prEN 15250 rev

SLOVENSKI STANDARD
01-november-2012
1DSUDYHQDWUGQDJRULYDNLSRþDVLRGGDMDMRWRSORWR=DKWHYHLQSUHVNXVQHPHWRGH
Slow release appliances fired by solid fuel - Requirements and test methods
Speicherfeuerstätten für feste Brennstoffe - Anforderungen und Prüfverfahren
Appareils de chauffage à combustible solide à libération lente - Exigences et méthodes
d'essai
Ta slovenski standard je istoveten z: prEN 15250 rev
ICS:
97.100.30 Grelniki na trdo gorivo Solid fuel heaters
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2012
ICS 97.100.30 Will supersede EN 15250:2007
English Version
Slow release appliances fired by solid fuel - Requirements and
test methods
Appareils de chauffage à combustible solide à libération Speicherfeuerstätten für feste Brennstoffe - Anforderungen
lente - Exigences et méthodes d'essai und Prüfverfahren
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 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, 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.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15250 rev:2012: E
worldwide for CEN national Members.

prEN 15250:2012 (E)
Contents Page
Foreword . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Classification of appliances and system boundary for room sealed appliances . 15
4.1 Classification of appliances . 15
4.2 System boundary . 16
5 Materials, design and construction . 16
5.1 Production documentation . 16
5.2 Construction . 17
5.2.1 General construction. 17
5.2.2 Durability . 18
5.2.3 Cleaning of heating surfaces . 20
5.2.4 Flue spigot or socket. 20
5.2.5 Flueways . 20
5.2.6 Ashpan and ash removal . 20
5.2.7 Bottomgrate . 20
5.2.8 Combustion air supply . 21
5.2.9 Control of flue gas . 21
5.2.10 Firedoors and charging doors . 21
5.2.11 Flue bypass device . 21
5.2.12 Front firebars and/or deepening plate . 21
5.2.13 Integral boiler . 22
5.2.14 Boilers constructed of cast iron . 24
5.2.15 Water side connections . 25
5.2.16 Heat exchangers that are not directly in contact with fire or flue gases . 27
5.2.17 Room sealed appliances . 27
6 Safety . 27
6.1 Temperature rise in the fuel storage container . 27
6.2 Temperature rise of the operating components . 27
6.3 Temperature of adjacent combustible materials . 27
6.4 Maximum flue gas temperature during safety test (proposal) . 27
6.5 Safety test of ducted air appliances . 28
6.6 Electrical safety . 28
6.7 Safety devices for appliances fitted with a boiler . 28
6.7.1 Appliances intended for open systems. 28
6.7.2 Appliances intended for sealed systems . 28
6.8 Safety devices for appliances fitted with a heat exchangers that are not directly in contact
with fire . 28
7 Performance . 28
7.1 Flue gas temperature . 28
7.2 Carbon monoxide emission . 28
7.3 Hydrocarbon and NO emissions . 29
x
7.4 Particulate emissions . 29
7.5 Efficiency . 29
7.6 Flue draught . 29
7.7 Refuelling intervals. 29
7.8 Thermal storage capacity . 29
8 Appliance instructions . 30
8.1 General . 30
prEN 15250:2012 (E)
8.2 Installation instructions . 30
8.3 User operating instructions . 31
9 Marking . 32
10 Evaluation of conformity . 33
10.1 General . 33
10.2 Type testing . 34
10.2.1 Initial type testing . 34
10.2.2 Further type testing . 35
10.3 Factory production control (FPC) . 37
10.3.1 General . 37
10.3.2 Raw materials and components . 37
10.3.3 Control of inspection, measuring and test equipment . 37
10.3.4 Process control . 37
10.3.5 Product inspection, testing and evaluation . 38
10.3.6 Non-conforming products . 39
10.3.7 Corrective and preventive action . 39
10.3.8 Handling, storage, packaging, preservation and delivery . 39
10.3.9 Additional requirements for the production control of roomsealed appliances . 39
Annex A (normative) Test methods. 41
A.1 Test environment . 41
A.1.1 Ambient room temperature . 41
A.1.2 Cross-draught . 41
A.1.3 External sources . 41
A.2 Test assembly . 41
A.2.1 General . 41
A.2.2 Trihedron . 42
A.2.3 Measurement section . 42
A.2.4 Connection of appliance to measurement section . 43
A.2.5 Measurement of appliance surface temperature for slow heat release appliances . 43
A.3 Set up for measuring water heating output . 44
A.4 Measuring of ducted air heat output . 45
A.5 Measuring of nominal heat output . 45
A.6 Safety tests of roomsealed slow heat release appliance . 45
A.6.1 General . 45
A.6.2 Appliance leak tightness tests . 45
A.7 Measurement equipment . 48
A.8 Test procedures . 48
A.8.1 Appliance installation . 48
A.8.2 Fuel load . 49
A.8.3 Fuelling and de-ashing the fire. 49
A.8.4 Flue gas losses . 49
A.8.5 Combustible heat losses in the residue . 50
A.8.6 Burning rate performance test . 50
A.8.7 Temperature safety test for woodburning and multifuel appliances . 51
A.9 Test results . 51
A.10 Calculation methods . 52
A.10.1 Notations and units used . 52
A.10.2 Equations. 54
A.11 Test report . 58
Annex B (normative) Test fuels and recommended fuels . 70
B.1 General . 70
B.2 Test fuel . 70
B.2.1 Selection of test fuel . 70
B.2.2 Storage, preparation and analysis . 70
B.3 Tests for recommended fuels . 71
B.3.1 Basis of testing . 71
B.3.2 Test methods and criteria . 71
Annex C (informative) Calculation of an approximate heat release curve against time . 77
prEN 15250:2012 (E)
Annex D (informative) Calculation of flue gas temperatures on basis of DIN 4705, EN 13384-1 and
EN 15287 . 80
Annex E (normative) Possibilities of installation for roomsealed appliances . 83
Annex F (informative) Example of a suitable arrangement for measuring the leakage rate of a
roomsealed appliance . 85
Annex G (normative) Measuring procedure for nitrogen oxides (NOx) . 86
G.1 General procedure . 86
G.2 Measuring principles of analysers . 87
G.2.1 Chemiluminescence method . 87
G.2.2 Non-dispersive infrared (NDIR) method . 88
G.2.3 Other methods . 89
G.3 Calculation method . 89
Annex H (normative) Measuring procedure for THC . 90
H.1 General procedure . 90
H.2 Equipment . 90
H.3 Calculation of THC . 90
Annex I (normative) Measuring procedures for particulate matter (PM) . 92
I.1 Principle . 92
I.2.1 Test set-up . 92
I.2.1.1  Sampling train . 92
I.2.2 Instrumentation . 94
I.2.2.1 Ambient temperature measurement system . 94
I.2.2.2 Ambient air pressure measurement system . 94
I.2.2.3 Micro balance . 94
I.2.3 Test procedure . 94
I.2.3.1 Preparation . 94
I.2.3.6 Analysis . 95
I.2.3.7 Overall blank sample . 95
I.2.4 Calculations . 95
I.3.1 General . 96
I.3.2  Principle . 97
I.3.3 Apparatus . 97
I.3.3.1 Dilution tunnel . 97
I.3.4 Particulate emission sampling train . 101
I.3.5 Dilution ratio measurement . 103
I.3.6 Reagents . 103
I.3.7 Instrumentation . 104
I.3.8 Test procedure . 104
I.3.8.1 Preparation of dilution tunnel . 104
I.3.8.2 Preparation of emission sampling train . 104
I.3.8.3 Measurement . 105
I.3.8.3.1 Test cycle . 105
I.3.8.3.2 Determination of sample particulate masses . 105
I.3.9 Calculations . 106
I.3.9.1 Volume of gas sampled in the emission sampling train . 106
I.3.9.1.1 Volume of gas sampled . 106
I.3.9.1.2 Moisture content of gas sampled . 106
I.3.9.2 Volume of gas in the dilution tunnel. 107
I.3.9.2.1 Volume of gas with water vapour . 107
I.3.9.2.2 Volume of gas dry . 107
I.3.9.2.3 Volume of gas dry at standard condition . 107
I.3.9.3 Portion of dilution tunnel to sampling train gas volume . 108
I.3.9.4 Total particulate mass sampled . 108
I.3.9.5 Total particulate mass emitted . 108
I.3.9.6 Dilution ratio . 109
I.3.9.7 Particulate emission concentration . 109
I.3.9.8 Solid particle fraction at 13% O . 110
prEN 15250:2012 (E)
Annex ZA (informative) Clauses of this European standard addressing the provisions of the EU
Construction Products Directive . 111
ZA.1 Scope and relevant characteristics . 111
ZA.2 Procedure for the attestation of conformity of slow heat release appliances fired by solid
fuels . 113
ZA.2.1 System of attestation of conformity . 113
ZA.2.2 EC Declaration of conformity . 114
ZA.3 CE Marking and labelling . 114
Bibliography . 120

prEN 15250:2012 (E)
Foreword
This document (prEN 15250:2012) 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.
This document will supersede EN 15250:2007.
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.

This document is a revision of the published standard EN 15250:2007 following comments received at its
review.
prEN 15250:2012 (E)
1 Scope
This European Standard is applicable to residential freestanding hand fuelled intermittent burning slow heat
release appliances having thermal storage capacity such that they can provide heat for an extended period of
time after the fire has gone out. 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 as they are not covered by the scope of this standard.
This European standard is also applicable to appliances which are designed for operating under room sealed
conditions and which are intended to be installed into a chimney not serving any other appliances.
NOTE: Appliances which receive their combustion air from outside by means of a pipe system which is not air tight are not
considered room sealed in accordance with this standard.
This European Standard specifies requirements relating to the design, manufacture, construction, safety and
performance (efficiency and emissions) together with associated test methods and test fuels for residential slow
heat release appliances fired by solid fuel (hereafter referred to as “appliances”), and provides instructions for
them. Furthermore, it also gives provisions for evaluation of conformity i.e. initial type testing (ITT) and factory
production control (FPC) and marking of these appliances.
These appliances provide heat by radiation and/or convection into the space where they are installed.
Additionally if fitted with a boiler or other heat exchanger these appliances may also provide domestic hot water
and/or central heating.
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 specifically
intended to be hand fuelled only may also be burned either on the existing appliance bottom grate 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. This European standard is also not
applicable to appliances which are designed to be operated with ventilating systems which have pressure below
(– 15 Pa) in relation to the outside atmosphere as measured in the room where the appliance is installed.
This European Standard covers also the NO , OGC/total hydrocarbons and particulate matter emission test
x
methods; however it does not contain any limit values for these emissions.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable
for its application. For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies. s
CEN/TS 15883:2009, Residential solid fuel burning appliances - Emission test methods
EN 1561:2011, Founding - Grey cast irons
EN 1563:2011, Founding - Spheroidal graphite cast iron
EN 1856-1, Chimneys - Requirements for metal chimneys. System chimney products;
EN 1856-2, Chimneys - Requirements for metal chimneys - Part 2: Metal flue liners and connecting flue pipes;
EN 10025:1993, Hot rolled products of non-alloy structural steels - Technical delivery conditions
EN 10027-2:1992, Designation systems for steels - Part 2: Numerical system
EN 10028-2:2009, Flat products made of steels for pressure purposes: -Part 2:Non-alloy and alloy steels with
specified elevated temperature properties
EN 10029:2010, Hot rolled steel plates 3 mm thick or above - Tolerances on dimensions, shape and mass
EN 10088-2:2005, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion
resisting steels for general purposes
EN 10111:2008, Continuously hot-rolled low carbon steel sheet and strip for cold forming - Technical delivery
conditions
EN 10120:2008, Steel sheet and strip for welded gas cylinders
prEN 15250:2012 (E)
EN 13063-3, Chimneys - System chimneys with clay/ceramic flue liners - Part 3: Requirements and test
methods for air flue system chimneys;
EN 14774-1, Solid biofuels - Determination of moisture content - Oven dry method - Part 1: Total moisture -
Reference method
EN 14775:2009, Solid biofuels - Determination of ash content
EN 14918:2009, Solid biofuels - Determination of calorific value
EN 14989-2, Chimneys - Requirements and test methods for metal chimneys and material independent air
supply ducts for roomsealed heating applications - Part 2: Flue and air supply ducts for room sealed appliances
EN 15104:2011, Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental
methods
EN 15148:2009, Solid biofuels - Determination of the content of volatile matter
ISO 7-1: 1994, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions,
tolerances and designation
ISO 7-2: 2000, Pipe threads where pressure-tight joints are made on the threads - Part 2: Verification by means
of limit gauges
ISO 228-1: 2000, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions,
tolerances and designation
ISO 228-2: 1987, Pipe threads where pressure-tight joints are not made on the threads - Part 2: Verification by
means of limit gauges
ISO 331, Coal - Determination of moisture in the analysis sample - Direct gravimetric method
ISO 334, Solid mineral fuels - Determination of total sulfur - Eschka method
ISO 351, Solid mineral fuels - Determination of total sulfur - High temperature combustion method
ISO 501, Hard coal - Determination of the crucible swelling number
ISO 562, Hard coal and coke - Determination of volatile matter
ISO 609, Solid mineral fuels - Determination of carbon and hydrogen - High temperature combustion method
ISO 687, Solid mineral fuels - Coke - Determination of moisture in the general analysis test sample
ISO 1171, Solid mineral fuels - Determination of ash
ISO 1928, 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
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
absorption
incorporation of a substance into the body of a liquid or solid
3.2
air grilles
components in the inlet and outlet openings to distribute and direct convection air flow
3.3
air inlet control
manual or automatic device which controls the quantity of air supplied for combustion
prEN 15250:2012 (E)
3.4
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
3.5
ash content of the fuel
solid matter remaining after the complete combustion of solid fuel
3.6
ashpan
removable receptacle shaped to receive the residue falling from the firebed
3.7
ashpit
enclosed chamber designed to receive the residue or the ashpan
3.8
ashpit loss
part of the residue which is combustible
3.9
basic firebed
quantity of glowing embers which ensures ignition of the test fuel to be charged
Note 1 to entry: The basic firebed may be specified by the manufacturer.
3.10
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
3.11
boiler
vessel in which water is heated, intended for fitting in or forming an integral part of a solid fuel appliance
3.12
boiler flueway
portion of the flueway formed wholly or in part by the surfaces of the boiler
3.13
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
3.14
bottomgrate bars; firebars
bars supporting the fuelbed, separate or integral with a surrounding frame
3.15
burn rate
The mass of test fuel burnt per hour on dry fuel basis.

3.16
calibration
set of operations that establish the relationship between values of quantities indicated by a measuring instrument or
measuring system, or values represented by a material measure or a reference material, and the corresponding values
realized by standards
prEN 15250:2012 (E)
3.17
charging door
door which covers the refuelling opening
3.18
combustion air
air supplied to the firebox which is entirely or partially used to burn the fuel
3.19
combustion air inlet
Integral component of the fireplace for the connection to the combustion air pipe.
3.20
combustion gases
compounds in gaseous form produced inside an appliance when fuel is burned
3.21
constant volume sampling
Method to sample all exhaust gases of an appliance at constant flow rate by diluting with air.

3.22
de-ashing
process of clearing a fuelbed and discharging the residue into the collecting receptacle
3.23
de-ashing mechanism
device to agitate or disturb the ash to facilitate its removal from the firebed
Note 1 to entry: It may also be used to change the bottomgrate operating position on some appliances.
3.24
dew point
temperature at, or below which, the condensation from the gas phase will occur
3.25
dilution ratio
The dilution ratio is defined as the volume ratio of the total diluted gas volume and the undiluted flue gas volume at standard
conditions on dry basis.
3.26
dilution tunnel
Sampling duct to allow constant volume sampling of the appliance exhaust gases with dilution air.
3.27
dilution tunnel flow volume
The total volume of the diluted gas in the dilution tunnel during a test cycle.
3.28
dilution tunnel gas flow rate
Flow rate of the diluted gases in the dilution tunnel.

3.29
direct water system
hot water system in which stored domestic hot water is heated directly by hot water circulating from the boiler
3.30
draught regulator
inlet device for admission of air downstream of the firebed, enabling the flue draught to be controlled
prEN 15250:2012 (E)
3.31
efficiency
ratio of total heat output to the total heat input during the burning period expressed as a percentage
3.32
emission sampling section
Section in the dilution tunnel where the particulate emission sampling train is attached.
3.33
extraction fan
Fan installed in the dilution tunnel downstream of the emission sampling section capable of gathering and moving all flue-
gases and entrained dilution air from the dilution tunnel extraction cowl to the dilution tunnel exhaust having sufficient flow to
maintain dilution rate specifications.
3.34
firebox; combustion chamber
part of the appliance in which the fuel is burned
3.35
firebox opening
aperture in the firebox through which an appliance may be fuelled

3.36
firedoor
door through which the fire may be viewed and which may be opened to allow refuelling of the firebed
3.37
flue by-pass device
device which in the open position allows flue gases to pass directly to the flue spigot/socket
Note 1 to entry: This can be used as a preheating aid to overcome chimney condensation.
3.38
flue damper
mechanism to change the flow of the combustion gases
3.39
flue draught
differential between the static pressure in the place of installation and the static pressure at the flue gas measurement point
3.40
flue gases
gaseous compounds leaving the appliance flue spigot or socket and entering the flue gas connector
3.41
flue gas connector
duct through which flue gases are conveyed from the flue spigot of the appliance into the chimney flue
3.42
flue gas mass flow
mass of flue gas drawn off from the appliance per unit of time
3.43
flue gas temperature
temperature of the flue gas at the specified point in the measurement section
3.44
flue outlet
Integral component of the fireplace for the connection to the connector
prEN 15250:2012 (E)
3.45
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
3.46
flueway
part of an appliance designed to convey combustion gases from the firebox to the flue spigot/socket
3.47
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
3.48
gas sample
portion of gaseous material on which observations can be made in order to provide data on the gaseous material from which
it has been removed
Note 1 to entry: A sample is taken as being representative of the gaseous material if the same observations are supplied
on any other samples taken from this gaseous material to furnish the same data within preset intervals.
3.49
hydrocarbon (THC) emissions
When measured in accordance with A.4.7, at the manufacturer’s declared nominal heat output the mean hydrocarbon
concentration calculated to 13 % oxygen (O2) content in the flue gas shall be measured and the value shall be given by the
manufacturer.
3.50
indirect water system
hot water system in which stored domestic hot water is heated by a primary heater through which hot
water from the boiler is circulated without mixing of the primary (heating) water and the stored
domestic hot water
3.51
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
3.52
leak tightness
Volumetric flow that might spill into the installation room, at a certain inside pressure, through parts of the fireplace that are
not tight, maybe at the connector or the combustion air pipe. The air flow rate that shall be supplied, when a defined
overpressure in the fireplace is reached, in order to keep this overpressure.
Note 1 to entry: In this case
...