Scheme of heating from a gas boiler in a two-story house: Overview and comparison of the best heating schemes

Build a new or repair the old house, and it came to the heating system? Do not know which type of wiring is better to choose? The correctly composed of the heating scheme from the gas boiler in a two-story house. a pledge of not only heat and comfort in winter, but also the uninterrupted operation of the equipment.

A competent project of heating takes into account many factors. from climate and financial capabilities, until the need for point setting and aesthetic issues. In this article, we will analyze all possible types of heating systems in detail, we give and compare ready-made schemes with the most successful set of parameters for different cases, as well as indicate the possibilities of their modification.

Why put two boilers at once?

The role of leading in the Gazelectro bundle usually performs a gas unit. This is logical for at least due to the lower cost of fuel being used. But above sounded the word “save”, and it is incomprehensible, what is the reduction of expenses.

The fact is that in many regions there is an electricity tariff on the day / night system. In some cases, it turns out at least a bit, but more economical than the payment for gas. The difference is questionable, however, as an additional reason in the piggy bank of the arguments for a double bunch can serve.

Installation of an electric boiler in a bundle with gas can play backup or additional role in the general heat supply organization. When choosing the power of the equipment, it is necessary to focus on the purpose of using it

Of course, this is not such a significant reason to immediately design the heating system with 2 boilers. The main advantages of the scheme. power gain and uninterrupted work. When choosing and installing a heat generator, it is necessary to clearly understand that any device and fuel supply are not eternal.

Turn off the power supply, can overlap the gas highway due to leakage, the voltage will fall on the network or a banal breakage of the aggregate itself will occur. In this case, you risk staying without heat and hot water in the cold season.

To ensure uninterrupted operation of the heating equipment or increase the power of the system as a whole, you can admit to work at once 2 boilers operating on different fuel

This is called an additional connection (for power amplification) or a backup power source, depending on the purposes and emerging situations.

Varieties of layout

As mentioned, there are many different layout methods. Each of them has certain properties and differences. So consider them in more detail.


Here is meant the connection of the pipeline with an open expansion tank. Covering his cover is not sealed and able to pass the air out of the room. It is located at the highest point, in the attic or under the ceiling of the boiler room.

Such a scheme is the simplest, but also requiring constant attention. Liquid evaporates and regularly monitor the level and top up. Insufficient fluid leads to the fact that air is delayed in the pipeline, which causes the occurrence of air traffic jams and improper operation of heating.

Important! Open two-circuit heating system, the scheme of which is shown slightly lower, is the simplest and least costly in the number of components.


Here the system is built on a similar principle: with expansion tank. However, this is no longer an ordinary capacitance with a lid, and a special reservoir, inside which there is a elastic partition, membrane. In one half there is water, to another. compressed air with a certain pressure.

The principle of operation of the membrane expansion tank is the following. With an increase in water pressure (this occurs when it is heated and the corresponding expansion, which is reflected on the pressure), the water compartment is expanded, which is filled with a large volume of water. At the same time, there is a proportional compression of the “air” chamber.

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As a result of a decrease in volume, an increase in air pressure begins until the water pressure is being equalized. When the discharge of the system decreases, the membrane reduction begins and the decrease in the compartment filled with water, as a result of which the “pushing” of the coolant begins back to the pipeline, thereby compensate for the pressure reduction.

Such an expansion tank device provides a constant water return until the water and air pressure reached the same value. In addition, the membrane expansion tank reduces the likelihood of a sudden pressure jump (hydroudar).

Healthy! The hydroudar in the heating system is called a sudden change in the circulation rate of the coolant, which occurs when cutting the pipeline overlap. Increased incidence of negatively affects the integrity of pipes or shut-off reinforcement.

Lower and top

The difference between these schemes is the location of the pipes relative to each other. For the two-circuit system of heating with an upper wings, it is implied to mount the pipe supplying water at the maximum height (above the windows, under the ceiling). “Filtment”, pipes that return water into the boiler are placed as low as possible (along the floor).

Expansion tank for such systems is required. It can be installed both closed and open (not a hermetic) tank. The advantage of this scheme of the two-kinning heating system is the high speed circulation of the coolant, the disadvantage is that almost half of the heat leaves up (as “feed” is very high).

When designing a two-circuit heating system with lower wiring “Feed” is mounted directly over the “return” (as a last resort. at the level “under the windowson”). It does not observe high pressures inside the pipeline, so the option of the formation of “air traffic jams” is allowed. The problem is solved by the installation of Maevsky cranes on each of the floors.

Installation of the expansion tank is possible anywhere: in the attic or in the boiler room. The advantage of this method is that the lower layout is not so “striking”, which is important when complying with the relevant interior of the room. Minus schemes in the fact that it will not be able to work efficiently without an additional circulation pump (built into the boiler or installed separately).

Horizontal and vertical

Horizontal two-circuit heating schemes. the most popular layout option for single-storey country cottages. The advantage of this method is reflected in a whole range of positive qualities:

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  • The possibility of disconnecting a separate room from the total branch, which is convenient when performing technical works.
  • Adjust the heating power of the plot in different rooms.
  • Develop a project separately brought room individually.
  • Build heating room on the principle of “warm sex”.

Healthy! The two-kinning horizontal heating system can be closed or open. An ordinary or membrane expansion tank may be present in its scheme.

Vertical wiring is used in cottages with two, three or more, floors. The principle of its work is that with the help of a powerful circulation pump, the heat-censing fluid is supplied to the top floor, where does it roll down. Thus, it falls into all risers and radiators, providing optimal room temperature. The expansion tank is posted as above. For example, it may be an attic or a mansard room.

Important! In comparison with the horizontal scheme, the vertical layout is more efficient, since more discharge is injected here, which has a positive effect on the water circulation rates and the rapid warm-up.


Two-pipe tunnel (shoulder) schemes. the most popular options for laying heating pipes for country houses. It is the following:

  • Mounted from one or more dual-circuit branches. The supply of heat carrier is carried out on one, return. on the other.
  • Circulation is carried out due to excess pressure of 1-2.5 bar injected by an embedded electric pump installed near the heating element.
  • In the boiler room, an expansion membrane tank is mounted, which compensates for the temperature expansion of water.
  • Formed air traffic jams are removed by the Maevsky crane on radiators and automatic valve in the boiler security unit. It also establishes a pressure gauge and safety valve.
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Electric and diesel heat generators

Connecting the boiler on the diesel fuel to the radiator system is performed identical to the strapping of gas-grade installations. Cause: The diesel unit operates on a similar principle. the electronics-controlled burner with a flame heats the heat exchanger, maintaining the specified temperature of the coolant.

Clarification. The recommendation does not apply to heaters equipped with a homemade burner, burning diesel and waste oil, for example, Babington torch burner. An individual approach is needed here.

Electrocotels in which water is heated by the Tanni, the induction core or due to the electrolysis of salts, is also connected to heating directly. Maintenance of temperature and security is responsible for automatics, located in an electrical cabinet, connected to the network according to the electrochchem. Other accounted options are shown in a separate publication on the installation of electric heating boilers.

Wall mini-boiler rooms equipped with tubular heaters are intended only for closed heating systems. To work with the samotane wiring, you will need an electrode or induction unit that is assigned according to the standard scheme:

If you figure it out, the bypass is not needed here. without electricity, the boiler will not work too

As conclusions, we will offer several simple tips on organizing a comfortable heating of a private house using solid fuel and electricity:

  • Combined boiler on firewood and electricity. one of the best options for a cottage or residential house of a small area. In the cottage for 2-4 floors, the Ten can only protect the system from defrosting.
  • In a country house over 100 m² appropriately apply 2 separate heat sources with proper strapping.
  • When electricity is supplied with interruptions or the limit of power does not exceed 5 kW, it is not necessary to contact the electricity at all. Find the opportunity to purchase a long-term combustion heat generator, although at the price it will cost more than the usual.
  • Do not throw off the opportunity to arrange air heating on firewood from the furnace if it is already purchased or built. In night time, install electrical convectors or fan heaters equipped with thermostats.

The latter way is often heated by wooden houses in Scandinavian countries, where homeowners are familiar with the crackle frosts not to be. About it. the last

One boiler for two houses

Hello. I am building a house in the Southern Moscow region next to the old, the distance between houses is less than 10 meters. Old house input with brother, so I build your own, separate. It is gasified, respectively heated by a gas boiler, and hot water. Gas column. Since connecting gas to a new house for a very long time, expensive and troublesome, I want to pull two houses with one boiler from the old house, at least temporarily, before gasification of the new house. As far as this is real? It seems to read, do it. How to implement? Do I need to bring alterations to from the old house? I see it like this: we divide the exit from the boiler for two pipes, each to your home, then the returns converge into one in front of the boiler. And in each contour your pump. Is I think right? And what power you need a boiler then if the old house is about one hundred squares, new. Approximately 140. Both brick houses, well insulated.

Specialist Octopus (Nick) will take your branch in the near future. Expect a response within a few days.

I apologize for the long wait. Indeed, nothing prevents the ability to pull two nearby houses from one boiler. Regarding the order of organization of such a system, you think quite right:

1) Install the boiler for greater power;

2) Install the feed and reverse collectors at the installation site of the boiler with two outputs for two different homes;

3) Install in each of the individual circuits circulation pump with a check valve, filter and pressure gauges, thermometers. all in the feed line;

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4) We establish balancing valves (for linking home heating systems with each other) in the reverse line before combining in the reverse comb;

5) between the houses lay the heating pipe. At least DN32 PPR in insulation from mineral wool or synthetic rubber / closed polyethylene thick 40.0-50,0mm.

Regarding the power of the boiler. It is difficult to say something accurate without pay, but it is necessary to navigate for 12.0kW for the old house, 16.0-17.0 kW for a new house. Total, the total boiler power will be around 30.0 kW. Accordingly, from my point of view, you can take a mounted gas boiler with a modulated burner with a capacity of 30.0-35.0 kW. will be cheap and economical.

Choose pumps with a pressure of approximately 4.0-5.0 m and expenditures 0.52 and 0.73 m3 / h.

Hello I have this situation, please answer. In short, in the house of the Covelet ‘Pechi’ stones the middle and there the way out one pipe, from the pipe to be divided into two sides left and right. Here is the problem of circulation from the left side quickly and right bad on the last bare barely barely, not hot and warmer. And the sides are already very hot hot and how this spells the pump did not help. Left side two rooms, with right 4 rooms. And the pump with the left quickly gains. What do thanks do in advance.

We do not disassemble questions specified in the branches of other readers. If the question is relevant, then take it out, please visit the site, in the section Question. Answer, Orange Button Ask a question on each page of the site, and we will understand everything.

Adjustment of overpressure in the heating system

The operation of a solid fuel boiler is associated with such a phenomenon, as a significant increase in pressure in the system due to temperature increase, to control which is quite difficult. To protect the system in such cases, an open expansion tank is used, connected to the atmosphere, which allows the coolant (water) to expand without increasing pressure in the pipes. At a temperature greater than the norm, excess of heated water through the hole in the tank simply flows into the sewer.

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Open expansion tank. the main difference between a solid fuel boiler from the gas. The latter is equipped with automation controlling the temperature and pressure in the system, without giving the heat carrier to overheat. The advantage of such a closed self-regulating system is also the fact that it falls at least oxygen from outside, reducing the risk of corrosion of metal parts. But such a system has a certain overpressure, which is regulated by a safety valve and an expansion tank, only they are mounted in the body of the boiler, and not separately, like solid fuel boilers.

Conclusions and useful video

Information videos will expand your knowledge of heating systems 2- and 3-storey houses.

Roller # 1. Connection diagram of a two-circuit radiator system of heating with “warm floors”:

Roller # 2. Option of the heating system in a 3-storey building (with the use of “Leningradka”):

Combi Boiler with Two Heating Zones, 230V Switching

Roller # 3. The practical application of the system with natural circulation of the coolant (on a solid fuel boiler):

Thus, two-pipe heating systems with a liquid coolant equipped with a gas or electric boiler and circulation pump can be most effective. Combined systems are more efficient, the selection of heat sources depends on the floor and construction of the house.

In any case, it is recommended to consult with heat engineers and designers to compile an individual scheme.

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