Heating, Air Conditioning, Ventilation and District Heating Networks in Accordance with Government Decree No. 87
Working documentation: from 22 days
Price from 50000 roubles
Section IOS 5.4 (formerly IOS4) is one of the most capacious and normatively complex subsections of project documentation: it combines four engineering disciplines - heating, ventilation, air conditioning and heating networks - and requires coordination of calculations between them at the DD stage, otherwise contradictions between systems are revealed during installation. AYU-Project is developing subsection IOS 5.4 in its entirety according to Decree of the Government of the Russian Federation No. 87 dated 16.02.2008 (rev. 2023): we design all four systems as a single engineering complex, perform a thermal balance of the building, hydraulic calculations of pipelines and heating networks, select equipment taking into account reliability and minimizing energy costs. SRO approval, normative control based on current editions of standards, fixed contract price and free edits based on comments from state and independent expert reviewers.
What is included in the development of subsection IOS 5.4 according to Government Decree No. 87?
Subsection IOS 5.4 “Heating, ventilation and air conditioning, heating networks” is mandatory for all capital construction projects and is being developed as part of Section 5 DD according to Item 15 and item 19 Part II Government Decree of the Russian Federation No. 87. The documentation includes a text part with calculations and justifications and a graphic part with schematic diagrams, plans and axonometric drawings of all systems.
Design documentation stage includes:
- An explanatory note describing the climatic conditions of the construction area SP 131.13330.2020, calculated parameters of external and internal air, heat supply sources and coolant parameters
- Information about heat supply sources, connection diagram to the heating networks of the heating supply organization, coolant parameters at the connection point (according to technical specifications)
- Description and justification of heating systems: type of heating devices, wiring diagram (single-pipe, two-pipe, radiant), coolant parameters, regulation
- Description and justification of ventilation systems: air exchanges, types of P/A/PV systems, heat recovery, aerodynamic calculations
- Description and justification of air conditioning systems: type of SCR, calculation of heat load, cooling supply diagram
- Description of the installation and design solutions of heating networks: installation method (underground, aboveground), diameters and thermal insulation of pipelines, compensation for temperature expansions
- Section of energy efficiency measures in terms of HVAC according to requirements Federal Law No. 261-FZ And Government Decree of the Russian Federation No. 18
- Schematic diagrams of all heating, ventilation, air conditioning and heating systems
- Plans for the placement of equipment and pipeline routes (heating networks) on the general plan and floor plans of the building
- Tasks for related sections: KR (equipment loads), EL (power, reliability categories), water supply and drainage (connection points GVS), ATKh (control algorithms)
The WD Stage Includes:
- Working drawings of heating systems: plans M 1:50, axonometric diagrams with diameters and slopes
- Working drawings of ventilation and air conditioning systems: plans for air ducts and refrigeration pipelines, axonometry, installation components
- Working drawings of heating networks: plans and longitudinal profiles of heating mains, diagrams of thermal chambers and pipeline assemblies, plan of an operational-remote control system (ODC) for underground installations
- ITP (individual heating point) project: technological diagram, layout, equipment specification (heat exchangers, pumps, pressure regulators, heat metering unit)
- Equipment and material specifications for all HVAC systems
- Automation and dispatch schemes: control algorithms for a boiler room or ITP, ventilation and air conditioning systems, signal tables for BMS
- Programs and methods commissioning for all systems of the subsection IOS 5.4
What does the IOS 5.4 subsection consist of and how do its parts differ?
Often the customer perceives IOS 5.4 as one section, although in practice these are four independent disciplines with separate calculations, drawings and regulatory framework. AYU-Project develops each of them as a complete team, maintaining the unity of the engineering concept.
| System | Basic calculation | Key standard | What is included in the DD |
|---|---|---|---|
| Heating (OT) | Building heat loss, hydraulics | SP 60.13330.2020, SP 50.13330.2012 | Wiring diagram, selection of devices, input node |
| Ventilation (VN) | Air exchanges, aerodynamics, acoustics | SP 60.13330.2020, SP 51.13330.2011 | P/V systems/PV, selection of installations |
| Air conditioning (SCR) | Heat load, cooling supply | SP 60.13330.2020, GOST 30494-2011 | Scheme AC system, selection of equipment |
| Heating networks and ITP | Network hydraulics, heating point | SP 124.13330.2012, SP 510.1325800.2022 | Diagram IHS, heating network route, metering unit |
The interdependence of the systems is already evident at the calculation stage: the coolant parameters in IHS set the heating mode, the power of the heaters of the air handling units and the temperature control schedule. That is why the development of IOS 5.4 by one team - and not by four different contractors - eliminates inconsistencies between sections and expert comments on mutual tasks.
For which facilities is IOS 5.4 being developed?
Subsection IOS 5.4 is mandatory for any capital construction project undergoing expert review. The composition of the systems included in the subsection is determined by the function of the object and its engineering program - the set of systems for a residential building, a shopping center and an industrial building is fundamentally different.
AYU-Project develops IOS 5.4 for the following categories of objects:
- Multi-Apartment Residential Buildings (MCD): central heating systems with IHS, apartment or centralized ventilation systems, distribution of heating networks throughout the territory
- Office and administrative buildings: two-pipe heating systems with automatic balancing valves, centralized PV ventilation systems, VRF or chiller-fan coil, heating networks up to IHS
- Shopping centers and shopping mall: air heating systems in sales areas, central air conditioners, emergency ventilation, multi-circuit IHS with heating, ventilation and GVS heat exchangers
- Industrial and warehouse buildings: air or radiant heating, emergency ventilation of categories A-D, technological air conditioning, heating networks of industrial districts
- Medical institutions: four-pipe fan coil systems, laminar operating room ceilings, heating systems with standardized surface temperatures of heating devices according to SanPiN 2.1.3678-20
- Reconstruction Projects: reconnection to heating networks, renovation of ITP with replacement of equipment and redesign of HVAC systems within the framework of the new technical specifications
What is ITP and why is its design critical for the entire IOS 5.4?
An individual heating point (IHP) is a unit for transferring thermal energy from a heat supply organization to the engineering systems of a building. Errors in the ITP design - incorrect selection of heat exchangers, pumps or pressure regulators - affect the operation of all connected systems: heating, ventilation and hot water supply simultaneously.
AYU-Project designs ITP as part of IOS 5.4 according to SP 510.1325800.2022 And SP 41-101-95 with the following composition:
- Connection diagram for consumption systems: dependent or independent (via a heat exchanger) heating circuit; open or closed DHW circuit depending on the parameters of the heating network of the heating supply organization
- Selection of heat exchangers: plate heat exchangers with calculation of thermal power for each circuit (heating, ventilation, GVS), taking into account the temperature curve of the coolant in the network
- Hydraulic calculation IHS: determination of pressure loss in a unit, selection of circulation pumps by pressure and performance, selection of pressure and flow regulators
- Thermal energy metering unit (heat metering unit): commercial heat meter with flow meters as required Order of the Ministry of Construction No. 1034/pr; selection taking into account straight sections before and after the flow meter
- Automation ITP: weather-dependent regulation of the temperature schedule, pump protection against “dry running”, integration into the building’s BMS
Typical HVAC and Heating Network Design Mistakes
The examination comments and complaints during the operation of buildings in the part IOS 5.4 are predictable - most of them are reproduced from project to project. AYU-Project excludes them due to a single team working in all disciplines of the subsection.
- Inconsistent coolant parameters between the IHP, the heating system and the heaters of the air handling units: if the heat exchanger of the IHP is designed for a temperature schedule of 80/60°C, and the heaters of the air handling unit are designed for 90/70°C, the ventilation system does not reach its design capacity during the design period
- Incorrect selection of the diameter of the flow area of the regulators pressure and flow in ITP: undersized diameter creates cavitation noise and unstable pressure in internal systems; overestimated - does not provide the standard difference
- Lack of balancing of heating systems - in branched two-pipe systems without balancing valves, near risers receive excess coolant, while distant risers receive insufficient coolant; the problem lies in DD and cannot be solved during installation without replacing the fittings
- Ignoring thermal expansion compensation on heating networks: pipelines when heated from 20°C to 130°C lengthen by 1,2 mm/m; without expansion joints or U-shaped hinges, the loads on the supports and flange connections exceed the permissible limits
- Lack of ODK system (operational remote control) for pipelines in PPU insulation for underground installation: SP 124.13330.2012 requires an ODK system to identify zones of insulation moisture without opening the soil
- Inconsistency between ventilation and heating zones in rooms with large glazed facades: air heating through air supply units requires an accurate calculation of the heat balance together with the heat transfer of radiators, otherwise some zones overheat, while others remain cold
Coordination and interaction with the heat supply organization
Development of IOS 5.4 is impossible without the initial permitting documentation of the heat supply organization (TSO) - technical conditions (TS) for connection and an approved load passport. AYU-Project accompanies the client at this stage from the first day.
Interaction with TSO and supervisory authorities includes:
- Preparation and submission of an application for obtaining specifications for heat supply: AYU-Project generates a package of initial data (calculated heat loads for heating, ventilation and hot water supply) based on preliminary calculations for the architectural part
- Analysis of the received technical specifications: checking the admissibility of the declared pressure and temperature schedule of the heating network for the applied IHS circuits and heating systems
- Development of an ITP project and coordination of the connection scheme with the TCO before submitting the DD for examination
- Responses to the examination comments on section IOS 5.4 regarding heating networks and ITP without additional payment
Why choose AYU-Project to develop IOS 5.4?
AYU-Project develops all four subsection systems within the framework of one contract: this guarantees the consistency of calculations between OT, HV, SCR and heating networks and eliminates mutual contradictions that are inevitable when several independent contractors work.
Specific benefits:
- SRO Design Authorization capital construction projects, including particularly dangerous and technically complex ones
- One team in all disciplines of IOS 5.4: the thermal balance of the building, the hydraulics of heating networks, the aerodynamics of ventilation and the calculation of SCR are carried out in concert - without gaps between contractors
- BIM design in Revit and MagiCAD: coordination of heating pipelines, air ducts and refrigeration piping with adjacent sections KR, water supply and drainage, EL eliminates installation collisions
- Fixed price contracts: the cost does not change during the development process
- Free Revisions in Response to Expert Review Comments: adjustments DD for all systems IOS 5.4 included in the contract
- Preparation and analysis of technical specifications heat supply organization - AYU-Project accompanies the customer from the stage of collecting initial data
What regulations govern the development of IOS 5.4?
The IOS subsection 5.4 covers four engineering disciplines, each of which has its own regulatory package. All documents are used in the current editions as of the date of development of the DD.
Current list of regulatory documents:
- Government Decree of the Russian Federation No. 87 dated 16.02.2008 (ed. 15.09.2023) “On the composition of sections of project documentation” - clause 19 part II regulates the full composition of the text and graphic parts of the IOS subsection 5.4
- SP 60.13330.2020 “Heating, Ventilation and Air Conditioning” (updated edition of SNiP 41-01-2003, with Amendments No. 1-5) - the basic set of rules for all HVAC systems: microclimate parameters, calculation of air exchanges, heat balance, equipment requirements
- SP 124.13330.2012 “Heating networks” (updated edition of SNiP 41-02-2003) - design of external heating networks: hydraulic calculation, installation methods, thermal insulation, compensation of elongations, UEC system
- SP 510.1325800.2022 “Heating points and internal heat supply systems” - requirements for the design of ITP and central heating substations, selection of heat exchangers, pumps, regulators and heat metering units
- SP 50.13330.2012 “Thermal protection of buildings” - characteristics of enclosing structures used in calculating heat losses and heat gains
- SP 131.13330.2020 “Construction Climatology” - calculated parameters of outside air and climatic data for thermal engineering and aerodynamic calculations
- SP 51.13330.2011 “Noise protection” - acoustic calculation of ventilation and air conditioning systems as part of IOS 5.4
- GOST 30494-2011 “Residential and Public Buildings. Indoor Microclimate Parameters” - standardized parameters of temperature, humidity, air speed in the service area
- SanPiN 1.2.3685-21 - hygienic standards for microclimate parameters and air exchange for residential, public and industrial buildings
- Federal Law No. 261-FZ “On Energy Saving” And Government Decree of the Russian Federation No. 18 dated 25.01.2011 - requirements for the section of measures to improve energy efficiency in terms of HVAC and heating networks
- Order of the Ministry of Construction No. 1034/pr “Rules for commercial metering of thermal energy and coolant” - requirements for the composition and installation of a thermal energy metering unit in IHS
Cost and development time for subsection IOS 5.4
The cost and development time of design documentation and working documentation for IOS 5.4 are determined by a combination of factors specific to the complex subsection:
- Composition of systems in the subsection - the presence or absence of external heating networks, ITP, air conditioning and smoke ventilation systems in the scope of IOS 5.4 fundamentally affects the labor intensity
- Object type and function - industrial, medical and retail facilities require an expanded range of calculations compared to residential or office buildings
- Length of external heating networks - every 100 m of the route, a full hydraulic calculation, longitudinal profile and specification of materials are added
- Availability of IHS or central heating substation - design of IHS with heat exchangers, metering unit and automation is an independent scope of work as part of IOS 5.4
- The need to obtain technical specifications from the heat supply organization - the timing of approval with TSO often determines the overall period for developing DD
- Design stage - only DD, only WD or combined development DD+WD
Approximate calculation - through the online calculator on the website.
To prepare an accurate commercial proposal, the application must indicate: the type and function of the facility, the presence of external heating networks and their approximate length, the presence of IHS, the composition of the HVAC systems (heating, ventilation, air conditioning or a complete complex), the design stage. The initial consultation is free, and we work across Russia remotely.
How to order the development of subsection IOS 5.4?
- Application Submission
Fill out the form on the website or send a request by e-mail, indicating the type of object, approximate area, availability of IHS and external heating networks. If you have architectural plans or technical specifications, attach them right away. - Initial consultation
The AYU-Project engineer clarifies the composition of the HVAC systems, the availability of connections to the heating network, requirements for ventilation and air conditioning, and the design stage. Consultation is free. - Preparation of a commercial proposal
AYU-Project forms CP with a fixed price, a list of systems and sections (OT, VN, AC system, heating networks, IHS), composition of DD and/or WD, deadlines for each stage. - Conclusion of an agreement
The contract fixes the price, terms, composition of documentation and the condition of free edits based on the expert’s comments. Advance - only after signing the contract. - Collection of Source Data
AYU-Project generates a checklist of initial data: architectural and construction part, technical specifications heat supply organization, tasks of related sections, climate data for SP 131.13330.2020, information on equipment and technological processes. - Development of DD and/or WD
AYU-Project engineers perform thermal, hydraulic, aerodynamic and refrigeration calculations, link all systems into BIM, and coordinate intermediate solutions with the customer. - Expert Review Support and Documentation Delivery
AYU-Project responds to the expert’s comments on section IOS 5.4 without additional payment, makes adjustments and submits the final set WD for work and commissioning.
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Frequently Asked Questions
Yes, this is a mandatory requirement of the Government Decree of the Russian Federation No. 87 (ed. 2022): the text part of the IOS 5.4 must contain a list of measures to ensure compliance with energy efficiency requirements in terms of HVAC and heating networks. AYU-Project is developing this section in accordance with Federal Law No. 261-FZ and Government Decree of the Russian Federation No. 18, including justification for the energy efficiency class of systems.
This is one of the most common situations during reconstruction: TSO issues specifications with a pressure or temperature schedule that does not correspond to the designed circuit. AYU-Project analyzes the specifications before the development of the DD and, if necessary, initiates coordination with the TCO to change the parameters or adjusts the ITP scheme to the existing specifications with minimal losses for the project.
The thermal energy metering unit is part of the ITP project, which is part of the IOS 5.4. The selection of the heat meter, flow meters and required straight sections is carried out in accordance with Order of the Ministry of Construction No. 1034/pr and is included in the WD specification.
Yes. PDV and SDU systems are designed as part of the same OV section as general ventilation. AYU-Project develops them under a single contract on IOS 5.4, ensuring consistency of SVI and SDU control algorithms when APS is triggered.
Yes, it's the same thing. Before the introduction of the latest edition of the Government Decree of the Russian Federation No. 87, the section had IOS numbering 4; in the current edition it is called subsection 5.4 Section 5. In practice, both designations are used as equivalent, and the AYU-Project accepts applications with any wording.
If major repairs affect engineering heating, ventilation or heating systems, design documentation for these systems is required. At the same time, the status of design documentation (with or without examination) is determined by the nature and scope of work. AYU-Project advises the client on this issue free of charge at the initial contact stage.
Weather-dependent regulation is an automatic change in the temperature of the coolant in the heating system depending on the outside air temperature according to a given temperature schedule. Without it, the building either overheats when the weather gets warmer (residents open windows, thermal energy is wasted), or loses heat when it gets colder. An ITP control regulator with a weather-dependent algorithm is required for buildings of energy efficiency classes B and higher.
Yes. AYU-Project develops both a complete subsection of Engineering Systems Section 5.4, and individual disciplines - heating, ventilation, air conditioning or heating networks design - depending on the task. If the facility already has a systems project, AYU-Project develops the missing sections and ensures they are consistent with existing documentation.
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