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Which heating system is better - one-pipe or two-pipe?

Igor

Topic created April 1, 2019

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Good day! Friends, please help. How much (in percentage terms) is a one-pipe heating system equipped with a circulation pump worse than a two-pipe heating system under equal operating conditions? Example: alternate placement in the same room, with the same number, the same connection diagram for radiators, with the wiring horizontal and below the radiators.

And one more thing, how to make the one-pipe system mentioned above so that it works normally? What subtleties should be taken into account? How will the two-pipe and single-pipe systems work on one boiler? Are there any nuances in such combinations that can seriously affect the operation of the system? For example, the height of the monotube ring relative to the two-tube.

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Visitors Comments

Expert
Alexey Dedyulin
Expert
To answer
Good afternoon. A single-pipe is no worse than a two-pipe under equal conditions. They are just different by definition. The key difference is the wiring. Efficiency depends on the correct design of the selected heating system, the efficiency of the gas boiler itself and the quality of the gas produced.
Features of single pipe (Leningradka):
1. Requires consistent tracing. The coolant passes from one radiator to another and so on until it returns to the boiler;
2. An effective system on an area of one floor of not more than 100 m2. For example, a one-story house S = 120 m2, the system will not work. At the same time, it copes well with its task in a two-story building where each area is 80 m2;
3. Complex temperature control of each radiator and balancing of the system as a whole. Installing bypasses partially solves the problem, but aesthetically this is not always acceptable;
4. An important factor because of which they often prefer Leningrad is its availability.
You can see the principle of single-pipe wiring in the diagram attached below. And more detailed information with all the nuances about the device of this system can be found on our website here.
Two pipe system:
1. Gives freedom of action during wiring. There are two options: deadlock system and Tichelman loop;
2. There are no restrictions on the area of one floor;
3. Allows the installation of temperature control valves directly to the radiator.You will have the opportunity without problematic temperature control in different rooms;
4. More expensive monotube in the device by 20-30%.
You can also get acquainted in detail with the nuances on our website here in this article.
Regarding the connection diagrams of the radiators themselves - your option has the least efficiency. In the two figures that I attached, the heat transfer power from the radiator is clearly visible with one-way connection and two-way in various combinations.
It is impossible to equip two different systems in one house and it is impossible to connect to one boiler.
Attached photos:

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