SIST EN 15287-1:2008
Chimneys - Design, installation and commissioning of chimneys - Part 1: Chimneys for non-roomsealed heating appliances
Chimneys - Design, installation and commissioning of chimneys - Part 1: Chimneys for non-roomsealed heating appliances
This European Standard describes the method of specifying the design, installation criteria for system chimneys, construction of custom built chimneys, and the relining of existing chimneys. It also gives information on commissioning of chimneys.
This European Standard also deals with connecting flue pipes.
This European Standard does not apply to freestanding chimneys covered by EN 13084-1.
This European Standard excludes chimneys designated H (high positive pressure chimneys) and chimneys for room-sealed heating appliances.
For the purpose of this European Standard the term "installation" includes construction.
Abgasanlagen - Planung, Montage und Abnahme von Abgasanlagen - Teil 1: Abgasanlagen für raumluftabhängige Feuerstätten
Diese Europäische Norm trifft Festlegung für die Planung und die Montage von Systemabgasanlagen, Montageabgasanlagen und die Innenrohrerneuerung bestehender Abgasanlagen. Sie enthält auch Angaben über die Abnahme einer eingebauten Abgasanlage.
Diese Norm befasst sich auch mit Verbindungsstücken.
Diese Europäische Norm gilt nicht für freistehende Schornsteine nach EN 13084-1.
Diese Norm gilt nicht für Abgasanlagen mit der Bezeichnung H (Abgasanlagen mit Überdruck) oder Abgasanlagen an die raumluftunabhängige Feuerstätten angeschlossen werden.
Conduits de fumée - Conception, installation et mise en oevre des conduits de fumée - Partie 1: Conduits de fumée pour appareils qui dépendent de l'air dans la piece
La présente Norme décrit la méthode permettant de spécifier les criteres d’installation et de conception relatifs aux conduits de fumée du systeme, aux conduits de fumée construits sur site, et au tubage des conduits de fumée existants. Elle fournit également des informations pour la mise en service d’un conduit de fumée venant d’etre installé.
La présente Norme traite également du raccordement des conduits de raccordement.
La présente Norme européenne ne s’applique pas aux conduits de fumée auto portants couverts par l’ EN 13084-1.
La présente Norme exclut les conduits de fumée de type H (conduits de fumée a pression positive élevée) et les conduits de fumée relatifs aux appareils étanches.
Dimniki - Projektiranje, vgradnja in pregled dimnikov - 1. del: Dimniki za ogrevalne naprave v netesnih prostorih
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Chimneys - Design, installation and commissioning of chimneys - Part 1: Chimneys for non-roomsealed heating appliancesDimniki - Projektiranje, vgradnja in pregled dimnikov - 1. del: Dimniki za ogrevalne naprave v netesnih prostorihConduits de fumée - Conception, installation et mise en oevre des conduits de fumée - Partie 1: Conduits de fumée pour appareils qui dépendent de l'air dans la pieceAbgasanlagen - Planung, Montage und Abnahme von Abgasanlagen - Teil 1: Abgasanlagen für raumluftabhängige FeuerstättenTa slovenski standard je istoveten z:EN 15287-1:2007SIST EN 15287-1:2008en,fr,de91.060.40ICS:SLOVENSKI
STANDARDSIST EN 15287-1:200801-marec-2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15287-1September 2007ICS 91.060.40Supersedes EN 12391-1:2003
English VersionChimneys - Design, installation and commissioning of chimneys- Part 1: Chimneys for non-roomsealed heating appliancesConduits de fumée - Conception et mise en œvre desconduits de fumée - Partie 1: Conduits de fumée pourappareils qui dépendent de l'air dans la pièceAbgasanlagen - Planung, Montage und Abnahme vonAbgasanlagen - Teil 1: Abgasanlagen fürraumluftabhängige FeuerstättenThis European Standard was approved by CEN on 28 July 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15287-1:2007: E
EN 15287-1:2007 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.6 4 Design.11 5 Installation.25 6 Commissioning/handover.26 Annex A (informative)
Determination of the chimney designation for custom-built and relined chimneys.27 Annex B (informative)
List of heating appliance data required for the design of a chimney.39 Annex C (informative)
Example of a chimney designation.40 Annex D (informative)
Correlation between designation parameters for clay/ceramic flue liners and clay/ceramic flue blocks and concrete flue liners and concrete flue blocks.41 Annex E (informative)
Designation of metal system chimneys and correlation between metal liner material specification and corrosion load in Member States (MS).43 Annex F (informative)
Example of typical building structure designed to assist exchange of information.49 Annex G (informative)
Examples of a chimney plate.52 Annex H (normative)
Determination of a chimney designation for an installed metal system chimney.53 Annex I (informative)
Example for the determination of the designation of a relined chimney using a metal flue liner.54 Annex J (informative)
Example for the determination of the designation of a custom-built chimney using a clay/ceramic flue liner.60 Annex K (normative)
Determination of the designation for an installed metal connecting flue pipe.65 Annex L (informative)
Recommendations for inspection, cleaning and maintenance.66 Annex M (informative)
Location of the chimney outlet.67 Annex N (informative)
Calculating the temperature of adjacent material.71 Annex O (informative)
Chimney commissioning.74 Annex P (informative)
Useful hints for checking, handling and site storage of materials and components.77 Bibliography.79
EN 15287-1:2007 (E) 3 Foreword This document (EN 15287-1:2007) has been prepared by Technical Committee CEN/TC 166 “Chimneys”, the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2008, and conflicting national standards shall be withdrawn at the latest by March 2008. This document supersedes EN 12391-1:2003. This document is one of a series of specifications as listed below: Chimneys — Design, installation and commissioning of chimneys — Part 1: Chimneys for non-roomsealed heating appliances. Chimneys — Design, installation and commissioning of chimneys — Part 2: Chimneys for roomsealed heating appliances. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 15287-1:2007 (E) 4 Introduction CEN/TC 166 started with its programme on standardization of chimneys approximately 15 years ago, with standards for interfaces, for products, for test and last but not least for design, installation, construction and commissioning matters. For the work program in the last years first priority had been given to product and test standards. In the meantime most of the product and test standards are published or nearly ready to be published. In order to introduce the products, which are tested and certified in accordance with the relevant European Standards, in an easy way on the markets of the different countries, some common rules for design, installation, and commissioning especially with reference to the designation of a chimney are helpful. Firstly CEN/TC 166/SC 2 started the work on execution standards for metal chimneys. The first standard had been already published as EN 12391-1 in 2003. In order not to repeat this work in all material oriented WGs and SCs, CEN/TC 166 decided in 2002 to give the task to WG 1 to develop a material independent design, installation and commissioning standard. CEN/TC 166/WG 1 started the work in 2003 and decided first to write two documents, one for chimneys connected to non-roomsealed heating appliances and one for chimneys connected to room-sealed heating appliances. Working on the documents there where two strong positions, one for a Technical Specification (TS) and one for a European Standard (EN). Following the proposal of CEN/TC 166/WG 1, CEN/TC 166 decided to launch a vote on the question which of the two positions should apply. The CEN/TC 166 members had been in favour of creating European Standards (EN).
EN 15287-1:2007 (E) 5 1 Scope This European Standard describes the method of specifying the design, installation criteria for system chimneys, construction of custom built chimneys, and the relining of existing chimneys. It also gives information on commissioning of chimneys. This European Standard also deals with connecting flue pipes. This European Standard does not apply to freestanding chimneys covered by EN 13084-1. This European Standard excludes chimneys designated H (high positive pressure chimneys) and chimneys for room-sealed heating appliances. For the purpose of this European Standard the term "installation" includes construction. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1443:2003, Chimneys — General requirements EN 1457, Chimneys — Clay/ceramic flue liners — Requirements and test methods EN 1806, Chimneys — Clay/ceramic flue blocks for single wall chimneys — Requirements and test methods EN 1856-1, Chimneys — Requirements for metal chimneys — Part 1: System chimney products EN 1856-2, Chimneys — Requirements for metal chimneys — Part 2: Metal liners and connecting flue pipes EN 1857, Chimneys — Components — Concrete flue liners EN 1858, Chimneys — Components — Concrete flue blocks EN 12446, Chimneys — Components — Concrete outer wall elements EN 13063-1, Chimneys — System chimneys with clay/ceramic flue liners — Part 1: Requirements and test methods for sootfire resistance EN 13063-2, Chimneys — System chimneys with clay/ceramic flue liners — Part 2: Requirements and test methods under wet conditions EN 13063-3, Chimneys — System chimneys with clay/ceramic flue liners — Part 3: Requirements and test methods for air flue system chimneys EN 13069, Chimneys — Clay/ceramic outer walls for system chimneys — Requirements and test methods EN 13084 (all parts), Free-standing chimneys EN 13384-1:2002, Chimneys — Thermal and fluid dynamic calculation methods — Part 1: Chimneys serving one appliance EN 13384-2, Chimneys — Thermal and fluid dynamic calculation methods — Part 2: Chimneys serving more than one heating appliance
EN 15287-1:2007 (E) 6 EN 13502, Chimneys — Requirements and test methods for clay/ceramic flue terminals EN 14297, Chimneys — Freeze-thaw resistance test method for chimney products EN 14471, Chimneys — System chimneys with plastic flue liners — Requirements and test methods EN 14989-1, Chimneys — Requirements and test methods for metal chimneys and material independent air supply ducts for roomsealed heating applications — Part 1: Vertical air/flue terminals for C6-type appliances 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1443:2003 together with the following apply. NOTE Examples of chimney construction identifying individual component terminology and definitions are given in Figures 1, 2 and 3. 3.1 access component component installed in the chimney or in the connecting flue pipe to provide access to the flue for the purpose of inspection or cleaning 3.2 back ventilation ventilation in the space between flue liner and the outer wall of the chimney or an enclosure to evacuate the products of combustion which can escape from the flue liner in positive pressure multi-wall systems 3.3 centralising spacer component to centralise the liner 3.4 chimney adapter component which connects a chimney to a connecting flue pipe or an heating appliance 3.5 condensate drain component to facilitate the disposal of condensate 3.6 damper device used to close or partially close the flue 3.7 draught regulator balanced hinged flap in a flue opening to allow airflow into the chimney to control draught at the boiler outlet 3.8 elbow chimney fitting which provides a change of direction of the flue 3.9 explosion relief device that protects the chimney against overpressure arising from deflagration or explosion in the flue 3.10 fire compartment part of the building being isolated to provide resistance to fire
EN 15287-1:2007 (E) 7 3.11 fire stop component intended to provide resistance to fire spread between rooms or compartments 3.12 flashing component or site fabricated materials used for weatherproofing the penetration of the roof by the chimney 3.13 flexible liner tube having a single or multi-skin construction that is able to bend in any direction without permanent deformation 3.14 heating appliance adapter component which connects the connecting flue pipe or the chimney to a heating appliance 3.15 rain cap part of the chimney that protects against the entry of rain. This can be a part of a terminal 3.16 rigid liner straight liner that cannot bend without permanent deformation 3.17 rain seal part of the chimney that stops the entry of rain into the insulation space 3.18 seal device that joins two elements in such a way as to prevent leakage 3.19 sealant material which, applied in an unformed state to a joint, seals it by adhering to appropriate surfaces within the joint 3.20 silencer component installed to provide noise attenuation 3.21 sleeve component which provides an aperture through a wall, ceiling or floor through which a chimney or a connecting flue pipe passes 3.22 test point component that provides access for flue gas sampling and measurement 3.23 T-piece chimney fitting which allows a heating appliance, connecting flue pipe or accessory to be connected to the chimney flue at an angle
EN 15287-1:2007 (E) 8
Key 1 chimney 7 chimney section 2 flue 8 adjacent combustible wall or enclosure or cladding 3 flue liner 9 chimney fitting 4 thermal insulation 10 connecting flue pipe 5 outer wall 11 heating appliance 6 non-combustible enclosure or cladding 12 distance to combustible material
13 access component Figure 1 — Chimney components and chimney accessories of a multi-wall chimney
EN 15287-1:2007 (E) 9
Key see Clause 3 a chimney in a solid block shaft b internal or external chimney without enclosure c chimney in a cavity block d chimney in a shaft or an enclosure as a part of the building structure e chimney in a separate enclosure Figure 2 — Terminology for a system chimney NOTE The liner may be of clay, concrete, metal or plastic.
EN 15287-1:2007 (E) 10
Key see Clause 3 Figure 3 — Terminology for a custom-built or a relined chimney NOTE The liner may be of clay, concrete, metal or plastic.
EN 15287-1:2007 (E) 11
4 Design 4.1 General In order to design a chimney installation the following steps should be followed to achieve a safe chimney installation. Chimneys shall comply with national regulations and nationally accepted rules. 4.2 Data requirements 4.2.1 Sources of data and information The data and information specified in 4.2.2 to 4.2.6 shall be obtained and documented as appropriate. NOTE The sources can be: heating appliance manufacturers catalogues and literature; chimney manufacturers literature including installation instructions; architects drawings or plans and/or site surveys; local building rules. A possible source of typical or average data is in Annex A and in EN 13384-1. 4.2.2 Heating appliance information The information for the heating appliance(s) (see Annex B for an example) shall be obtained from the documentation of the heating appliance manufacturer or if not available, default values may be used (see EN 13384-1:2002, Annex B), but the source of the data shall be documented in the design (see 4.2.1). 4.2.3 Chimney product specification The following information about the chimney product specification shall be obtained (see 4.2.1): identification and designation of the system chimney or of the components for custom built chimneys or for relining an existing chimney, see also Annex C, Annex D and Annex E; design load or maximum allowed chimney height to be supported by lengths, fittings and supports; mass of components; manufacturer’s installation instruction; additional information for chimney sizing (see EN 13384-1).
EN 15287-1:2007 (E) 12
4.2.4 Building construction and chimney route information In order to allow the chimney route to be determined the relevant details of the building or support structure shall be obtained (see Figure F.1). If the chimney is to be supported by the building structure, the construction of the building and the materials used shall be capable of supporting the loads imposed upon it by the chimney. The fixings shall be compatible with the materials of construction of the building. This shall be checked before installing the chimney. A check list of information is given in Annex F. 4.2.5 Local conditions Environmental and topographical particulars of the site shall be obtained. 4.2.6 Combustion air supply Information on the size and position of apertures for combustion air supply into the room containing the heating appliance shall be obtained (possible sources of data are given in 4.2.1). 4.3 Design requirements 4.3.1 General The design of the chimney installation shall be detailed and documented. Manufacturers' product information may fulfil this requirement. The design should enable a chimney product manufacturer’s standard components to be used in carrying out the installation. Modification of components, e.g. producing openings or adjustments of length may only be undertaken in accordance with the manufacturer’s instructions. NOTE The finished chimney should have a designation in accordance with EN 1443 (see Annex C). The chimney products should be chosen so that the designation reflects the suitability of the chimney for the intended use. Annex E gives an example for the designation of a metal system chimney and Annex A gives an example of the general designation of a chimney according EN 1443. The finished chimney should have a chimney plate (see Annex G). 4.3.2 Designation The chimney and connecting flue pipe shall have designation classes appropriate to the heating appliance data as required in 4.2.2 and the building structure data as required in 4.2.4. The connecting flue pipe may have a designation different from that of the chimney i.e. where the heating appliance output results in a positive pressure in the connecting flue pipe. Each designation parameter shall be of a class at least equal to that required or shall be of a higher class according to the following sequence: T600 > T450 > T400 > T300 > T250 > T200 > T160 > T140 > T120 > T100 > T080; H > P > N; Wx > Dx; D3 > D2 > D1; W3 > W2 > W1; G > O;
EN 15287-1:2007 (E) 13 where T
is the temperature class; P
is the positive pressure class; N
is the negative pressure class; O
is without soot fire resistance; G
is with soot fire resistance; xx
is the distance to combustibles; and for corrosion class: W
is wet operating conditions; D
is dry operating conditions; 1 is for gas and kerosene with a sulphur content ≤ 50 mg/m3; 2 is for light oil / wood in open fires; 3 is for heavy oil / wood in closed stoves / coal and peat. 4.3.3 Determination of designation of the chimney and connecting flue pipe 4.3.3.1 General The chimney shall be assigned designations according to EN 1443 (see Annex C). 4.3.3.2 System chimney The designation of an installed system chimney shall be according to the product standard EN 13063-1 and EN 13063-2 for clay/ceramic products and EN 1858 for concrete products. The designation of an installed metal system chimney according to EN 1856-1 shall be according to Annex H. The designation of an installed plastic system chimney shall be according to the product standard EN 14471 excluding the location, reaction to fire and enclosure parameters. 4.3.3.3 Custom-built and relined chimney The designation of a custom-built or a relined chimney shall be determined. The methods to determine the designation is according to the calculations of Annex A or according to national regulations or nationally accepted rules. The temperature class, the sootfire class and the distance to combustible material given in the designation of a chimney product may be used for the custom-built chimney designation. NOTE Examples for the determination of the designation of relined and custom built chimneys are given in Annex I and Annex J.
EN 15287-1:2007 (E) 14 4.3.3.4 Connecting flue pipe The designation of metal connecting flue pipes according to EN 1856-2 shall be determined according to Annex K. The designation of connecting flue pipes made of system chimney components, e.g. EN 1856-1,
EN 13063-1 and EN 14471 shall be determined according to 4.3.3.2. The designation of connecting flue pipes constructed in a custom-built manner, e.g. using glass, fibre products, or clay products such as bricks, should be determined according to Annex A. 4.3.4 Materials of construction 4.3.4.1 General Supplementary materials not supplied with the chimney products shall be fit for purpose (e.g. in terms of corrosion, temperature and strength), jointing compounds (e.g. cements, mortars and seals), rendering, waterproofing/sealing materials, fixings, screws or additional supports. 4.3.4.2 System chimneys System chimneys shall be in accordance with EN 1856-1, EN 1858, EN 13063-1, EN 13063-2 and EN 14471. 4.3.4.3 Relined chimneys 4.3.4.3.1 Flue liners Flue liners for relining shall be made from rigid flue liners according to the requirements of EN 1457,
EN 1856-2 and EN 1857, or flexible flue liners according to the requirements of EN 1856-2. Positive pressure and wet designated flue liners and fittings (i.e. access component), including any seals/sealants shall be confirmed as a combination for that pressure class and condensate resistance class. Chimney products according to the requirements of EN 1806, EN 1856-1, EN 1858 and EN 14471 may also be used as liners. 4.3.4.3.2 Insulation Any insulation between the new liner and the outer wall shall be either rigid or be loose material and be approved to be fit for the intended use or be an air gap or according to national regulations or nationally accepted rules. The thermal resistance or the thermal conductivity of the insulation shall be obtained from the product manufacturer, or in the absence of this information, typical values for the thermal conductivity are given in Annex A. NOTE 1
Care should be taken when using loose infill without binders to prevent the risk of flue blockage arising from the escape of the insulation into the flue, e.g. by choosing a material with adequate corrosion resistance and allows free movement of the flue liner. Loose infill with binders shall not prevent free movement of the liner. NOTE 2
To determine the effect of a closed air gap see Table A.3 or the alternative calculation. NOTE 3
To determine the effect of an open air gap an external heat transfer coefficient of 8 W/(m2⋅K) should be used in the calculation for heat transfer (see EN 13384-1). Any additional insulation outside of the air gap is excluded in the calculation.
EN 15287-1:2007 (E) 15 4.3.4.3.3 Outer wall The existing chimney will become the outer wall of the relined chimney. The existing chimney shall be checked that it is fit for relining purposes. Any repair of the existing chimney or its outer wall (e.g. for resistance to fire, gas tightness purposes) shall be in accordance with the national regulations or nationally accepted rules. Typical values for the thermal conductivity are given in Annex A. 4.3.4.4 Custom-built-chimneys 4.3.4.4.1 Flue liners Flue liners for custom-built chimneys shall be made from rigid flue liners in accordance with the requirements of EN 1457, EN 1856-2 and EN 1857. For positive pressure and wet applications flue liners and fittings (i.e. access component), including any seals/sealants shall be confirmed as a combination for that pressure class and condensate resistance class. Chimney products in accordance with the requirements of EN 1806, EN 1856-1, EN 1858 and EN 14471 may also be used as liners. 4.3.4.4.2 Insulation Any insulation between the liner and the outer wall shall be either rigid or be loose material and be approved to be fit for the intended use or be an air gap or according to national regulations and nationally accepted rules. The thermal resistance or the thermal conductivity of the insulation shall be obtained from the product manufacturer, or in the absence of this information. Typical values for the thermal conductivity are given in
Annex A. NOTE 1 Care should be taken when using loose infill without binders to prevent the risk of flue blockage arising from the escape of the insulation into the flue, e.g. by choosing a material with adequate corrosion resistance and allows free movement of the flue liner. Loose infill with binders shall not prevent free movement of the liner. NOTE 2 To determine the effect of a closed air gap see Table A.3 or the alternative calculation. NOTE 3 To determine the effect of an open air gap an external heat transfer coefficient of 8 W/(m2⋅K) should be used in the calculation for heat transfer (see EN 13384-1). Any additional insulation outside of the air gap is excluded in the calculation. 4.3.4.4.3 Outer wall Chimney products in accordance with EN 12446, EN 1806, EN 1858 and EN 13069 may be used as outer wall components. Other products may be used, e.g. brick, steel, concrete according to national regulations or nationally accepted rules. Performance characteristics for some products are given in Annex A. 4.3.4.5 Connecting flue pipe and adapters The material of the metal connecting flue pipe shall comply with EN 1856-2. System chimney components including adapters complying with EN 1856-1, or EN 14471 can also be used. Flexible flue liners complying with EN 1856-2 can also be used as connecting flue pipes where permitted in accordance with national regulations. Connecting flue pipes and adapters may also be constructed in a custom-built manner, e.g. using glass, fibre products, or even clay products such as bricks, according to national rules.
EN 15287-1:2007 (E) 16 4.3.4.6 Supplementary components or additional materials Supplementary components or additional materials shall have performance characteristics appropriate to the designation of the chimney components, which affect them e.g. insulation operating temperatures. 4.3.5 Flue size The flue for the chimney and the connecting flue pipe shall be sized to suit the heating appliance which it serves. The method for sizing the flue should be based on the thermal and fluid dynamic calculation methods of EN 13384-1 and EN 13384-2. NOTE 1 EN 13384-1 describes a calculation method for chimneys serving one appliance. NOTE 2 EN 13384-2 describes a calculation method for chimneys serving more than one appliances. NOTE 3 The chimney manufacturer or the heating appliance manufacturer may specify a flue size, but this should not conflict with the size range calculated according to either EN 13384-1 or EN 13384-2 as appropriate. 4.3.6 Chimney route The chimney route should be determined by the positions of the heating appliances the flue outlet position, air supply intake and the point of chimney termination. The chimney route should be the shortest, most direct route between the heating appliance outlet and the chimney termination and should be straight and vertical wherever possible, with the termination being as near to the highest part of the building (e.g. ridge) as practicable to ensure adequate draught and dispersion of flue gas. The chimney route selected should enable the chimney manufacturer standard components to be used in carrying out the installation, including offsets to be supported in compliance with the manufacturer’s installation instructions. Attention should be given to heat emitted from the chimney in applications where whole year operation is likely to affect comfort. NOTE A thermal resistance of at least 0,22 m2⋅K/W is recommended for temperature class T300 and above. 4.3.7 Connecting flue pipe route The connecting flue pipe shall not pass through a ceiling or into another fire compartment or spaces which cannot be inspected. A connecting flue pipe designated suitable for we
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