oSIST prEN 1-2:2023

SLOVENSKI STANDARD
oSIST prEN 1-2:2023
01-september-2023
Grelne naprave na tekoča goriva za stanovanjske stavbe - 2. del: Peči za ogrevanje
na tekoča goriva z uparjalnimi gorilniki in priključkom na dimnik
Residential liquid fuel burning appliances - Part 2: Flued oil stoves with vaporizing
burners
Häusliche Feuerstätten für flüssige Brennstoffe - Teil 2: Ölöfen mit
Verdampfungsbrenner und Schornsteinanschluss
Equipement de chauffage domestique à combustible liquide - Partie 2 : Poêles à huile
avec brûleurs à vaporisation et conduit de cheminée
Ta slovenski standard je istoveten z: prEN 1-2
ICS:
97.100.40 Grelniki na tekoče gorivo Liquid fuel heaters
oSIST prEN 1-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 1-2:2023

---------------------- Page: 2 ----------------------
oSIST prEN 1-2:2023


DRAFT
EUROPEAN STANDARD
prEN 1-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

June 2023
ICS 97.100.40 Will supersede EN 1:1998
English Version

Residential liquid fuel burning appliances - Part 2: Flued
oil stoves with vaporizing burners
Equipement de chauffage domestique à combustible Häusliche Feuerstätten für flüssige Brennstoffe - Teil 2:
liquide - Partie 2 : Poêles à huile avec brûleurs à Ölöfen mit Verdampfungsbrenner und
vaporisation et conduit de cheminée Schornsteinanschluss
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 46.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1-2:2023 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Characteristics . 5
4.1 Protection of combustible materials . 5
4.2 Carbon monoxide emission (CO) . 6
4.3 Nitrogen oxides (NO ) emissions . 6
x
4.4 Emission of organic gaseous compounds (OGC) . 7
4.5 Smoke number . 7
4.6 Safety and accessibility in use . 7
4.6.1 General. 7
4.6.2 Flue gas outlet temperature at nominal heat output . 7
4.6.3 Flue gas outlet temperature at part load heat output . 7
4.6.4 Minimum flue draught at nominal heat output . 7
4.6.5 Minimum flue draught at part load heat output . 7
4.6.6 Flue gas mass flow at nominal heat output . 7
4.6.7 Flue gas mass flow at part load heat output . 8
4.6.8 Fire safety of installation to the chimney . 8
4.7 Energy economy and heat retention . 8
4.7.1 Space heat output at nominal heat output . 8
4.7.2 Water heat output, if existing at nominal heat output . 8
4.7.3 Efficiency at nominal heat output . 8
4.7.4 Space heat output at part load heat output . 8
4.7.5 Water heat output, if existing at part load heat output . 9
4.7.6 Efficiency at part load heat output . 9
4.7.7 Seasonal space heating efficiency at appliance’s nominal heat output . 9
4.7.8 Energy efficiency . 9
4.7.9 Electric power consumption at nominal heat output, if existing . 10
4.7.10 Electric power consumption at part load heat output, if existing . 10
4.7.11 Standby mode power consumption, if existing . 10
4.8 Environmental sustainability . 10
5 Descriptive features . 12
5.1 Data for potential use with room ventilation systems: type of appliance (in relation to its
tightness to the room) . 12
5.2 Data for the building's statics: appliance's mass . 12
5.3 Materials and construction elements . 12
5.3.1 General. 12
5.3.2 General stresses . 12
5.3.3 Integral boiler or heat exchanger . 12
5.4 Risk of burning fuel falling out. 13
5.5 Temperature rise in the fuel storage . 13
5.6 Temperature rise of the operating components . 13
5.7 Spillage of flue gases into the room . 13
2

---------------------- Page: 4 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
5.7.1 Possible spillage of CO, if relevant for the fuel type . 13
5.7.2 Open operation . 13
5.8 Cleanability . 13
5.8.1 Heating surfaces . 13
5.8.2 Flueways . 13
5.8.3 Ashpan . 13
5.8.4 Bottomgrate . 13
5.8.5 Damper . 13
5.8.6 Fan-cut-out-device . 13
5.9 Strength and leak tightness of boiler shells . 14
6 Assessment and verification of constancy of performance - AVCP . 14
6.1 General . 14
6.2 Assessment of performance . 14
6.2.1 General . 14
6.2.2 Test samples, testing and compliance criteria . 15
6.3 Verification of constancy of performance. 16
6.3.1 Factory production control (FPC) . 16
Annex ZA (informative) Relationship of this European Standard with Regulation (EU) No.
305/2011 . 19

3

---------------------- Page: 5 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
European foreword
This document (prEN 1-2:2023) has been prepared by Technical Committee CEN/TC 46 “Fireplaces for
liquid fuels”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1:1998 and EN 1:1998/A1:2007.
In relation to EN 1:1998 and EN 1:1998/A1:2007, the following technical changes have been made:
— completely revised according to the requirements of M/577;
— energy efficiency and energy class labelling and seasonal space heating efficiency added;
— requirements for environmental sustainability added.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association.
For relationship with EU Regulation 305/2011 see informative Annex ZA, which is an integral part of this
document.
The structure of EN 1, Residential liquid fuel burning appliances, is as follows:
— Part 1: General requirements and test methods;
— Part 2: Flued oil stoves with vaporizing burners;
— Part 3: Flued oil stoves with vaporizing burners and boiler;
— Part 4: Flued ethanol stoves.

4

---------------------- Page: 6 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
1 Scope
This document is applicable to oil stoves. These appliances have one or more vaporizing burners and a
nominal heating capacity of not more than 15 kW and are equipped either with a draught regulator or a
combustion air limiter.
The intended use of the appliances is space heating in residential buildings.
This document is also applicable to appliances with fan assisted vaporizing burners.
According to the type of fuels used in the country of destination, the appliances are supplied for use with
either:
2
— fuel oil with a maximum kinematic viscosity of 6,0 mm /s at 20 °C;
— or kerosene with a flash point of not less than 40 °C.
This document is not applicable for:
— built-in appliances;
— appliances equipped with an atomizing burner;
— appliances incorporating a boiler or connected to a water system.
This document specifies procedures for assessment and verification of constancy of performance (AVCP)
of characteristics of flued oil stoves with vaporizing burners.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
prEN 1-1:2023, Residential liquid fuel burning appliances — Part 1: General requirements and test methods
EN 15804:2012+A2:2019, Sustainability of construction works — Environmental product declarations —
Core rules for the product category of construction products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 1-1:2023 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Characteristics
4.1 Protection of combustible materials
The performance of the appliance in relation to protection of combustible materials shall be determined
in accordance with prEN 1-1:2023, 5.8.
5

---------------------- Page: 7 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
When tested in accordance with prEN 1-1:2023, A.7.2, the protection measure(s) as specified according
to Table 1 shall be given as minimum distance to combustible materials and if appropriate as material
type and thickness of protective insulation material.
The protection measures as specified shall be given in [mm] as an integer.
Table 1 — Protection of combustible materials
Protection measure Declared clearance distance to Protective
combustible material or thickness insulation material
of protective insulation material if any
 [mm]
Minimum distance to  -
combustibles – floor
Minimum distance to  -
combustibles – walls
(side/rear)
Protective insulation
material (s)

4.2 Carbon monoxide emission (CO)
The performance of the appliance in relation to carbon monoxide emission at nominal heat output and at
part load heat output (if part load is specified) shall be determined in accordance with prEN 1-1:2023,
5.12.3.
The CO value if specified at nominal heat output and at part load heat output (if part load is specified) is
to be given in [mg/MJ] as an integer.
4.3 Nitrogen oxides (NO ) emissions
x
The performance of the appliance in relation to nitrogen oxides emissions at nominal heat output and at
part load heat output (if part load is specified) shall be determined in accordance with prEN 1-1:2023,
5.12.4.
The NO value if specified at nominal heat output and at part load heat output (if part load is specified)
x
is to be given in [mg/kWh ] as an integer.
input
When tested in accordance with prEN 1-1:2023, A.7.2.1 the NO emissions at nominal heat output shall
x
not exceed the threshold level as given in Table 2.
Table 2 — Threshold levels for NO emission (expressed as NO )
x 2
Appliance type Threshold level at 13 % O
2
130 mg/kWh
closed fronted liquid fuel local space heaters
input

NOTE 1 mg/MJ corresponds to 3,6 mg/kWh.
6

---------------------- Page: 8 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
4.4 Emission of organic gaseous compounds (OGC)
The performance of the appliance in relation to organic gaseous compounds emission at nominal heat
output and at part load heat output (if part load is specified) shall be determined in accordance with
prEN 1-1:2023, 5.12.5.
The OGC value if specified at nominal heat output and at part load heat output (if part load is specified)
is to be given in [mg/MJ] as an integer.
4.5 Smoke number
The performance of the appliance in relation to the smoke number at nominal heat output and at part
load heat output (if part load is specified) shall be determined in accordance with prEN 1-1:2023, 5.12.2.
The smoke number if specified at nominal heat output and at part load heat output (if part load is
specified) is to be given as an integer.
4.6 Safety and accessibility in use
4.6.1 General
The data for the installation to a chimney are to be evaluated at nominal heat output. Specific data are to
be evaluated at safety test heat output. Additional data are to be evaluated at part load heat output, if part
load is specified.
4.6.2 Flue gas outlet temperature at nominal heat output
The performance of the appliance in relation to flue gas outlet temperature at nominal heat output shall
be determined in accordance with prEN 1-1:2023, 5.6.
The value of the flue gas outlet temperature for the installation of the appliance to a chimney if specified
is to be given in [°C] as an integer.
4.6.3 Flue gas outlet temperature at part load heat output
The performance of the appliance in relation to flue gas outlet temperature at part load heat output (if
part load is specified) shall be determined in accordance with prEN 1-1:2023, 5.6.
The value of the flue gas outlet temperature at part load heat output (if part load is specified) for the
installation of the appliance to a chimney if specified is to be given in [°C] as an integer.
4.6.4 Minimum flue draught at nominal heat output
The performance of the appliance in relation to the minimum flue draught at nominal heat output shall
be determined in accordance with prEN 1-1:2023, 5.13.
The value of the minimum flue draught if specified at nominal heat output for the installation of the
appliance to a chimney is to be given in [Pa] as an integer.
4.6.5 Minimum flue draught at part load heat output
The performance of the appliance in relation to the minimum flue draught at part load heat output (if
part load is specified) shall be determined in accordance with prEN 1-1:2023, 5.13.
The minimum value of the flue draught if specified at part load heat output (if part load is specified) for
the installation of the appliance to a chimney is to be given in [Pa] as an integer
4.6.6 Flue gas mass flow at nominal heat output
The performance of the appliance in relation to the flue gas mass flow at nominal heat output shall be
determined in accordance with prEN 1-1:2023, 5.14.
7

---------------------- Page: 9 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
The flue gas mass flow value if specified at nominal heat output for the installation of the appliance to a
chimney is to be given in [g/s] with 1 decimal.
4.6.7 Flue gas mass flow at part load heat output
The performance of the appliance in relation to the flue gas mass flow at part load heat output (if part
load is specified) shall be determined in accordance with prEN 1-1:2023, 5.14.
The flue gas mass flow value if specified at part load heat output (if part load is specified) for the
installation of the appliance to a chimney is to be given in [g/s] with 1 decimal.
4.6.8 Fire safety of installation to the chimney
The performance of the appliance in relation to the flue gas temperature (mean value) at safety test shall
be determined in accordance with prEN 1-1:2023, A.7.2.1.
4.7 Energy economy and heat retention
4.7.1 Space heat output at nominal heat output
The performance of the appliance in relation to space heat output at nominal heat output shall be
determined in accordance with prEN 1-1:2023, 5.15.
The space heat output of the appliance if specified at nominal heat output is to be given in [kW] with 1
decimal.
For the proper performance of the appliance the following shall be considered as well for those essential
characteristics and descriptive features assessed during the nominal heat output test prEN 1-1:2023,
A.7.2.1.
Additional devices, such as filters, oil regulators, safety devices, fans for the supply of combustion air, fuel
lines, storage tanks, oil level indicators, drip trays, flue gas outlet components, draught regulators and
combustion air limiters and automatic burners for the safety or function of the appliance may be present.
Some of these devices are optional, but if present their influence on the performance of the appliance
shall be checked according to prEN 1-1:2023, 4.4, 4.5, 4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.15 and 4.18.
4.7.2 Water heat output, if existing at nominal heat output
The performance of the appliance in relation to water heat output if existing at nominal heat output is
according to the scope not applicable as this document does not apply to appliances with water-bearing
parts or connection to a water system.
4.7.3 Efficiency at nominal heat output
The performance of the appliance in relation to efficiency at nominal heat output shall be determined in
accordance with prEN 1-1:2023, 5.4.
The efficiency of the appliance if specified at nominal heat output is to be given in [%] as an integer.
4.7.4 Space heat output at part load heat output
The performance of the appliance in relation to space heat output at part load heat output (if part load is
specified) shall be determined in accordance with prEN 1-1:2023, 5.15.
The space heat output of the appliance if specified at part load heat output (if part load is specified is to
be given in [kW] with 1 decimal.
For the proper performance of the appliance the following shall be considered as well for those essential
characteristics and descriptive features assessed during the part load heat output test prEN 1-1:2023,
A.7.2.2.
8

---------------------- Page: 10 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
Additional devices, such as filters, oil regulators, safety devices, fans for the supply of combustion air, fuel
lines, storage tanks, oil level indicators, drip trays, flue gas outlet components, draught regulators and
combustion air limiters and automatic burners for the safety or function of the appliance may be present.
Some of these devices are optional, but if present their influence on the performance of the appliance
shall be checked according to prEN 1-1:2023, 4.4, 4.5, 4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.15 and 4.18.
4.7.5 Water heat output, if existing at part load heat output
The performance of the appliance in relation to water heat output if existing at part load heat output is
according to the scope not applicable as this document does not apply to appliances with water-bearing
parts or connection to a water system.
4.7.6 Efficiency at part load heat output
The performance of the appliance in relation to efficiency at part load heat output (if part load is specified)
shall be determined in accordance with prEN 1-1:2023, 5.4.
The efficiency of the appliance if specified at part load heat output (if part load is specified) is to be given
in [%] as an integer.
4.7.7 Seasonal space heating efficiency at appliance’s nominal heat output
The performance of the appliance in relation to seasonal space heating efficiency at nominal heat output
shall be determined in accordance with prEN 1-1:2023, 5.4.2.
The seasonal space heating efficiency of the appliance if specified at nominal heat output is to be given in
[%] as an integer.
When tested in accordance with prEN 1-1:2023, 5.4.2 the seasonal space heating efficiency at nominal
heat output shall not underrun the threshold levels as given in Table 3.
Table 3 — Threshold level of seasonal space heating energy efficiency
Appliance type Threshold level
closed fronted liquid fuel local space heaters 72 %

4.7.8 Energy efficiency
The performance of the appliance in relation to energy efficiency classification shall be determined in
accordance with prEN 1-1:2023, 5.4.3 and 5.4.4.
The energy efficiency classification of the appliance if specified shall be determined according to Table 4.
9

---------------------- Page: 11 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
Table 4 — Energy efficiency classification based on the energy efficiency index (EEI)
Energy efficiency class Energy efficiency index (EEI)
A++ EEI ≥ 130
A+ 107 ≤ EEI < 130
A 88 ≤ EEI < 107
B 82 ≤ EEI < 88
C 77 ≤ EEI < 82
D 72 ≤ EEI < 77
E 62 ≤ EEI < 72
F 42 ≤ EEI < 62
G EEI < 42

4.7.9 Electric power consumption at nominal heat output, if existing
The performance of the appliance in relation to electric power consumption at nominal heat output shall
be determined in accordance with prEN 1-1:2023, 5.11.
The electric power consumption of the appliance if specified at nominal heat output is to be given in [kW]
with 3 decimals.
4.7.10 Electric power consumption at part load heat output, if existing
The performance of the appliance in relation to electric power consumption at part load heat output (if
part load is specified) shall be determined in accordance with prEN 1-1:2023, 5.11.
The electric power consumption of the appliance if specified at part load heat output (if part load is
specified) is to be given in [kW] with 3 decimals.
4.7.11 Standby mode power consumption, if existing
The performance of the appliance in relation to standby mode power consumption at standby mode
(where appropriate) shall be determined in accordance with prEN 1-1:2023, 5.11.
The standby mode power consumption of the appliance if specified is to be given in [kW] with 3 decimals
4.8 Environmental sustainability
All relevant elements of the performance related to the whole life cycle of the appliance shall be identified
and enumerated on the basis on the information modules of EN 15804:2012+A2:2019.
The necessary environmental sustainability information shall be determined to enable the life cycle
analysis of the appliance concerned and the declaration of its performance in relation to the essential
characteristic environmental sustainability. This shall comprise in particular the definition of the
scenarios required for this complete period, including the reference service life, where appropriate.
The performance of the appliance in relation to the environmental sustainability shall be determined in
accordance with prEN 1-1:2023, Clause 7.
The environmental sustainability elements are given in Table 5.
10

---------------------- Page: 12 ----------------------
oSIST prEN 1-2:2023
prEN 1-2:2023 (E)
Table 5 — Elements for the environmental sustainability
Environmental sustainability elements to be given in
Global Warming Potential total (GWP-total) kg CO equivalent
2
Global Warming Potential (GWP-fossil) kg CO equivalent
2
Global Warming Potential (GWP-biogenic) kg CO equivalent
2
Global Warming Potential land use and land use change (GWP-luluc) kg CO equivalent
2
Depletion potential of the stratospheric ozone layer (ODP) kg CFC 11 equivalent
Acidification potential, Accumulated Exceedance (AP) +
mol H equivalent
Eutrophication potential, Fraction of
...