When solving the problem of housing heating, there are many combinations of building a system for supplying and discharging a coolant. Each heating layout in a private house can be classified according to several criteria.
We offer to understand the nuances of arranging and working possible options. Understanding the principles of design, the pros and cons of each type of wiring, will help to plan the geometry of the system and its structure, taking into account the individual characteristics of the room.
Modeling Optimal Contour Geometry
For one private house, several closed water circuits can be designed that will heat different rooms. They can differ significantly from each other by the type of wiring.
When designing, first of all, they proceed from the operability of the system, as well as the optimal geometry from the standpoint of minimizing costs, ease of installation and the ability to fit heating elements into the design of the premises.
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The main task of the heating system being built for a private house is to fully compensate for the heat loss that occurs through building structures and openings
The wiring option is selected so as to reduce heat loss as much as possible. Not more than 10% of the pipeline should pass through unheated rooms
To a large extent, the budget of the owners of the house affects the choice of the system. Based on financial capabilities, the technical equipment of the structure, the type of coolant movement and its effectiveness are determined
The more technical means are required for the system to work, the more efficient it is, but also the more situations associated with breakdowns and repairs
The selection of the optimal heating distribution for a country house should take into account the relationship of the circuit with other utilities
At the design stage, it is necessary to clearly determine the type of boiler planned for use for heating in order to thoroughly consider the organization of the boiler room and fuel storage
You should initially consider the possibility of adjusting the operating modes of the system and the placement of regulatory equipment
At the design stage of the heating distribution, it is required to determine the most convenient arrangement of instruments and equipment that facilitate maintenance and create operational comfort
The main task of the heating system
Guidelines for choosing a wiring diagram
Open version of the heating system
Forced type closed loop
Interconnecting heating with other utilities
Type of boiler and organization of the boiler room
Heating mode adjustment
Access for maintenance and repair
Natural and forced water circulation
Heating the coolant for heating the house occurs in one or more devices located indoors. This can be stoves, fireplaces, as well as gas, electric or solid fuel boilers.
The water pressure in the circuit is provided either by using circulation pumps or by aligning the geometry of the system, which allows creating conditions for natural circulation.
Also, a central heating system for several houses can be a source of hot water. In case of low pressure, it is possible to connect circulation pumps to create additional pressure and increase the speed of fluid movement through the pipes.
Installing a circulation pump creates sufficient pressure in the system, making it possible to use wiring options that cannot be used in natural circulation
When choosing an option with natural circulation of the coolant or low pressure in the pipes with central heating, it is necessary to carefully consider the possibility of maximizing the use of physical laws that allow you to start and maintain fluid motion.
A mandatory element of the wiring in this case is the acceleration collector. It is a vertical pipe through which hot water rises, then is distributed over the heating devices and, having lost the initial temperature, flows down.
Due to the different density, a difference in the hydrostatic pressure of the hot and cold liquid column occurs, which is the driving force for water circulation.
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Gravity Open System
Simplicity and affordability
Devices in natural type systems
Radiator with Mayevsky tap
Pump version of the heating system
Technical equipment of pumping circuits
Automatic air vent
Closed-system air vents
Vertical and horizontal wiring
The supply of hot water to the radiators can be carried out in various ways. The wiring is conventionally divided into vertical and horizontal, according to the position of the pipes (risers) that supply water directly to the heating radiators.
In modern homes, horizontal is used more often than vertical heating. The reason is that the layout of radiators on different floors rarely coincide.
Vertical diagrams with the top supply of hot water, the difference in hydrostatic pressure between the warm and cold segments of the circuit is used to the maximum, so they are almost always used for natural circulation, as well as for low pressure in the system.
In addition, such schemes are operable in case of an emergency shutdown of the pump, which may occur due to its breakdown or lack of electricity.
Wiring with a lower feed is practically not used for heating with natural circulation. If there is good pressure in the system, its use is justified, since such a scheme has two significant advantages, relative to an alternative option.
Advantages of the scheme:
- shorter total length of pipes used;
- there is no need to hold pipes in the attic or technological niches under the ceiling of the second floor.
Horizontal layout heating distributions are used for one-story private houses. If a building has two or more floors, then it is often used when vertical risers are undesirable from a design perspective.
Horizontal pipes supplying and discharging water can be organically fit into the interior of the premises, as well as hidden under the floor or in niches located at the floor level.
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Vertical heating system layout
Two-pipe vertical system with top wiring
Horizontal type of wiring
Features of the device of horizontal circuits
Choice of one or two pipe option
The supply of hot water and the discharge of the chilled one for the heating system of a private house can be made using one or two pipes. Each option has positive and negative sides, as well as features of use depending on the type of wiring.
From the perspective of interior design, the presence of a second pipe does not have any effect on the appearance of the heating system due to the lower version of connecting the system to radiators and the ability to reduce pipe diameters
Using a single pipe connection
The water heating scheme of a private house using one pipe to supply hot and drain cooled water is called a single pipe. The main advantage of such a system is to minimize pipe lengths.
The main advantages of the option:
- lowest costs for the purchase of elements of the heating system;
- the simplest and fastest installation;
- least risk of accident.
The main disadvantage of single-pipe heating is a gradual decrease in water temperature, which passes sequentially through all radiators in the circuit.
Therefore, it is necessary to use a slightly larger surface area of the last radiators (a larger number of elbows), which often eliminates the cost benefit of minimizing the length of the pipes.
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The principle of a single-pipe heating system
The specifics of connecting heating appliances
The minimum number of pipes in the device
Single tube top wiring option
Lower radiator connection option
Features of balancing the temperature in the circuit
Upgrading a single-tube circuit with top wiring
The method of constructing a heating circuit with one pipe
In addition, due to this drawback, there are restrictions for one circuit on the number of connected radiators. If there are too many of them, then the latter along the movement of the coolant will practically not radiate heat.
In addition, there is a problem in calculating heat transfer. It should be borne in mind that disconnecting the first radiators from the heating system leads to an increase in the temperature of the incoming water for subsequent devices.
It is pointless to use single-tube schemes with a vertical bottom wiring, since the length of the pipes will be the same as the two-pipe version, which eliminates all the advantages, but leaves minuses.
If the return of the coolant occurs along the same route as the supply, then the total length of the pipes with both options is almost the same
The heater is usually connected via bypass in order to be able to disconnect any of them without stopping the circulation of water along the circuit.
To save on taps, you can not bypass the water through the outlets, but then you will have to stop the operation of this part of the system and drain the water if it is necessary to replace or repair the radiator.
The most economical option is to use one steel pipe with a diameter of 1.5-2 inches without heating radiators. The lack of faucets and fittings makes this system also the most practical due to minimizing the risk of leaks or water breakthroughs.
Read more about the calculation of a single-pipe heating system in this article.
The use of a two-pipe heating option
The heating circuit scheme, when one pipe is used to supply hot water to heating devices, and the second - for returning chilled, is called a two-pipe.
Its main advantages:
- the temperature of the water supplied to all radiators is the same;
- turning off one or more radiators does not affect the temperature of the supplied water to other heating devices;
- restrictions on the number of radiators for one heating circuit depends only on the throughput volume of the pipes.
The main disadvantage of this wiring is a slight increase in the footage of the pipes.
This leads to some additional disadvantages:
- costs for the purchase and installation of elements of the heating system increase;
- complicated integration into the interior of a private house.
The number of fittings and taps with a two-pipe system is almost the same as with a single-pipe system.
For the associated coolant motion scheme, the total length of the pipes when using a two-pipe system increases by the distance between the first and last radiator. Sometimes it is insignificant compared to the entire length of the contour.
Depending on the relative movement of hot and chilled water, two-pipe wiring schemes are divided into two types:
- in passing;
- dead end.
Passing scheme. Both flows move in the same direction and, thus, the cycle length of the coolant revolution is the same for each radiator. In this case, their heating is equal in speed when the heating system starts.
Dead end option. The direction of movement of hot and chilled water is oncoming. Heating of radiators closest to the boiler is faster.
The lower the speed of water, the more noticeable this effect, therefore, with natural circulation, heating of some rooms will occur much more slowly than others.
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The principle of assembly of a two-pipe system
Features of the two-pipe schemes
The use of temperature controllers
Two-pipe scheme with lower wiring
Justification of investments in the device
Concealed piping
Hiding copper pipes
Double-pipe beam varinat
If you use a circulation pump or the distance between the first and last radiator in the circuit is negligible, then the effect of uneven heating during the dead end two-pipe wiring is invisible. Then the choice in favor of one or another option is due solely to considerations of the convenience of the return pipe.
Distribution manifold incorporation
Recently, a popular way of organizing water heating is the so-called “beam pattern” using a distribution manifold.
This wiring method reliably works only with good water pressure in the system, so it is not used for natural circulation.
Radial wiring involves connecting each heater (or a small group of them) directly to a distribution manifold that distributes hot and collects chilled water
Beam radiator connection system
The most uniform and controlled separation of the heat carrier flow by heating devices can be achieved using a distribution manifold.
The device includes two combs, in one of which hot water comes from the boiler and is distributed among the radiators, and the chilled water returns to the other and goes back to the boiler.
The radiators are connected through the distribution manifold in parallel, therefore, with this wiring, the minimum temperature difference of the coolant supplied to the heating devices is achieved.
This greatly facilitates the calculation of the parameters of radiators at the design stage, and also makes it easy to adjust the power of each device during operation.
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Heating system header
The principle of the collector type
The prevalence of two-pipe solutions
Specificity of the device of radiation systems
Laying heating pipes in the screed
Distribution comb air vents
Distribution comb in the bathroom
Homemade distribution comb
The second significant advantage of this wiring is the ability to control the flow of coolant to all devices from one place. The collector is placed in a special cabinet with access to indicators and controls: valves, taps and pumps.
This is convenient from the position of regulating the microclimate of the house and makes it easier to fit radiators into the interior of the room.
The disadvantages of systems with a collector scheme for heating distribution should include the maximum length of the pipes for supplying and discharging water to radiators. This option is the most expensive at the cost of the circuit elements and the most difficult to install, and also requires a certain qualification.
Using a collector to connect heating devices of various types requires a good understanding of the topic of water heating, and sometimes hydraulic calculations for the normal functioning of such systems
As a rule, pipes in the radial distribution of heating are mounted in the floor screed. This means that it is necessary to design and install such a system during the construction or overhaul of a private house.
It is quite difficult to make a collector version for connecting radiators or to change the geometry of circuits in rooms with internal repairs already carried out.This is the second significant minus of this type of wiring.
Rules for using underfloor heating
A comfortable and very popular way of heating residential premises is the arrangement of a warm floor. If the heated area is small, then you can get by with one pipe placed in the floor screed.
Connecting the underfloor heating system through the distribution manifold is the only option for heating large areas in this way
For large areas, the use of a single pipe is not possible for the following reasons:
- the amount of heat supplied is not enough to heat the entire room, in addition, this heating will be uneven;
- with a long length, there is a strong hydrodynamic resistance of the fluid flow, which leads to excessive energy costs for creating pressure and increases the risk of water breakthrough at the joints.
Therefore, with a large area of underfloor heating, the use of several pipes is not a wish, but a necessity.
In this case, the connection is made through a distribution manifold.
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Underfloor heating manifold
Distinctive features of the system
Metal-plastic and copper pipes
Pouring screed over the heating circuit
Often the collector is equipped with a mixing unit for adjusting the temperature of the water supplied to the underfloor heating pipes. The fact is that for radiators, as a rule, they use a liquid with a temperature range of 70-80 ° C, while for a warm floor, about 40 ° C is needed.
The temperature control through the mixer is reliable, which is very important, since an excess of temperature can cause a significant deformation of the floor covering: linoleum, laminate or parquet.
Schematic representation of the heating distribution in a two-story house with a large area. Two-pipe passing and deadlock system and underfloor heating connected via collectors. Elimination of the conflict of circulation pumps using a hydraulic arrow:
Radiation scheme for heating a two-story building. Since the finish has not yet been completed, the entire wiring is clearly visible. The nuances of laying pipes on the floor under a concrete screed:
The opinion of a practicing master in installing heating systems about the various schemes used in private homes. Overview of the pros and cons of natural circulation, single pipe, double pipe associated and dead end, as well as collector wiring:
Presented wiring for heating homes are typical and can be modified taking into account the geometry of the premises, the required temperature or other factors. When modifying schemes, it is necessary to comply with the laws and basic principles of physics, hydraulics, materials science and other disciplines.
In the case of solving complex or non-standard tasks, it is better to contact specialists, because reworking heating systems can come out even more expensive than their modeling and installation.
If you have any questions or have a desire to share personal experience in installing heating in your home, please leave comments on this article. You can supplement your review with a photo - the contact form is located below.