Slow heat release appliances fired by solid fuel - Requirements and test methods

This European Standard specifies requirements relating to the design, manufacture, construction, safety and performance (efficiency and emission) instructions and marking together with associated test methods and test fuels for type testing residential slow heat release appliances fired by solid fuel.
This European Standard is applicable to hand fuelled intermittent burning slow heat release appliances having thermal storage capacity such that they can provide heat for a declared period of time after the fire has gone out. This European Standard also specifies a minimum time period from the appliance achieving the maximum differential surface temperature and falling to 50 % of that maximum value. These appliances provide heat into the space where they are installed.
These slow heat release appliances may be supplied either as an assembled appliance or as a manufacturer’s pre-designed unit consisting of pre-fabricated components designed to be built on site in accordance with the manufacturer’s specified assembly instructions. One off installations are not included.
These appliances may burn either solid mineral fuels, peat briquettes, natural or manufactured wood logs or be multi-fuel in accordance with the appliance manufacturer’s instructions. Wood pellets which are hand fuelled may also be burned either on the existing appliance bottomgrate or in a special basket arrangement which is placed by the user into the existing firebox.
This European Standard is not applicable to mechanically fed appliances, appliances having fan assisted combustion air or appliances with boiler.

Speicherfeuerstätten für feste Brennstoffe - Anforderungen und Prüfverfahren

Diese Europäische Norm legt Anforderungen an Auslegung, Herstellung, Ausführung, Sicherheit und Leistungsvermögen (Wirkungsgrad und Emission), Anleitung und Kennzeichnung zusammen mit zugehörigen Prüfverfahren und Prüfbrennstoffen für die Typprüfung von Raumheizern für feste Brennstoffe fest.
Diese Europäische Norm gilt für handbeschickte Feuerstätten mit Wärmespeicherung, die Wärme für eine angegebene Zeit abgeben können, nachdem das Feuer erloschen ist. Diese Europäische Norm legt auch die Mindestdauer fest, in der die Feuerstätte die maximale Oberflächentemperatur erreicht und in der die Oberflächentemperatur auf 50 % dieses Maximalwertes abfällt. Diese Feuerstätten beheizen den Aufstellungsraum.
Diese Norm ist nur für solche Speicherfeuerstätten anzuwenden, die entweder als fertig montierte Feuerstätte oder als vom Hersteller bestimmte Einheit, die aus vorgefertigten Komponenten besteht, vor Ort nach den Herstellerangaben aufgestellt wird. Vom Handwerk gefertigte Installationen sind nicht enthalten.
Die Feuerstätten können entsprechend der Bedienungsanleitung des Herstellers entweder feste mineralische Brennstoffe, Torfbriketts, Holzscheite, Holzbriketts oder mehrere dieser Brennstoffe verfeuern. Von Hand zu befüllende Holzpellets können entweder auf den vorhandenen Feuerraumbodenrost der Feuerstätte oder in einer speziellen Vorrichtung, die der Betreiber in den vorhandenen Feuerraum hineinstellt, platziert werden.
Diese Europäische Norm gilt nicht für mechanisch beschickte Feuerstätten, Feuerstätten mit Verbrennungs-luftgebläse oder Feuerstätten mit wasserführenden Bauteilen.

Appareils de chauffage domestique à combustible solide à libération lente de chaleur - Exigences et méthodes d'essai

La présente Norme européenne spécifie les exigences relatives aux instructions de conception, fabrication, construction, sécurité et performance (rendement et émission) et au marquage, ainsi que les méthodes et combustibles d'essai correspondants pour les essais de type des appareils de chauffage domestique à combustible solide à libération lente de chaleur.
La présente Norme européenne s'applique aux appareils de chauffage à libération lente de chaleur à combustion intermittente alimentés manuellement, dont la capacité de stockage thermique leur permet de fournir de la chaleur pendant une durée déclarée après la fin de la combustion. La présente Norme européenne spécifie également une période minimale comprise entre le moment où l'appareil atteint la température de surface différentielle maximale et où la température chute à 50 % de cette valeur maximale. Ces appareils fournissent de la chaleur dans l'espace où ils sont installés.
Ces appareils de chauffage à libération lente de chaleur peuvent être fournis sous la forme d'appareil assemblé ou d'une unité conçue au préalable par le fabricant, constituée d'éléments préfabriqués, destinés à être montés sur le site conformément aux instructions d'assemblage spécifiées par le fabricant. Les installations uniques ne sont pas incluses.
Ces appareils peuvent fonctionner avec des combustibles minéraux solides, des briquettes de tourbe, des bûches de bois naturelles ou manufacturées ; ils peuvent également fonctionner avec plusieurs combustibles conformément aux instructions du fabricant de l'appareil. Des granules de bois, alimentés manuellement, peuvent également être brûlés sur la grille de l'appareil ou sur un dispositif spécial en forme de panier, placé dans le foyer existant par l'utilisateur.
La présente Norme européenne ne s'applique pas aux appareils à alimentation mécanique, aux appareils dont l'air de combustion est assisté par un ventilateur et aux appareils avec bouilleur.

Naprave na trdna goriva, ki počasi oddajajo toploto - Zahteve in preskusne metode

General Information

Status
Published
Publication Date
13-Mar-2007
Current Stage
9093 - Decision to confirm - Review Enquiry
Completion Date
09-Nov-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Slow heat release appliances fired by solid fuel - Requirements and test methodsAppareils de chauffage domestique a combustible solide a libération lente de chaleur - Exigences et méthodes d'essaiSpeicherfeuerstätten für feste Brennstoffe - Anforderungen und PrüfverfahrenTa slovenski standard je istoveten z:EN 15250:2007SIST EN 15250:2007en,fr,de97.100.30Grelniki na trdo gorivoSolid fuel heatersICS:SLOVENSKI
STANDARDSIST EN 15250:200701-september-2007







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15250March 2007ICS 97.100.30 English VersionSlow heat release appliances fired by solid fuel - Requirementsand test methodsAppareils de chauffage domestique à combustible solide àlibération lente de chaleur - Exigences et méthodes d'essaiSpeicherfeuerstätten für feste Brennstoffe - Anforderungenund PrüfverfahrenThis European Standard was approved by CEN on 13 January 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 15250:2007: E



EN 15250:2007 (E) 2 Contents Page Foreword.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.6 4 Materials, design and construction.9 4.1 Production documentation.9 4.2 Construction.10 4.2.1 General construction.10 4.2.2 Cleaning of heating surfaces.10 4.2.3 Flue spigot or socket.10 4.2.4 Flueways.10 4.2.5 Ashpan and ash removal.11 4.2.6 Bottomgrate.11 4.2.7 Combustion air supply.11 4.2.8 Control of flue gas.11 4.2.9 Firedoors and charging doors.12 4.2.10 Flue bypass device.12 4.2.11 Front firebars and/or deepening plate.12 5 Safety.12 5.1 Temperature rise in the fuel storage container.12 5.2 Temperature rise of the operating components.12 5.3 Temperature of adjacent combustible materials.12 5.4 Electrical safety.13 6 Performance.13 6.1 Flue gas temperature.13 6.2 Carbon monoxide emission.13 6.3 Efficiency.13 6.4 Flue draught.13 6.5 Refuelling intervals.13 6.6 Thermal storage capacity.13 7 Appliance instructions.14 7.1 General.14 7.2 Installation instructions.14 7.3 User operating instructions.15 8 Marking.16 9 Evaluation of conformity.16 9.1 General.16 9.2 Type testing.17 9.2.1 Initial type testing.17 9.2.2 Further type testing.18 9.3 Factory production control (FPC).20 9.3.1 General.20 9.3.2 Raw materials and components.20 9.3.3 Control of inspection, measuring and test equipment.20 9.3.4 Process control.20 9.3.5 Product inspection, testing and evaluation.21 9.3.6 Non conforming products.22 9.3.7 Corrective and preventive action.22 9.3.8 Handling, storage, packaging, preservation and delivery.22



EN 15250:2007 (E) 3 Annex A (normative)
Test methods.23 A.1 Test environment.23 A.1.1 Ambient room temperature.23 A.1.2 Cross-draught.23 A.1.3 External sources.23 A.2 Test assembly.23 A.2.1 General.23 A.2.2 Trihedron.24 A.2.3 Measurement section.24 A.2.4 Connection of appliance to measurement section.25 A.2.5 Measurement of appliance surface temperature for slow heat release appliances.25 A.3 Measurement equipment.26 A.4 Test procedures.27 A.4.1 Appliance installation.27 A.4.2 Fuel load.27 A.4.3 Fuelling and de-ashing the fire.28 A.4.4 Flue gas losses.28 A.4.5 Combustible heat losses in the residue.28 A.4.6 Burning rate performance test.28 A.4.7 Temperature safety test for woodburning and multifuel appliances.29 A.5 Test results.30 A.6 Calculation methods.31 A.6.1 Notations and units used.31 A.6.2 Equations.32 A.7 Test report.36 Annex B (normative)
Test fuels and recommended fuels.47 B.1 General.47 B.2 Test fuel.47 B.2.1 Selection of test fuel.47 B.2.2 Storage, preparation and analysis.47 B.3 Tests for recommended fuels.48 B.3.1 Basis of testing.48 B.3.2 Test methods and criteria.48 Annex C (informative)
Calculation of an approximate heat release curve against time.54 Annex ZA (informative)
Clauses of this European standard addressing the provisions of the EU Construction Products Directive.57 ZA.1 Scope and relevant characteristics.57 ZA.2 Procedure for the attestation of conformity of slow heat release appliances fired by solid fuels.59 ZA.2.1 System of attestation of conformity.59 ZA.2.2 EC Declaration of conformity.60 ZA.3 CE Marking and labelling.60 Bibliography.63



EN 15250:2007 (E) 4 Foreword This document (EN 15250:2007) has been prepared by Technical Committee CEN/TC 295 “Residential solid fuel burning appliances”, the secretariat of which is held by BSI. 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 September 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. 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 15250:2007 (E) 5 1 Scope This European Standard specifies requirements relating to the design, manufacture, construction, safety and performance (efficiency and emission) instructions and marking together with associated test methods and test fuels for type testing residential slow heat release appliances fired by solid fuel. This European Standard is applicable to hand fuelled intermittent burning slow heat release appliances having thermal storage capacity such that they can provide heat for a declared period of time after the fire has gone out. This European Standard also specifies a minimum time period from the appliance achieving the maximum differential surface temperature and falling to 50 % of that maximum value. These appliances provide heat into the space where they are installed. These slow heat release appliances may be supplied either as an assembled appliance or as a manufacturer’s pre-designed unit consisting of pre-fabricated components designed to be built on site in accordance with the manufacturer’s specified assembly instructions. One off installations are not included. These appliances may burn either solid mineral fuels, peat briquettes, natural or manufactured wood logs or be multi-fuel in accordance with the appliance manufacturer’s instructions. Wood pellets which are hand fuelled may also be burned either on the existing appliance bottomgrate or in a special basket arrangement which is placed by the user into the existing firebox. This European Standard is not applicable to mechanically fed appliances, appliances having fan assisted combustion air or appliances with boiler. 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 50165:1997, Electrical equipment for non-electric appliances for household and similar purposes — Safety requirements ISO 334:1992, Solid mineral fuels — Determination of total sulfur — Eschka method ISO 351:1996, Solid mineral fuels — Determination of total sulfur — High temperature combustion method ISO 501:2003, Hard coal — Determination of the crucible swelling number ISO 562:1998, Hard coal and coke — Determination of volatile matter ISO 609:1996, Solid mineral fuels — Determination of carbon and hydrogen — High temperature combustion method ISO 687:2004, Solid mineral fuels — Coke — Determination of moisture in the general analysis test sample ISO 1171:1997, Solid mineral fuels — Determination of ash ISO 1928:1995, Solid mineral fuels — Determination of gross calorific value by the bomb calorimetric method, and calculation of net calorific value ISO 2859 (all parts), Sampling procedures for inspection by attributes ISO 11722:1999, Hard coal — Determination of moisture in the general analysis test sample by drying in nitrogen



EN 15250:2007 (E) 6 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 air grilles components in the inlet and outlet openings to distribute and direct convection air flow 3.2 air inlet control manual or automatic device which controls the quantity of air supplied for combustion 3.3 appliance family group of appliances of similar construction and/or performance characteristics where it is permissible to test only selected appliances in accordance with the requirements of this standard 3.4 ash content of the fuel solid matter remaining after the complete combustion of solid fuel 3.5 ashpan removable receptacle shaped to receive the residue falling from the firebed 3.6 ashpit enclosed chamber designed to receive the residue or the ashpan 3.7 ashpit loss part of the residue which is combustible 3.8 basic firebed quantity of glowing embers which ensures ignition of the test fuel to be charged NOTE The basic firebed may be specified by the manufacturer. 3.9 batch charge proportion of the test load as declared by the manufacturer that can be added at specified intervals during the test period of the burning rate performance test 3.10 bottomgrate part of the appliance at the base of the firebox which supports the firebed through which the residue falls into the ashpan or ashpit and through which combustion air and/or combustion gases may be drawn 3.11 bottomgrate bars; firebars bars supporting the fuelbed, separate or integral with a surrounding frame 3.12 charging door door which covers the refuelling opening 3.13 combustion air air supplied to the firebox which is entirely or partially used to burn the fuel



EN 15250:2007 (E) 7 3.14 combustion gases compounds in gaseous form produced inside an appliance when fuel is burned 3.15 de-ashing process of clearing a fuelbed and discharging the residue into the collecting receptacle 3.16 de-ashing mechanism device to agitate or disturb the ash to facilitate its removal from the firebed NOTE It may also be used to change the bottomgrate operating position on some appliances. 3.17 draught regulator inlet device for admission of air downstream of the firebed, enabling the flue draught to be controlled 3.18 efficiency ratio of total heat output to the total heat input during the burning period expressed as a percentage 3.19 firebox; combustion chamber part of the appliance in which the fuel is burned 3.20 firebox opening aperture in the firebox through which an appliance may be fuelled 3.21 firedoor door through which the fire may be viewed and which may be opened to allow refuelling of the firebed 3.22 flue by-pass device device which in the open position allows flue gases to pass directly to the flue spigot/socket NOTE This can be used as a preheating aid to overcome chimney condensation. 3.23 flue damper mechanism to change the flow of the combustion gases 3.24 flue draught differential between the static pressure in the place of installation and the static pressure at the flue gas measurement point 3.25 flue gases gaseous compounds leaving the appliance flue spigot or socket and entering the flue gas connector 3.26 flue gas connector duct through which flue gases are conveyed from the flue spigot of the appliance into the chimney flue 3.27 flue gas mass flow mass of flue gas drawn off from the appliance per unit of time



EN 15250:2007 (E) 8 3.28 flue gas temperature temperature of the flue gas at the specified point in the measurement section 3.29 flue spigot; flue socket integral part of the appliance for connecting the flue gas connector thus permitting the deliberate escape of products of combustion into the chimney flue 3.30 flueway part of an appliance designed to convey combustion gases from the firebox to the flue spigot/socket 3.31 front firebars grating or plate fitted at the front of the firebox opening to prevent spillage of fuel and ash or to change the firebox capacity, or both 3.32 integral fuel storage container
enclosed area forming part of the appliance, but not connected directly to the fuel charging area, in which fuel is stored prior to it being physically transferred by the user to the fuel charging
3.33 total heat input
positionquantity of energy which the fuel provides to the appliance during
3.34 operating tool device supplied with the appliance for handling movable and/or hot components 3.35 primary air combustion air which passes through the fuel bed 3.36 recommended fuel fuel of commercial quality, listed in the appliance manufacturer’s instructions, and shown to achieve the claimed performance when tested in accordance with this European Standard 3.37 residue ashes, including combustibles, which collect in the ashpit 3.38 slow heat release appliance intermittent burning appliance having thermal storage capacity to accumulate heat into its mass such that it provides heat for a period of hours, specified by the manufacturer, after the fire has gone out 3.39 solid fuel naturally occurring or manufactured solid mineral fuels, natural or manufactured wood logs and peat briquettes 3.40 solid mineral fuel coal, lignite, coke and fuels derived from these 3.41 space heating output heat output provided as convection and radiation to the room



EN 15250:2007 (E) 9 3.42 test fuel fuel of commercial quality being characteristic of its type to be used for testing appliances 3.43 test load mass of test fuel declared by the manufacturer for the burning rate performance test NOTE The test load can be added as batch charges if the manufacturer indicates this in the appliance instructions. 3.44 total heat output total heat output of the appliance quoted by the manufacturer and achieved under defined test conditions when burning the specified test fuel and is calculated as the total heat input less the flue and unburned carbon losses 3.45 working surfaces all surfaces of an appliance designed to transmit heat to the surrounding atmosphere NOTE All external surfaces of a slow heat release appliance including the flue gas connector in accordance with this European Standard are classified as working surfaces because they are designed to transmit heat into the room in which they are installed. 4 Materials, design and construction 4.1 Production documentation The manufacturer shall state the type of appliance, which he is submitting for test and the appliance shall be tested in accordance with the provisions of this European Standard and with the test methods as defined in Annex A. The parameters and characteristics considered in making the decisions in relation to either the family or range of appliances to be submitted for initial type testing (see 9.2.1) or further type testing where changes are made to an appliance (see 9.2.2) shall be recorded. A copy of the parameters and characteristics considered in making the decisions shall be included in the production documentation for each appliance. To identify the appliance, the manufacturer shall have available documents and/or scaled assembly drawings showing the basic design and construction of the appliance. The documentation and/or the drawings shall include at least the following information:  the specification of the materials used in the construction of the appliance;  the fuel loading mass and if applicable the number and mass of any batch charges;  the time duration to firstly reach maximum mean surface temperature value, to secondly reach 50 % of that maximum value and finally to reach 25 % of that maximum value based upon differential surface temperatures against ambient temperatures;  the total amount of heat energy stored in the appliance during the fuel burning period. For appliances which are supplied as pre-designed units consisting of pre-fabricated components designed to be assembled on site then the manufacturer shall provide detailed assembly instructions for the construction of the appliance together with details of making a gas tight connection between the chimney, the appliance and the flue gas connector and for type testing the appliance shall be constructed and tested in accordance with these instructions.



EN 15250:2007 (E) 10 4.2 Construction 4.2.1 General construction The shape and dimensions of the components and equipment and the method of design and manufacture and if assembled on site the method of assembly and installation, shall ensure that when operated as specified in accordance with the test procedures of this European Standard and exposed to the associated mechanical, chemical and thermal stresses, the appliance shall operate reliably and safely such that during normal operation no combustion gas posing a hazard can escape into the room in which the appliance is installed nor can embers fall out. Non-combustible materials shall be used, except that it shall be permissible to use combustible materials for the following applications:  components or accessories fitted outside the appliance;  internal components of controls and safety equipment;  operating handles;  critical equipment. No part of the appliance shall comprise any material known to be harmful. When fired with solid mineral fuels, the appliance shall have a bottomgrate and an ashpan. Component parts, which require periodic replacement and/or removal shall be either so designed or marked for identification to ensure correct fitting. NOTE 1 Because the entire heat dissipating surfaces of the appliance including the flue spigot/socket and the flue gas connector are working surfaces, there is no requirement for limiting the surface temperature of the appliance. NOTE 2 All operations which the user carries out, including loading and emptying of the appliance, adjusting controls and de-ashing should be easy, safe and effective. 4.2.2 Cleaning of heating surfaces All heating surfaces shall be accessible from the flue gas side for inspection and cleaning with brushes, scrapers or chemical agents by means of sufficient cleani
...

SLOVENSKI oSIST prEN 15250:2005

PREDSTANDARD
julij 2005
Naprave na trdna goriva, ki počasi oddajajo toploto – Zahteve in preskusne
metode
Slow heat release appliances fired by solid fuel - Requirements and test methods
ICS 97.100.30 Referenčna številka
oSIST prEN 15250:2005(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
DRAFT
prEN 15250
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2005
ICS
English version
Slow heat release appliances fired by solid fuel - Requirements
and test methods
Appareils de chauffage domestique à combustible solide à
libération lente de chaleur - Exigences et méthodes d'essai
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 295.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard 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 Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15250:2005: E
worldwide for CEN national Members.

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prEN 15250:2005 (E)
Contents Page
Foreword .4
1 Scope.4
2 Normative references.4
3 Terms and definitions.5
4 Materials, design and construction .9
4.1 Production documentation.9
4.2 Construction.10
4.2.1 General construction.10
4.2.2 Cleaning of heating surfaces .10
4.2.3 Flue spigot or socket.10
4.2.4 Flueways.10
4.2.5 Ashpan and ash removal.10
4.2.6 Bottomgrate.11
4.2.7 Combustion air supply.11
4.2.8 Control of flue gas .11
4.2.9 Firedoors and charging doors .11
4.2.10 Flue bypass device .11
4.2.11 Front firebars and/or deepening plate.11
4.2.12 Solid mineral fuel and peat briquettes burning appliances.11
5 Safety.12
5.1 Temperature rise in the fuel storage container (other than the fuel hopper) .12
5.2 Temperature rise of the operating components .12
5.3 Temperature of adjacent combustible materials .12
5.4 Electrical safety.12
6 Performance.12
6.1 Flue gas temperature.12
6.2 Carbon monoxide emission .12
6.3 Efficiency.12
6.4 Flue draught.13
6.5 Refuelling intervals.13
6.6 Thermal storage capacity.13
7 Appliance instructions.13
7.1 General.13
7.2 Installation instructions.13
7.3 User operating instructions.14
8 Marking.14
9 Evaluation of conformity .15
9.1 General.15
9.2 Type testing.15
9.2.1 Initial type testing .15
9.2.2 Further type testing.16
9.3 Factory production control (FPC).18
9.3.1 General.18
9.3.2 Raw materials and components .18
9.3.3 Control of inspection, measuring and test equipment.18
9.3.4 Process control.18

9.3.5 Product inspection, testing and evaluation .18
9.3.6 Non conforming products .19
9.3.7 Corrective and preventive action.19
9.3.8 Handling, storage, packaging, preservation and delivery .20
2

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prEN 15250:2005 (E)
Annex A (normative) Test methods .21
A.1 Test environment.21
A.1.1 Ambient room temperature .21

A.1.2 Cross-draught.21
A.1.3 External sources.21
A.2 Test assembly.21
A.2.1 General.21
A.2.2 Trihedron.21
A.2.3 Measurement section.22
A.2.4 Connection of appliance to measurement section.23
A.2.5 Measurement of appliance surface temperature for slow heat release appliances.23
A.3 Measurement equipment.24
A.4 Test procedures.24
A.4.1 Appliance installation.24

A.4.2 Fuel load.25
A.4.3 Fuelling and de-ashing the fire .25
A.4.4 Flue gas losses.25
A.4.5 Combustible heat losses in the residue.25
A.4.6 Burning rate performance test.25
A.4.7 Temperature safety test for woodburning and multifuel appliances .26
A.5 Test results.27
A.6 Calculation methods.27
A.6.1 Notations and units used .27
A.6.2 Formulae.29
A.7 Test report.31
Annex B (normative) Test fuels and recommended fuels.42
B.1 General.42
B.2 Test fuel.42
B.2.1 Selection of test fuel.42
B.2.2 Storage, preparation and analysis.42
B.3 Tests for recommended fuels .42
B.3.1 Basis of testing.42
B.3.2 Test methods and criteria .43
Annex C (informative) Calculation of an approximate heat release curve against time .48
Annex ZA (informative) Relationship between this European Standard and the
Essential Requirements of EU Directive 89/106/EEC Construction Products .51
C.1 ZA.1.Scope and relevant characteristics 51

3

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prEN 15250:2005 (E)
Foreword
This document (prEN 15250:2005) has been prepared by Technical Committee CEN/TC 295 “Residential solid
fuel burning appliances”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.

1 Scope
This European Standard specifies requirements relating to the design, manufacture, construction, safety and performance
(efficiency and emission) instructions and marking together with associated test methods and test fuels for type testing
residential slow heat release appliances fired by solid fuel.
This standard is applicable to hand fuelled intermittent burning slow heat release appliances having thermal storage capacity
such that they can provide heat for a period of time after the fire has gone out. These appliances provide heat into the space
where they are installed.
These slow heat release appliances may be supplied either as assembled appliance or as pre-fabricated sections designed
to be built on site in accordance with the manufacturer’s specified construction design. One off installations are not included.
These appliances may burn either solid mineral fuels, peat briquettes, natural or manufactured wood logs or be multi-fuel in
accordance with the appliance manufacturer’s instructions.
This standard is not applicable to appliances with fan assisted combustion air
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN xyz:199x, Title of the european standard.
EN ab-c:199x, General title of series of parts — Part c: Title of part.
EN ISO 9001 Quality systems - Model for quality assurance in design/development, production, installation and
servicing
EN 50165 Electrical equipment for non-electric appliances for household and similar purposes. Safety
requirements
ISO 331:1983 Coal; determination of moisture in the analysis sample; direct gravimetric method.
ISO 334:1992 Solid mineral fuels; determination of total sulfur; Eschka method.
ISO 351:1996 Solid mineral fuels; Determination of total sulfur; High temperature combustion method.
ISO 501:1981 Coal; Determination of the crucible swelling number.
ISO 562:1998 Hard coal and coke; Determination of volatile matter.
ISO 609:1996 Solid mineral fuels; Determination of carbon and hydrogen; High temperature combustion
method.
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prEN 15250:2005 (E)
ISO 687:1974 Coke; Determination of moisture in the analysis sample.
ISO 1171:1997 Solid mineral fuels; Determination of ash content.
ISO 1928:1995 Solid mineral fuels; Determination of gross calorific value by the bomb calorimetric method,
and calculation of net calorific value.
ISO 2859 Sampling procedures for inspection by attributes
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
term
text of the definition
3.2
term
text of the definition
3.1
air grilles
components in the inlet and outlet openings to distribute and direct convection air flow
3.2
air inlet control
manual or automatic device which controls the quantity of air supplied for combustion
3.3
ash content of the fuel
solid matter remaining after the complete combustion of solid fuel
3.4
ashpan
removable receptacle shaped to receive the residue falling from the firebed.
3.5
ashpit
enclosed chamber designed to receive the residue or the ashpan
3.6
ashpit loss
part of the residue which is combustible
3.7
basic firebed
quantity of glowing embers which ensures ignition of the test fuel to be charged
NOTE The basic firebed may be specified by the manufacturer.
3.8
batch charge
that proportion of the test load as declared by the manufacturer that can be added at specified intervals during the burning
rate test period
3.9
bottomgrate
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prEN 15250:2005 (E)
part of the appliance at the base of the firebox which supports the firebed through which the residue falls into the ashpan or
ashpit and through which combustion air and/or combustion gases may be drawn
3.10
bottomgrate bars; firebars
bars supporting the fuelbed, separate or integral with a surrounding frame
3.11
charging door
door which covers the refuelling opening
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3.12
combustion air
air supplied to the firebox which is entirely or partially used to burn the fuel
3.13
combustion gases
compounds in gaseous form produced inside an appliance when fuel is burned
3.14
de-ashing
process of clearing a fuelbed and discharging the residue into the collecting receptacle
3.15
de-ashing mechanism
device to agitate or disturb the ash to facilitate its removal from the firebed
NOTE It may also be used to change the bottomgrate operating position on some appliances.
3.16
draught regulator
inlet device for admission of air downstream of the firebed, enabling the flue draught to be controlled
3.17
efficiency
ratio of total heat output to the total heat input during the burning period expressed as a percentage.
3.18
firebox; combustion chamber
that part of the appliance in which the fuel is burned
3.19
firebox opening
aperture in the firebox through which an appliance may be fuelled
3.20
firedoor
door through which the fire may be viewed and which may be opened to allow refuelling of the firebed
3.21
flue by-pass device
device which in the open position allows flue gases to pass directly to the flue spigot/socket
   NOTE This can be used as a preheating aid to overcome chimney condensation.
3.22
flue damper
mechanism to change the flow of the combustion gases
3.23
flue draught
differential between the static pressure in the place of installation and the static pressure at the flue gas measurement point
3.24
flue gases
gaseous compounds leaving the appliance flue spigot or socket and entering the flue gas connector
3.25
flue gas connector
duct through which flue gases are conveyed from the flue spigot of the appliance into the chimney flue
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prEN 15250:2005 (E)
3.26
flue gas mass flow
mass of flue gas drawn off from the appliance per unit of time
3.27
flue gas temperature
temperature of the flue gas at the specified point in the measurement section
3.28
flue spigot; flue socket
integral part of the appliance for connecting the flue gas connector thus permitting the deliberate escape of products of
combustion into the chimney flue
3.29
flueway
that part of an appliance designed to convey combustion gases from the firebox to the flue spigot/socket
3.30
freestanding appliance
appliance designed to operate without needing to be built into a fireplace recess or fireplace enclosure and which is not
connected to the building except by the flue gas connector
3.31
front firebars
grating or plate fitted at the front of the firebox opening to prevent spillage of fuel and ash or to change the firebox capacity,
or both
3.32
heat input
quantity of energy which the fuel provides to the appliance during burning
3.33
heat output
quantity of useful heat released by the appliance.
3.34
integral fuel storage container
enclosed area forming part of the appliance, but not connected directly to the fuel charging area, in which fuel is stored prior
to it being physically transferred by the user to the fuel charging position
3.35
operating tool
device supplied with the appliance for handling movable and/or hot components
3.36
primary air
combustion air which passes through the fuel bed
3.37
recommended fuel
fuel of commercial quality, listed in the appliance manufacturer’s instructions, and shown to achieve the claimed
performance when tested in accordance with this European Standard
3.38
residue
ashes, including combustibles, which collect in the ashpit
3.39
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prEN 15250:2005 (E)
slow heat release appliance
intermittent burning appliance having thermal storage capacity to accumulate heat into its mass such that it
provides heat for a period of hours, specified by the manufacturer, after the fire has gone out.
3.40
solid fuel
naturally occurring or manufactured solid mineral fuels, natural or manufactured wood logs and peat briquettes
3.41
solid mineral fuel
coal, lignite, coke and fuels derived from these
3.42
space heating output
heat output provided as convection and radiation to the room
3.43
test fuel
fuel of commercial quality being characteristic of its type to be used for testing appliances
3.44
test load
the mass of test fuel declared by the manufacturer for the burning rate test.
NOTE The test load can be added as batch charges if the manufacturer indicates this in the appliance instructions
3.45
total heat output
total heat output of the appliance quoted by the manufacturer and achieved under defined test conditions when burning the
specified test fuel
3.46
working surfaces
all surfaces of an appliance designed to transmit heat to the surrounding atmosphere
NOTE All external surfaces of a slow heat release appliance including the flue gas connector in accordance with this
standard are classified as working surfaces because they are designed to transmit heat into the room in which they are
installed.
4 Materials, design and construction
4.1 Production documentation
The manufacturer shall state the type of appliance, which he is submitting for test and the laboratory shall test the appliance
using the standard appropriate to that claim.
The parameters and characteristics considered in making the decisions in relation to either the family or range of appliances
to be submitted for initial type testing (see 9.2.1) or further type testing where changes are made to an appliance (see 9.2.2)
shall be recorded. A copy of the parameters and characteristics considered in making the decisions shall be included in the
production documentation for each appliance.
To identify the appliance, the manufacturer shall have available documents and/or scaled assembly drawings showing the
basic design and construction of the appliance. The documentation and/or the drawings shall include at least the following
information:
- the specification of the materials used in the construction of the appliance;
the fuel loading mass and if applicable the number and mass of any batch charges;
the time duration to firstly reach maximum mean surface temperature value, to secondly reach 50 % of that maximum value
and finally to reach 25 % of that maximum value based upon differential surface temperatures against ambient
temperatures;
the total amount of heat energy stored in the appliance during the fuel burning period
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prEN 15250:2005 (E)
For appliances which are supplied as pre-fabricated sections designed to be built on site then the manufacturer shall provide
detailed instructions for the construction of the appliance together with details of making a gas tight connection between the
chimney, the flue gas connector and the appliance.
4.2 Construction
4.2.1 General construction
The shape and dimensions of the components and equipment and the method of design and manufacture and if assembled
on site the method of assembly and installation, shall ensure that when operated as specified in accordance with the test
procedures of this standard and exposed to the associated mechanical, chemical and thermal stresses, the appliance shall
operate reliably and safely such that during normal operation no combustion gas posing a hazard can escape into the room
in which the appliance is installed nor can embers fall out. Non-combustible materials shall be used, except that it shall be
permissible to use combustible materials for the following applications:
- components or accessories fitted outside the appliance;
- internal components of controls and safety equipment;
- operating handles;
- electrical equipment.
No part of the appliance shall comprise any material known to be harmful.
When fired with solid mineral fuels, the appliance shall have a bottomgrate and an ashpan.
Component parts, which require periodic replacement and/or removal shall be either so designed or marked for identification
to ensure correct fitting.
NOTE 1 Because the entire heat dissipating surfaces of the appliance including the flue spigot/socket and the flue gas
connector are working surfaces, there is no requirement for limiting the surface temperature of the appliance.
NOTE 2 All operations which the user carries out, including loading and emptying of the appliance, adjusting controls and
de-ashing should be easy, safe and effective.
4.2.2 Cleaning of heating surfaces
All heating surfaces shall be accessible from the flue gas side for inspection and cleaning with brushes, scrapers or chemical
agents by means of sufficient cleaning openings.
4.2.3 Flue spigot or socket
For horizontal flue connection, the flue spigot/socket shall be designed to allow fitting, internal or external, over a length of at
least 40 mm, of a flue gas connector.
For vertical flue connection, the fitting shall either overlap by at least 25 mm or be designed to enable a gas tight connection
to be made between the chimney, the flue gas connector and the appliance. The method of connection to enable a gas tight
connection to be made shall be detailed in the appliance installation instructions.
4.2.4 Flueways
The size of the flueway in its minimum dimension shall be not less than 30 mm except for appliances designed to burn wood
only when it shall be permissible to reduce it to not less than 15 mm provided easy access door(s) are provided for viewing
and cleaning the whole of the flueways. It shall be possible to clean the flueways of the appliance completely using
commercially available tools or brushes, unless special tools or brushes are provided by the appliance manufacturer.
4.2.5 Ashpan and ash removal
A means for the removal of the ash residue from the appliance shall be provided. When an ashpan is provided, it shall be
capable of containing the combustion residue from two full charges of fuel whilst retaining sufficient space above to allow
adequate primary
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