EN 13384-2:2015/prA1

Chimneys - Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving more than one heating appliance

This part of EN 13384 specifies methods for calculation of the thermal and fluid dynamic characteristics of chimneys serving more than one heating appliance.
This part of EN 13384 covers both the cases, either
a)   where the chimney is connected with more than one connecting flue pipe from individual or several appliances in a multi-inlet arrangement; or
b)   where the chimney is connected with an individual connecting flue pipe connecting more than one appliance in a cascade arrangement.
The case of multiple inlet cascade arrangement is covered by the case a).
This part of EN 13384 deals with chimneys operating under negative pressure conditions (there can be positive pressure condition in the connecting flue pipe) and with chimneys operating under positive pressure conditions and is valid for chimneys serving heating appliances for liquid, gaseous and solid fuels.
This part of EN 13384 does not apply to:
-   chimneys with different thermal resistance or different cross-section in the various chimney segments. This part does not apply to calculate energy gain;
-   chimneys with open fire places, e.g. open fire chimneys or chimney inlets which are normally intended to operate open to the room;
-   chimneys which serve different kinds of heating appliances regarding natural draught, fan assisted, forced draught or combustion engine. Fan assisted appliances with draught diverter between the fan and the chimney are considered as natural draught appliances;
-   chimneys with multiple inlets from more than 5 storeys. (This does not apply to balanced flue chimney.);
-   chimneys serving heating appliances with open air supply through ventilation openings or air ducts, which are not installed in the same air supply pressure region (e.g. same side of building).
For positive pressure chimneys this part only applies if any heating appliance which is out of action can be positively isolated to prevent flue gas back flow.

Abgasanlagen - Wärme- und strömungstechnische Berechnungsverfahren - Teil 2: Abgasanlagen mit mehreren Feuerstätten

Conduits de fumée - Méthodes de calcul thermo-aéraulique - Partie 2: Conduits de fumée desservant plus d'un appareil de chauffage

Dimniki - Računske metode termodinamike in dinamike fluidov - 2. del: Dimniki za več kot eno ogrevalno napravo

General Information

• Status: Not Published
• ICS: 91.060.40 - Chimneys, shafts, ducts
• Technical Committee: CEN/TC 166 - Chimneys
• Drafting Committee: CEN/TC 166/WG 2 - Thermal and fluid dynamic calculation methods for chimneys
• Current Stage: 4097 - End of interruption of work - split/merged
• Start Date: 10-Apr-2019
• Completion Date: 14-Apr-2025
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/105 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on chimneys, flues and specific products
• Ref Project: SIST EN 13384-2:2015/oprA1:2018 - Chimneys - Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving more than one heating appliance

Relations

• Merged Into: EN 13384-2:2015+A1:2019 - Chimneys - Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving more than one combustion appliance
• Effective Date: 19-Jan-2023
• Amends: EN 13384-2:2015 - Chimneys - Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving more than one heating appliance
• Effective Date: 14-Jun-2017

Overview

EN 13384-2:2015/prA1 - Chimneys: Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving more than one heating (combustion) appliance (CEN) sets out standardised calculation procedures for the thermal and fluid-dynamic behaviour of chimneys that serve multiple appliances. The standard covers both multi-inlet arrangements (several connecting flue pipes into one chimney) and cascade arrangements (one flue pipe connecting more than one appliance). It applies to chimneys operating under negative and positive pressure, and to appliances burning liquid, gaseous and solid fuels.

Key topics and requirements

• Scope of calculation methods
  • Thermal performance and fluid-dynamic (draught / flue gas flow) calculations for multi-appliance chimneys.
  • Accounts for simultaneous operation of appliances at different loads.
• Configurations covered
  • Multi-inlet (multiple flue pipes into one chimney).
  • Cascade arrangement (single flue pipe connecting multiple appliances).
• Pressure regimes
  • Methods for chimneys under negative pressure; also includes positive pressure chimneys (with specific isolation requirements).
• Fuel types
  • Valid for liquid, gaseous and solid fuel appliances.
• Exclusions and limitations
  • Not applicable to chimneys with varying thermal resistance or varying cross-section across segments.
  • Excludes open fireplaces and chimneys intended to operate open to the room.
  • Not for chimneys serving mixed appliance types (natural draught, fan-assisted, forced-draught, combustion-engine) unless treated per the standard’s definitions (fan-assisted with draught diverter may be considered natural draught).
  • Excludes chimneys with multiple inlets across more than five storeys (except balanced flue chimneys).
  • Not for appliances with open-air supply in different pressure regions.
  • For positive-pressure systems, any out-of-action appliance must be positively isolated to prevent backflow.
• Amendment A1 highlights
  • Terminology change: “heating appliance” → “combustion appliance”.
  • Clause updates regarding positive pressure cases, combustion air terminology, and addition of a specification table (Table B.3) for gas-fired boilers Type C.

Practical applications

• Designing and sizing chimneys for residential and multi-appliance commercial installations.
• Performing safety and compliance calculations for multi-appliance flue systems.
• Predicting flue-gas temperatures, draft, and flow distribution when appliances operate in combination.
• Avoiding backflow and ensuring correct isolation arrangements for positive pressure scenarios.

Who should use it

• Chimney and flue system designers and engineers
• HVAC and heating system consultants
• Chimney manufacturers and component suppliers
• Building services engineers, installers, and conformity assessors
• Regulatory bodies and certification agencies

Related standards

• EN 13384-1 (calculation methods for single-appliance chimneys) - consult for single-appliance baseline methods.
• National building and combustion appliance installation standards and codes of practice (refer to local regulations for implementation).

Keywords: EN 13384-2:2015/prA1, chimneys, thermal calculation, fluid dynamic calculation, multi-inlet chimney, cascade arrangement, chimney design, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2018
'LPQLNL5DþXQVNHPHWRGHWHUPRGLQDPLNHLQGLQDPLNHIOXLGRYGHO'LPQLNL]D
YHþNRWHQRRJUHYDOQRQDSUDYR
Chimneys - Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving
more than one heating appliance
Abgasanlagen - Wärme- und strömungstechnische Berechnungsverfahren - Teil 2:
Abgasanlagen mit mehreren Feuerstätten
Conduits de fumée - Méthodes de calcul thermo-aéraulique - Partie 2: Conduits de
fumée desservant plus d'un appareil de chauffage
Ta slovenski standard je istoveten z: EN 13384-2:2015/prA1
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 13384-2:2015
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
October 2018
ICS 91.060.40
English Version
Chimneys - Thermal and fluid dynamic calculation
methods - Part 2: Chimneys serving more than one heating
appliance
Abgasanlagen - Wärme- und strömungstechnische
Berechnungsverfahren - Teil 2: Abgasanlagen mit
mehreren Feuerstätten
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 166.

This draft amendment A1, if approved, will modify the European Standard EN 13384-2:2015. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

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