Price fer installation of a ventilation duct. An example of an estimate for ventilation and air ducts

In all the variety of calculations and calculations compiled at state prices, estimates for ventilation and air conditioning systems (including drugs and CS for their repair, maintenance, commissioning and design) do not play such a significant role, despite the fact that they can differ significantly. On the Internet, you can find quite a few examples of estimated ventilation calculations compiled in the Grand Estimate or other software systems. Between themselves, these samples of estimates differ, first of all, in the functional purpose and selection of the work performed: ventilation repair usually includes prices for dismantling and replacement, and installation of ventilation systems - prices from assembly collections. Another classification criterion may be the type of installed systems, for example, the calculation for supply and exhaust ventilation or the installation of air conditioners of a particular type.

If we talk about government prices used in the preparation of estimates for ventilation and air conditioning, then the most comprehensive and important collection is, perhaps, the GESN in part 20, which gives a clear idea of ​​​​the materials and technologies used during installation, repair or maintenance. When marking the installation of ventilation and air conditioning systems at territorial and federal prices (FER), the estimator takes into account the cost of the equipment to be installed in the estimate in a separate line (according to the price list or price bulletin), unless, of course, this is already included in the price. So, in part 20 of the collections there are prices for the installation of radial and axial fans, and the cost of the first is included in the price, and the second is not. In the course of ventilation work, the project quite often requires the installation of air ducts made of aluminum, sheet and galvanized steel of various thicknesses, the installation of which is also carried out according to the specifics of the technologies used. From the same part, you can take prices for the installation of various types of cooling systems: ejection air conditioners, closers, air heaters and receiving units.

For the installation of fans and air conditioners, a collection of prices for installation work is often used in Part 7, which discusses the algorithm for calculating material and labor costs for these types of work. As a rule, only the costs of auxiliary materials and the costs of personnel and machine operation are taken into account in assembly collections. The cost of installed fans and other equipment is taken into the estimate from the price list or invoice minus VAT and with the addition of transport and procurement costs. As an example, consider the estimate for ventilation, compiled using the Grand Estimate PC, at base prices per unit of work performed.

A sample of budgeting for ventilation work in TER-2001 Krasnodar

Explanations for example.

This sample contains prices for the installation or dismantling of equipment without specifying specific brands or close analogues from the collection of basic prices (TSSC) of the Krasnodar Territory. If the price does not take into account the cost of materials and equipment, they must be added to the estimate in a separate section or after the prices for installation or repair.

The specified list of prices is presented as an example of valuation of ventilation works in unit prices at the prices of the base period. According to the technical conditions of a particular project, a list of direct or applicable prices is selected, as well as coefficients that take into account the conditions for the production of construction and installation works. Based on the results, a correctly drawn up estimate for ventilation and air conditioning is close to the cost of installation and repair of these types of equipment and helps to determine the costs of the work performed even before the start of their implementation.

An example of an estimated calculation for ventilation - installation

Download an example estimate for installation work on ventilation systems, incl. laying of air ducts, installation of ventilation equipment and automation devices.

What kind of work can include an estimate for the installation of ventilation? What are the norms for the consumption of auxiliary materials and the cost of man-hours? Are there any standards for these costs? In our article we will try to answer these questions.

List of works

First, let's decide what works can be included in the estimate.

Main

1. Project development and preparation of project documentation.

Note: the project must be substantiated with calculations confirming its performance and the absence of performance redundancy of the designed system.
Obviously, the customer is interested not only in efficiency, but also in saving their own money.

1. If necessary, dismantling of the old ventilation system, partial dismantling of partitions, punching shafts in ceilings.
2. Installation of air ducts, air intake and supply hoods and grilles.
3. Installation, heaters, air conditioning systems etc.
4. A separate item is an estimate for commissioning work on ventilation.

Auxiliary

In addition to the actual installation and dismantling, the contractor will have to:

• Transportation of materials and equipment.
• Loading and unloading operations (including the use of equipment, the work of which is paid separately).
• Construction of temporary sites, scaffolding, etc.
• In the absence of a stable power supply at the time of commencement of work, the supply of the construction site with its own generation of electricity.

Regulations

There are two documents that are helpful in budgeting:

1. State elemental estimated norms (GESN), section 20. They allow you to assess the need for resources (the same man-hours, the duration of the equipment, the number of rivets, etc.).

1. Federal Unit Rates (FER) section 20. This contains the estimated price for each work performed during the installation or dismantling process. Rates are advisory in nature.

Note: in addition to FER, there are also Territorial unit prices (TER), compiled taking into account the specifics of local conditions (logistics, road conditions, seasonal temperatures, etc.).
Both FER and TER can be used as justification for budgeting.

Here are short excerpts from both documents.

GESN

According to this document, for laying an air duct with a total wall area of ​​100 m2 with a wall thickness of 0.5 mm and a diameter of up to 200 mm, the following resources will be required:

FER

And here are the estimated costs, on the basis of which the local estimate for ventilation is compiled, from the Federal unit prices of 2001. The same air duct with a wall thickness of 0.5 mm, an area of ​​​​100 m2 and a diameter of up to 200 mm will serve as a model for us.

To clarify: the materials included in the project are a separate item of expenditure.
Unaccounted for materials are, for example, the replacement of a welder's mask with an accidentally crushed glass or an adjustable wrench broken when tightening the flanges.
Since most of the installation work is done by hand, using hand tools, the human factor will be the main item of unaccounted for costs.

Sample

We hope that the instructions for drawing up estimates are generally understandable to the reader. Now let's study the sample. An example for us is the estimate of the ventilation device, compiled by the Moscow company Smeta-Moscow; due to the limited volume of our material, we will give only a small excerpt from its text.

Calculation of the cost of construction work is one of the most important parts of the entire project. Because the estimate helps to determine the amount of expenses necessary for all construction and installation works, on which the contractual price between the customer and the contractor is based.

Types of estimates

If we consider the entire block of construction and installation works, then the estimates covering all facilities under construction are called "summary". And the estimates, which reflect the cost of one object or type of work, are respectively called "object" or "local". The object estimate includes several local ones, and it is the main source for calculating the cost of work under a contract for the construction of an object.

Estimates for the installation of ventilation can be classified as local, because a separate ventilation and air conditioning system is designed for each facility under construction. This applies to both public and private buildings and structures, and industrial facilities.

The estimate differs from the estimate calculation in that when calculating the scope of work, and, consequently, the costs will still be specified during the development of working documentation or during the construction process.

How should the estimated cost of work be calculated

The cost for certain types of construction work is determined by the formula:

Ssmr \u003d PZ + NR + PN, where

• PZ - direct costs;
• HP - overhead;
• PN - planned savings.

Direct costs

They include:

• workers' wages;
• The cost of materials and structures used;
• Expenses for the operation of the necessary machines and mechanisms.

The salary is calculated according to the formula З=ТхЗmonth/t, where

• T - labor intensity of work, that is, the cost of living labor per unit of time, it is determined according to the standards, in man-hours;
• Zmes - the average monthly wage of one worker, in rubles;
• t is the average monthly working time, in hours;

The cost of the materials used is determined by multiplying the material consumption rate by the current price.

And the operating costs for the use of machines and mechanisms are calculated by multiplying the rate of time for using this technique (in machine hours) by the price of one machine-hour, which is also calculated using the following formula:

Tsmash-hour = (Zed + Zgod + Zex) xKnr, where

• Zed - one-time costs, that is, the costs of transporting goods by trucks, and their unloading and loading, in rubles / car-hour;
• Zgod - annual costs, that is, depreciation;
• Zex - operating costs, that is, the salary of mechanical workers for servicing machines, as well as the cost of fuels and lubricants, electricity consumed, etc.;
• Кнр - coefficient of overhead costs.

Overheads

These are costs aimed at the smooth functioning, management and organization of construction. They are defined in several ways:

• Through percentages of direct costs fixed in federal overhead regulations;
• According to the standards in force in a particular construction organization;
• Based on aggregated indicators.

Planned savings

Or estimated profit . These are expenses that are not directly related to construction work, but ensure the functioning of the construction site. These are tax deductions, expenses for the development of production, for material incentives, etc. It is calculated based on regulatory documents. Most often it is 12% of the total cost of construction and installation works or 50% of the wages of employees.

The main methods for calculating estimates

There are several types of them:

• resource - this method allows you to calculate the estimated cost at a given point in time, by basing on current prices for the costs of labor, materials and equipment, the operation of machines and mechanisms;
• resource-index - it involves additional indexation of construction costs, based on the base cost;
• basic-index - this method is not similar to the resource-index method in that it involves multiplying the basic cost of each budget item by the corresponding index, only after that the total amount is calculated;
• basic compensatory - using this method, the problem of cost estimate is solved, when the base cost can change, taking into account the current prices and tariffs during the construction process.

How to calculate estimates for ventilation and air conditioning

Let's proceed directly to the preparation of estimates for ventilation and tell you which collections of prices are best used for certain types of work.

Any professional estimator knows that repair work should be considered based on the prices for the dismantling and replacement of equipment, and the installation of ventilation. systems - at prices from collections of prices for installation.

As the main collection of state prices for the installation, repair and maintenance of ventilation systems, the collection of State elementary estimated norms (GESN), its 20th part, should be considered.

The estimator can also choose as a basis the 20th part of the territorial and federal prices for ventilation work (TER and FER), however, in this case, it is better to include the cost of materials and equipment in a separate line or price list.

For the installation of fans, pumps and compressor units, a collector GESNm-07, FERM-07 is used. And for commissioning of ventilation and air conditioning systems, GESNp-03, FERM-03 are needed. Prices for dismantling of ventilation shafts, ducts, air ducts and fans are contained in the collections GESNr-65, FERr-65.

Stages of installation of ventilation systems

For the correct marking of the work on the installation of ventilation, it is necessary to clearly distinguish between all stages of installation.

Installation of the ventilation system is divided into:

• Inspection of the ventilation system;
• Dismantling the old ventilation system (if it is repair work);
• Assembly of a new ventilation system - air ducts, filters, insulation;
• Installation of supporting structures and final equipment;
• Installation of automation systems;
• Commissioning and testing of the installed system.

Consider all types of installation work separately.

Ventilation survey

Examination of the ventilation system to search for various defects is carried out with a special visit of a specialist to the facility. The engineer performs an initial inspection of channels and chimneys, as well as a sanitary and epidemiological visual inspection. After that, a report is made on the results.

The base prices for the inspection of all engineering networks are contained in the Soviet price collections of the SPC from 1990. Appropriate coefficients should be applied to them. But there is a lot of controversy regarding the new editions of prices, and each construction company sets them individually.

Dismantling of ventilation

To begin with, a thorough examination is necessary to identify a non-functioning node. And then calculate what work needs to be done, and what materials to spend to replace the defective part of the system. Only after these calculations it is possible to calculate the price of dismantling.

But if a complete demolition of the entire old ventilation system is required, then the price of dismantling will differ significantly from the price of replacing one or more nodes. After all, a complete disassembly of ventilation shafts, air ducts, fans, exhaust pipes and louvres will be required.

The cost of these works can be found in GESNr-65-(28-32) and FERr-65-(28-32). The price of dismantling should also include cleaning and removal of the resulting construction debris.

Regarding the reduction factors to the direct costs of dismantling, guided by MDS-37 clause 3.2, we can say that:

• if the dismantled equipment is subject to subsequent use, with removal from the site, disassembly and conservation for storage, then the coefficient will be 0.7;
• if the equipment is to be used, but not stored, the coefficient will be 0.6;
• if the equipment is not to be used, with disassembly and cutting into pieces, the coefficient is 0.5;
• it is the same, but without disassembly, for release - 0.3.

Supply ventilation installation

The supply ventilation system consists of an extensive network of air ducts and an air supply unit. Air is supplied to the room after passing through the cleaning, humidification, cooling, or heating systems. This is done through the use of various air ducts, filters, fans, coolers, and heaters.

First, air ducts are laid and supply chambers are installed, and then supply units, brackets for ventilation equipment are mounted, louvre and ventilation grilles are installed, as well as air heaters or water heaters. The cost for these types of work can be found in the collections of prices GESN-20-(01-06), FER-20-(01-06) and TER-20-(01-06).

After that, it is necessary to mount an automation system that will allow you to control the installation by adjusting the temperature and air flow. This issue will be discussed further.

Exhaust ventilation

Ventilation systems operating on the exhaust principle are mounted on a large number of objects, such as various enterprises, retail and office premises, and residential buildings. They are designed to remove various pollutants from the air - smoke, burning, soot, dust, steam, etc. The simplest example is an extractor fan installed in the kitchen or bathroom to clean the room from soot, moisture and unpleasant odors.

Installation of exhaust complexes is carried out in two ways: either a local system - for each room, or a general system - for all rooms. It is considered advantageous to install local exhaust systems, which are divided into semi-open and open. In semi-open systems, exhaust air is removed by means of exhaust hoods. And in the open, side suctions are used.

The easiest way to install general exchange ventilation systems is to install axial fans.

For better air suction in industrial premises, ventilation shafts used for exhaust are usually laid under the floor.

Prices for the installation of passage units for exhaust ventilation shafts, umbrellas, deflectors and other equipment can also be found in the collections GESN-20-(01-06), FER-20-(01-06) and TER-20-(01-06).

Supply and exhaust ventilation complex

This type of ventilation has proven itself in large industrial facilities and institutions. For this purpose, special equipment is being installed, with the help of which it is possible to artificially stimulate the circulation of air in the room, and with the help of diffusers there is a uniform distribution and movement of air flows.

The set of equipment for this type of ventilation includes noise suppressors, vibration isolators, filters, heaters, air-heating and dust-collecting units, since due to their work not only cleaning and cooling occurs, but also air is heated.

At large facilities, it is justified to use such components of systems operating on the principle of supply and exhaust, such as recuperators that save energy consumption, as well as humidifiers, dehumidifiers and air coolers, etc. As in the previous sections, prices for these types of work should be sought in the GESN, TER and FER, chapter No. 20 and GESNm, TERm and FER, chapter No. 07.

Ventilation automation

The simplest options for automation systems are designed to control air temperature and fan speed. They can also protect heaters from overheating and freezing at extreme temperature levels.

And the current automation systems for regulating and controlling ventilation allow timer operation, and also have a connection to the “smart home” system. They are equipped with a control panel and a screen that displays all the information regarding the functioning of the system.

Such systems are often installed by contractors on a turnkey basis and equipped with electrical panels to control the operation of the units.

Commissioning works of ventilation systems

After installation of the ventilation system, it is necessary to carry out commissioning work to put the system into operation. This is an absolutely necessary stage of work, which allows you to identify and eliminate the shortcomings of the installation of the entire ventilation system.

To do this, a test run of the ventilation system is carried out and the equipment is examined for compliance with its nominal parameters. The quality of installation is also checked and final certification is carried out.

Prices for commissioning carried out after the installation of ventilation systems can be found in the collections GESNp-03, FERp-03 and TERp-03.

What specific work may include an estimate for the installation of ventilation? What are the norms for the consumption of ancillary costs and materials of man-hours? Are there any standards for these costs? In our article we will try to answer these questions.

List of works

To begin with, we will determine which specific works can be included in the estimate.

Main

1. drafting and development of project documentation.

You see: the project must be substantiated with calculations confirming its absence and the performance of the redundant performance of the designed system. Of course, the client is interested not only in efficiency, but also in saving his own money.

1. If necessary - dismantling of a dilapidated ventilation system, partial dismantling of partitions, punching shafts in ceilings.
2. Installation of air ducts, air intake and grilles and supply hoods.
3. Installation of fans, filters, heaters, air conditioning systems etc.
4. A separate item is an estimate for commissioning work on ventilation.

Auxiliary

In addition to the actual dismantling and installation, the contractor will have to:

• equipment and Transportation of materials.
• Loading and unloading operations (as well as using equipment, the work of which is paid separately).
• Construction of temporary sites, scaffolding, etc.
• In the absence of a stable power supply at the beginning of work, the supply of the construction site with its own generation of electricity.

Regulations

When drawing up an estimate, two documents are needed:

1. National elemental estimated norms (GESN), section 20. They allow you to estimate the need for resources (the same man-hours, the duration of the equipment, the number of rivets, etc.).

1. Federal Unit Rates (FER), section 20. This contains the approximate cost of each work done during the installation or dismantling. The quotation is a recommendation.

You see: in addition to FER, there are also Territorial unit prices (TER), compiled taking into account the specifics of local conditions (logistics, road conditions, seasonal temperatures, etc.). Both FER and TER can be used as justification for budgeting.

Here are short excerpts from both documents.

GESN

In accordance with this document, for laying an air duct with a non-specialized wall area of ​​100 m2 with a wall thickness of 0.5 mm and a diameter of up to 200 mm, the following resources will be required:

FER

And here are the estimated costs, on the basis of which the local estimate for ventilation is compiled, from the Federal unit prices of 2001. An example is the same air duct with a wall thickness of 0.5 mm, an area of ​​​​100 m2 and a diameter of up to 200 mm.

To clarify: the materials included in the project are a separate cost item. Unaccounted for materials are, for example, the replacement of a welder's mask with an accidentally crushed glass or an adjustable wrench broken when tightening the flanges. Because most of the installation work is done by hand, using hand tools, the anthropogenic factor will be the main item of unaccounted for costs.

Example

We hope that the instructions for drawing up estimates are generally understandable to the reader. Now let's study an example. An example for us is the estimate of the ventilation device, compiled by the capital company Smeta-Moscow; due to the limited volume of our material, we will give only a small excerpt from its text.

Conclusion

We hope that our material will help the reader to navigate in the preparation of estimate documentation. As in most cases, it is possible to find additional data in the attached video in this article. Good luck!