant. According to the supplied, so -called pipe, heated water from the boiler enters the system, the coolant is analyzed from it into radiators, coils, a warm floor system. After passing through them, the cooled fluid is diverted using another pipe – reverse.

This private home’s heating system is two pipes.

The two-pipe system offers the following benefits:

• Ease of regulating the flow of coolant in any of the radiators;
• The possibility of using any number of storeys in the house;
• The possibility of installing systems of significant length.

The fact that there are more pipes than in a one-pipe system is one of the drawbacks. The direct water current pipes should be placed above the level of the radiators; typically, they are laid under the ceiling or at the level of the windowsill. This will complicate installation and detract from the system’s aesthetic appeal.

Type of Heating System	Description
Heat Pump	A heat pump is a versatile system that can provide both heating and cooling to a home by transferring heat from outside air, even in cold weather, to warm the house.
Dual-Source Heat Pump	This system combines features of air-source and geothermal heat pumps, offering improved efficiency and reliability in extreme temperatures, both hot and cold.

Heat pump-integrated dual heating systems are a flexible and economical option for contemporary homes. These systems deftly combine the benefits of heat pumps’ renewable energy source with the dependability of conventional heating techniques. Together, they not only offer reliable comfort in a range of weather conditions, but they also considerably lessen the carbon footprint associated with home heating.

Cost-effectiveness is one of the main advantages of combining a heat pump and dual heating system. These systems reduce the dependency on fossil fuels, which are frequently subject to price fluctuations, by harnessing ground heat or ambient air. Homeowners will notice a significant reduction in their energy costs over time, which will increase the value of their initial heat pump system investment.

Furthermore, the versatility of heat pump-equipped dual heating systems is particularly useful in areas with varying weather patterns. In cooler weather, the heat pump runs effectively on its own and uses less energy. The system can convert to a more conventional heating mode during the colder months, guaranteeing that ideal interior temperatures are maintained without consuming excessive amounts of energy.

Adopting such cutting-edge heating solutions helps achieve both larger environmental goals and the financial and comfort needs of individual households. As more houses become less dependent on fossil fuels for energy, we make a bigger contribution to the global effort to slow down climate change. As a result, homeowners looking at new heating options should definitely assess the advantages of having heat pumps in addition to dual heating systems.

Video on the topic

I tell you why I put two pumps in the heating system

Heating system on one pump and 19 radiators on two floors.

Installation error "in 2 wings". DIY heating installation.