Calculation of heating in a private house is necessary to select a boiler, radiators, and connection diagrams in accordance with the specified operating conditions. In other words, in order to purchase and install the necessary equipment, you must first take into account heat loss in walls, ceilings, window units, determine comfortable humidity, temperature in each room with the ability to adjust the microclimate in a small range.

Calculation of the cost of heating a country house is provided to customers in the estimate documentation to adjust the budget for the construction of a heating complex for a cottage. When using additional heating systems (warm floors, air heaters, ceiling, wall IR heaters), it is possible to reduce the number of radiators and boiler power without changing the comfort of living.

At the initial stage, it is necessary to select an energy carrier:

• The solid fuel boiler has minimal automation of the process; the firebox has to be loaded manually, therefore, this equipment is selected in the absence of a centralized gas pipeline
• an electric boiler increases operating costs due to the high cost of energy, therefore, it is used as a last resort
• liquid fuel boilers are minimally environmentally friendly, the need to constantly replenish the fuel supply, and the associated difficulties of storing flammable substances

Thus, in 90% of cases, gas boilers are chosen, which are convenient to operate and economical to maintain. Modifications with closed combustion chambers can be placed in the kitchen and do not require a separate room with high-quality ventilation systems and separate exits.

The amount of the estimate at this stage depends entirely on the correct choice of heating equipment:

• a boiler that is too powerful will consume excess fuel
• insufficient power of the device will reduce the comfort of living

The heating system of a country house is calculated based on several characteristics:

• specific power of the heating device - recommended value for heating 10 square meters, marked in the formulas W y
• area of ​​premises – in the formulas used it is denoted by the Latin S

The calculation of water heating for a private house must take into account the climate of the operating region. For northern regions, W y is 2 – 1.7 kW, central 1.5 – 1.3 kW, southern 0.9 – 0.6 kW. The formula used for calculations is: W = S *W y /10. Therefore, with an average value of specific power for heating 100 square meters, boilers of 15 - 10 kW are usually selected.

In large-format rooms (from 100 square meters), the length of the circuits leads to a decrease in the coolant temperature, therefore, circulation pumps will be additionally required. With smaller areas, natural circulation remains quite effective.

The dimensions of the window openings do not affect the number of sections located under the window sills. Calculation of heating radiators for a private house is made in accordance with the characteristics of the selected type of sections. The technical characteristics of a cast iron, bimetallic, steel, ceramic, design radiator indicate heat transfer. This parameter is necessary for calculations:

• its value is divided by 100 to determine the amount of m2 that one section of the device is able to heat
• the area of ​​the room is divided by the resulting result
• the value is rounded up

For example, with a radiator power of 180 W, 14 sections will be required for a normal microclimate in a room measuring 24 square: 24/18 = 13.3 pieces. In corner rooms, rooms with loggias/balconies, heat loss increases, therefore, 3–2 sections are added to the resulting number of radiators.

The estimate for heating a private house, in addition to the boiler and radiators, includes:

1. pipes - depending on the piping scheme used
2. fittings – for connecting straight sections
3. shut-off valves - three valves near each radiator to increase the maintainability of the circuits

Estimate documentation is included in the project or drawn up independently. In the first case, professionals take into account all the nuances; in the second option, there are often errors, there are either not enough materials, or there is a reserve that unjustifiably increases the construction budget.

Estimate for heating installation

To install heating circuits for a cottage, you will need material, equipment, tools (if you make it yourself) or pay for the services of specialists when contacting the company. In any case, you will need an estimate for heating installation, which will allow you to adjust the budget.

There are free services on the Internet that allow you to do this yourself. However, the programs are complex for non-professionals; detailed familiarization with the help of videos and text instructions will be required.

The cost of a professional estimate in specialized companies traditionally amounts to 3–1% of the turnkey installation price. Many companies provide estimate documentation and measurements free of charge, as a bonus. Moreover, the quality is an order of magnitude higher than independent calculations:

• craftsmen have extensive experience
• have regular practice
• monitor price changes in the building materials market

Most often, the choice of materials from the manufacturer of the service provides an additional reduction in the budget - companies purchase it at wholesale prices from reliable suppliers, extending discounts to their clients.

The customer can only provide a technical specification with an accompanying sketch of the desired circuit layout or voice the requirements for the technical device and the planned interior design.

The rest of the drawings and calculations will be carried out by the company’s professionals, providing a preliminary estimate with a project planning plan, which indicates the timing of the work, for approval.

Prices for services

Examples of completed heating installation work in private houses

When calculating an estimate for the repair or replacement of a heating system, it is necessary to decide whether it will be a complete replacement of the entire system, or just radiators or heating pipes.

Estimate for replacement and repair of heating batteries

If the replacement of communication networks is carried out in an apartment in a residential building, then with any changes in the arrangement of electrical and plumbing equipment, it is necessary to make appropriate amendments to the technical specifications. passport of the entire residential building. But this does not apply to heating devices, so replacing them yourself is prohibited. But in a private house, the owner can easily replace the batteries himself.

You need to find out which radiators are best to choose.

1. Cast iron – they are not subject to corrosion and are very durable, but they are heavy.
2. Steel – very durable, have an attractive appearance, but are made of thin (1.5 mm thick) steel sheet, and therefore are sensitive to mechanical damage.
3. Aluminum – they are quite light in weight, look good, but do not involve contact of the coolant with other metals, and an air outlet is also required.
4. Bimetallic – have a steel core and aluminum fins, have high efficiency, and are at the same time quite durable and presentable.

Having decided on the type and brand of radiator, you should calculate the number of required radiator sections. It is calculated according to a simple formula - 1 section per 2 square meters. m. area of ​​the room. You can install spare ones, the number of which does not exceed 20% of the total, and each battery can be equipped with a separate throttle or thermostatic head.

It is also advisable to equip each radiator with a valve, with which you can completely disconnect the battery from the general circuit, and a valve that will allow you to direct the water flow through a shunt (bypass).

Radiators are replaced when there is no water in the heating system. New batteries are mounted on brackets and connected to the general system using ball valves. Connections are sealed using fiber or fum tape. The air from the radiators is bleed through the Mayevsky valve. It is necessary to check the tightness of all connections.

Prices for the installation of radiators, convectors, pipes, registers, mud traps, air collectors and air valves should be found in the collections on internal devices of heating systems GESN-18, FER-18, TER-18.

But prices for such work as dismantling old radiators, finned pipes, air heaters, convectors, as well as draining water, changing valves, valves, taps, cleaning and flushing radiators are contained in the collections GESNr-65-(15-27), FERr- 65-(15-27) and TERr-65-(15-27).

But if what is required is not a complete replacement, but only cleaning and flushing of the radiators with their subsequent installation in the old place, then it is advisable to use the prices of GESNr-65-22-(01-08), FERr-65-22-(01-08) and TERr-65-22-(01-08).

Prices for the materials used can be taken from the FSSC - a federal collection of estimated prices for materials, products and structures used in construction.

Replacing the heating riser

When replacing heating risers, you should also choose the right building materials, that is, pipes.

If you bet on the choice of pipes made of metal-plastic or reinforced polypropylene, you can get:

• ease of assembly and installation;
• light weight of products;
• ability to bend well, which is very useful when assembling on site.

But, at the same time, plastics wear out easily and may not withstand pressure surges of up to 20 atm that occur during water hammer.

Therefore, many builders now prefer to install galvanized steel pipes when installing risers and connections to radiator valves.

First, water is drained from the system, and this must be done by a mechanic from the housing department. If work on replacing risers is carried out in emergency mode, then everything is done completely free of charge.

Only after a complete descent can you begin to dismantle the old risers using a grinder. Then a thread is cut to screw in a new riser, or it is welded on. Afterwards, the new pipes are connected to the threads on the riser using couplings and sealed with silicone sealant or plumbing flax.

The next step is to install tees onto the threads, and valves are attached to them, and shut-off valves are attached to pipes with threads that are long at one end and short at the other. The jumpers are installed, and the radiator itself is connected last.

Finally, the air is bled and a trial run of the riser is performed.

All prices for replacing heating pipelines made of galvanized steel pipes with pipelines made of multilayer metal polymers, with a riser heating system, can be found in the collections GESNr-65-15-(05-07), FERr-65-15-(05-07), TERr -65-15-(05-07).

And replacement with similar pipelines, but made of galvanized steel, is better to be priced according to the prices of GESNr-65-15-(01-04), FERr-65-15-(01-04), TERr-65-15-(01-04 ). But some estimators recommend using prices for laying galvanized pipes with a diameter of 15 to 150 mm according to price collections GESN -16-02-002-(01-12), FER -16-02-002-(01-12), TER -16 -02-002-(01-12).

An example of an estimate for replacing a heating system and pipes

Download an example of an estimate for replacing the heating system and pipes -

Planning a budget for organizing heating and maintaining its performance is one of the priorities for the owner. It is the cost part that is the main limitation when choosing heating equipment and components. What is a heating system estimate for: installation, pressure testing, flushing, repair?

Rules for drawing up estimates for heating maintenance

It is almost impossible to foresee all costs to the nearest ruble when planning heating. But a correctly drawn up estimate for heating installation will help determine the approximate amount of costs.

To correctly formulate a list of current costs, a deep primary analysis and, in some way, marketing research of the market for services and materials is required. These activities should begin before purchasing equipment and components. The estimate for installation of a heating system includes the following items:

• Consumables and equipment– boiler, expansion tank, circulation pump, pipes, etc.;
• Installation cost– specialist services, adaptation of the house for heating installation;
• Preparatory work for testing and launching the system– filling with coolant, pressure testing, adjustment of control devices and safety groups.

In fact, the resulting estimate for heating a private home will consist of several documents - a description of installation costs, materials (equipment and components) as well as services for starting the heating supply. Despite the fact that you can do some of them yourself, it is recommended to take these costs into account.

Structurally, a sample heating estimate should consist of the name of the costs, a description of their characteristics and features, the cost per unit, the required quantity and the total amount.

A separate document must be drawn up for each type of work. Thus, the estimate for pressure testing of the heating system will include unique measures unique to this procedure. Therefore, it is recommended to first familiarize yourself with the nuances of drawing up estimates of various types.

To draw up an estimate, you can use any standard form. It is only important to decide on its content – ​​the list of materials and services.

Installation estimate for heat supply

This selection of components for the future heating system is one of the most important. In practice, problems begin at the stage of selecting the main components of the system - the boiler and radiators.

In an effort to save as much as possible, the cheapest models are purchased. However, their nominal characteristics do not correspond to the calculated ones. As a result, this leads to a significant decrease in system efficiency.

How to avoid such a situation? It is necessary to correctly calculate the costs of organizing heat supply. To do this, you will need an estimate for the installation of heating and the purchase of components. Its correct compilation is only possible if you follow these recommendations:

1. Calculation of heating depending on the current parameters of the building (heat losses), type of energy carrier (gas, solid fuel, diesel, etc.). The required heating power for each room in the building is also calculated.
2. Based on the data obtained, a list of equipment is compiled - heating boiler, radiators, safety group (air vent, expansion tank, thermostats) and pipelines. The type of the latter largely influences the heating installation estimate. Polymer lines can be installed independently, while steel lines are installed with the help of specialists.
3. Market monitoring is carried out, as a result of which heat supply components that are optimal in cost and technical characteristics are selected.
4. The cost estimates for the installation of the heating system are filled in: the cost of equipment, transportation costs and installation work.

Accepted samples of heating estimates may have different formats. The main thing is that it is convenient for the compiler to fill them out and subsequently use them as the main financial document for planning purchases.

When involving third parties (organizations) in the installation of heating, it is necessary to agree in advance on all items of the estimate in order to avoid further inconsistencies, both financially and technically.

Formation of estimates for heating system maintenance

What is the difference between an estimate for repairing a heating system and a document for installation work? First of all, at significantly lower costs. However, in this case, special attention must be paid to the selection of consumables. They must be adapted to the current system. First, an analysis of future repair costs is performed. To do this, the area of ​​the heat supply problem is determined and materials are selected to eliminate it. Unlike estimates for heating installations, consumable components cannot have a wide range. So, for chemical flushing of pipes it is necessary to use a special liquid, finding an analogue of which will be problematic.

In general, when creating an estimate for repairing a heating system, you should be guided by the following rules:

• The technical and operational parameters of the replaced components must fully correspond to the old ones that are out of order. For example, when replacing a piece of plastic pipe, you should choose the same one, made of a similar material and having the same geometric dimensions;
• In addition to the cost of new components, an estimate for their installation in heating is filled out;
• Transportation costs and services of repair specialists must be taken into account.

Often, repair estimates for the heating of a private home contain components that are purchased “in reserve.” A specialist can identify “weak” points in the heating supply and advise you to buy the most necessary components to carry out prompt repairs.

Drawing up an estimate for the restoration of the heating system is most often carried out after the repairs have been completed. To fill it out correctly, you should keep a draft version of the document, which indicates all services and materials.

Estimate for flushing pipes and heating radiators

The heating supply must be cleaned of accumulated dirt and limescale deposits at least once every 3-4 years. This depends on the composition of the coolant and the material used to make the radiator pipes. For steel models, the frequency is less, since a corrosion layer is formed on their inner surface.

A correctly formed estimate for heating flushing directly depends on the chosen technology. When chemical cleaning occurs, most of the costs will be the special composition. For a hydraulic system, the estimate for flushing the heating must indicate the cost (rent) of the apparatus to perform this work.

Features of filling out this type of document include the following:

• The costs of analyzing the degree of contamination of the pipeline and radiators must be taken into account. Without this, the estimate for cleaning the heating will not be complete;
• After all preventive measures have been completed, the current state of the system is checked;
• The costs of disposal of contaminated liquid are taken into account. If the work is performed by a specialized company, this item is most often not indicated in the flushing estimate for the heat supply of a private house.

A separate category of work is flushing the boiler heat exchanger. Just as when filling out an estimate for installing a heating system, additional costs will include work on disassembling and assembling the heating device. It is not recommended to flush the heat exchanger using a flow method.

For greater efficiency, it is necessary to clean the entire heating system, and not its individual parts. This will increase the cost, but will also significantly increase the efficiency of the system.

Estimate for pressure testing of heat supply lines

After installation, repair work or before filling the system, it is necessary to perform a pressure test. Its meaning is to create excess pressure inside pipes and radiators (1.25 times higher than nominal) to search for a possible break and check the tightness of the entire heating supply.

The estimate for pressure testing of the heating system must indicate the type of work performed. It can be carried out hydraulically or by air. It is preferable to choose the first one, since with its help it is easier to identify microcracks or incorrectly installed fittings.

Cost calculation turnkey heating systems with an area of ​​300 sq.m. with weather-compensating automation and an outside temperature sensor.

Boiler room with weather-compensating automation and outside temperature sensor

Estimate for installation of boiler equipment, radiator heating system, "Warm Floor" system, boiler, hot water recirculation

We present this calculation cottage heating costs with only one purpose, so that you get acquainted with our prices for heating installation and place an order for the supply of equipment and heating installation work from us. You can also see the cost of heating system work on another page "". An example is given there home heating costs 450 m2.

How to make the calculation correctly? How to buy heating? Of course, you need to familiarize yourself with the calculation of the heating system (which is given below). It consists of the cost of boiler equipment plus the cost of radiators, pipes, fittings, shut-off valves. We add it all up and it turns out cottage heating cost heating installation cost heating installation cost.

Free heating system calculation!

But plumbing work in the house does not end with heating. It is necessary to install both water supply and sewerage. Below we provide prices for heating work, as well as the cost of water supply and sewerage.

Heating prices

Basic boiler equipment

Boiler room equipment for heating systems

1 Radiator heating mixing circuit

Heated floor mixing circuit

DHW pumping circuit

Equipment for hot water supply system

Equipment for hot water recycling

Equipment for a radiator heating system at home

Number of radiators - 18 pcs.

Number of risers - 2 pcs.

№ p.p.	Name	Unit change	Col.	Price, ye.	Price, ye.
1	Steel radiator Kermi FKO220504	PC.	3	56	168
2	Steel radiator Kermi FKO220505.	PC.	4	71	284
3	Steel radiator Kermi FKO220506	PC.	4	74	296
4		PC.	3	89	267
5	Steel radiator Kermi FKO220510	PC.	1	101	101
6	Steel radiator Kermi FKO220511.	PC.	3	110	330
7	Angle valve 1/2".	PC.	18	6,1	109,8
8		PC.	18	5,44	97,92
9	Combination corner with transition to metal 20x1/2".	PC.	18	1,9	34,2
10	Pipe PN-25 d.40.	linear m.	16	5,16	82,56
11	Pipe PN-25 d.32.	linear m.	76	2,87	218,12
12	Pipe PN-25 d.25.	linear m.	108	1,84	198,72
13	Pipe PN-25 d.20.	linear m.	65	1,25	81,25
14	Energoflex insulation d.42/9.	m.	16	39	624
15	Insulation Energoflex d.35/9.	linear m.	76	34	2 584
16	Insulation Energoflex d.25/9.	m.	108	29	3 132
17	Insulation Energoflex d.22/9.	linear m.	65	24	1560
18	Fittings (angles, couplings, tees, contours, transitions), consumables.	set	1	155	155
Total equipment and materials. ye					2423,57
Total equipment and materials. rub					7900
Installation of heating system (radiators).		PC.	18	3 800	68400

How to buy heating? Of course, you need to familiarize yourself with turnkey heating cost calculation(which is given above). It consists of the cost of boiler equipment plus the cost of radiators, pipes, fittings, shut-off valves. We add it all up and it turns out cottage heating cost. And of course we must add to this heating installation cost. But if you already have materials for heating your home, then you just need to familiarize yourself with heating installation cost.

But plumbing work in the house does not end with heating. It is necessary to install both water supply and sewerage. Below we present the cost of water supply and sewerage, along with installation and plumbing work.

Piping in bathrooms and kitchens.

Number of bathrooms - 1 pc.

Number of plumbing fixtures - 9 pcs.

Number of heated towel rails - 2 pcs.

Number of fan risers - 1 pc.

Sewerage

General estimate

General estimate for a cottage 300 m2

Home heating calculation (economy class)

The house is wooden, two-story.

Equipment for a radiator heating system for a house S = 140 sq.m.

Number of radiators - 11 pcs.

Number of risers - 2 pcs.

Specification of equipment and materials for the boiler room.