SIST EN ISO 8437-4:2021/A1:2026

• Status: Published
• Public Enquiry End Date: 31-Oct-2022
• Publication Date: 27-May-2026
• ICS: 43.160 - Special purpose vehicles
• Technical Committee: IMKG - Machinery for agriculture and forestry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-May-2026
• Due Date: 01-Aug-2026
• Completion Date: 28-May-2026
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
  OJ Ref: L 7.9.2026 OJ Date: 07-Sep-2026
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: EN ISO 8437-4:2021/A1:2026 - Snow throwers - Safety requirements and test procedures - Part 4: Additional national and regional requirements - Amendment 1 (ISO 8437-4:2019/Amd 1:2026)

• Amends: SIST EN ISO 8437-4:2021 - Snow throwers - Safety requirements and test procedures - Part 4: Additional national and regional requirements (ISO 8437-4:2019)
• Effective Date: 01-Jul-2026

SIST EN ISO 8437-4:2021/A1:2026 is the Slovenian adoption of EN ISO 8437-4:2021/A1:2026, an amendment for snow throwers. It updates the European standard with additional national and regional requirements for combustion engine powered pedestrian-controlled and ride-on snow throwers, and it links the standard to EU machinery legislation through Annex ZA.

What does SIST EN ISO 8437-4:2021/A1:2026 specify?

SIST EN ISO 8437-4:2021/A1:2026 specifies additional national and regional requirements for combustion engine powered pedestrian-controlled and ride-on snow throwers. It is an amendment to EN ISO 8437-4:2021, and it is intended to be used together with ISO 8437-1, ISO 8437-2 and ISO 8437-3.

The document is organized as an amendment notice, a revised scope statement, replacement text for requirements in Tables 3 and 5, and updates to Annex A. Annex ZA gives the link between the European Standard and Directive 2006/42/EC.

Annex	What it covers
Annex ZA (informative)	Relationship between this European Standard and the essential requirements of Directive 2006/42/EC, including the conformity mapping and normative references table

What are the key requirements of SIST EN ISO 8437-4:2021/A1:2026?

SIST EN ISO 8437-4:2021/A1:2026 focuses on engine speed limitation, fixed guards, and noise-related information. In practice, it tells manufacturers what must be built in, what must be checked by inspection, and what test reference to use when documenting acoustic measurements.

• Engine speed control - Tables 3 and 5 require the snow thrower to be designed so that the engine cannot be sustained above the manufacturer’s maximum operating engine speed by use of a control or simple adjustments. For a manufacturer, this means the machine must resist easy tampering or adjustment into an over-speed condition.
• Fixed guards - The same tables require all fixed guards to be secured with fasteners that can only be opened or removed with tools. The fasteners must stay attached to the guard or the machine when the guard is removed. This matters because guards should remain serviceable without becoming loose parts.
• Guard retention - Where feasible, the guards should be designed so they cannot stay in place unless properly fastened. That helps prevent accidental operation with an incompletely secured guard.
• Compliance check - Compliance with the fixed-guard requirement is checked by inspection. This means the user of the standard needs a visible, documented design review rather than a complex test setup.
• Sound power level - Annex A.2 directs users to ISO 3744:1995 for determining sound power level. In practice, this fixes the acoustic method to use when sound power must be reported.
• Noise documentation - Annex A.6 requires a reference to the noise test code used for the tests. That helps keep the acoustic record traceable.
• EU machinery link - Annex ZA maps selected clauses to essential requirements of Directive 2006/42/EC. For EU market work, this is the part used to see which clauses support presumption of conformity when the standard is cited.

What terms does SIST EN ISO 8437-4:2021/A1:2026 define?

SIST EN ISO 8437-4:2021/A1:2026 uses a small set of practical technical terms that matter for design and testing.

• Maximum operating engine speed - the highest engine speed the manufacturer specifies for normal operation.
• Fixed guards - guards that are not meant to be opened in normal use and are secured with tool-removable fasteners.
• Sound power level - the noise output value measured for the machine as a source, rather than the noise at one position.
• Noise test code - the reference that identifies which noise test method was used.
• Presumption of conformity - the legal effect, in the EU context, of applying the cited normative clauses of the standard.
• Essential requirements - the safety requirements in Directive 2006/42/EC that Annex ZA maps to this standard.

Who uses SIST EN ISO 8437-4:2021/A1:2026?

SIST EN ISO 8437-4:2021/A1:2026 is used by snow thrower manufacturers, test laboratories, and compliance teams working on combustion engine powered pedestrian-controlled and ride-on machines. It is also relevant to quality managers, certification staff, and buyers who need to check whether a product design, test report, or technical file follows the European requirements.

What changed in SIST EN ISO 8437-4:2021/A1:2026 from the previous edition?

SIST EN ISO 8437-4:2021/A1:2026 amends EN ISO 8437-4:2021. The amendment replaces the scope paragraph, updates the engine-speed and fixed-guard rows in Tables 3 and 5, changes Annex A.2 to cite ISO 3744:1995 for sound power level determination, and revises Annex A.6 to require a reference to the noise test code used.

Which standards are used with SIST EN ISO 8437-4:2021/A1:2026?

SIST EN ISO 8437-4:2021/A1:2026 relies on several named standards for measurement, risk assessment, vibration, acoustics, and the other parts of the snow thrower series.

• ISO 3744 - sound power level determination for noise sources.
• ISO 4871 - declaration and verification of noise emission values.
• ISO 5008 - whole-body vibration measurement for agricultural wheeled tractors and field machinery.
• ISO 8437-1, ISO 8437-2, ISO 8437-3 - terminology, common tests, pedestrian-controlled snow throwers, and ride-on snow throwers.
• ISO 11201 - emission sound pressure levels at a workstation and specified positions.
• ISO 12100 - risk assessment and risk reduction principles for machinery design.
• ISO 16063 - calibration of vibration and shock transducers.
• ISO 20643 - principles for evaluating vibration emission of hand-held and hand-guided machinery.
• EN 1032 - testing mobile machinery to determine vibration emission values.
• EN ISO 14982 - electromagnetic compatibility test methods and acceptance criteria for agricultural and forestry machinery.

What does the SIST EN ISO 8437-4:2021/A1:2026 document contain?

SIST EN ISO 8437-4:2021/A1:2026 is a short amendment document rather than a full reissue of the base standard. It contains the revised scope, the replacement wording for the engine-speed and fixed-guard requirements in Tables 3 and 5, and the updated Annex A text for sound power measurement and noise test documentation. Annex ZA adds the EU machinery mapping and the table of normative references used for conformity and testing.

SLOVENSKI STANDARD
01-julij-2026
Snežne freze - Varnostne zahteve in preskusni postopki - 4. del: Dodatne
nacionalne in regionalne zahteve - Dopolnilo A1 (ISO 8437-4:2019/Amd 1:2026)
Snow throwers - Safety requirements and test procedures - Part 4: Additional national
and regional requirements - Amendment 1 (ISO 8437-4:2019/Amd 1:2026)
Schneefräsen - Sicherheitsanforderungen und Prüfverfahren - Teil 4: Informationen zu
nationalen und regionalen Bestimmungen - Änderung 1 (ISO 8437-4:2019/Amd 1:2026)
Chasse-neige - Exigences de sécurité et essais - Partie 4: Exigences nationales et
régionales additionnelles - Amendement 1 (ISO 8437-4:2019/Amd 1:2026)
Ta slovenski standard je istoveten z: EN ISO 8437-4:2021/A1:2026
ICS:
43.160 Vozila za posebne namene Special purpose vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 8437-4:2021/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2026
EUROPÄISCHE NORM
ICS 43.160
English Version
Snow throwers - Safety requirements and test procedures
- Part 4: Additional national and regional requirements -
Amendment 1 (ISO 8437-4:2019/Amd 1:2026)
Chasse-neige - Exigences de sécurité et essais - Partie Schneefräsen - Sicherheitsanforderungen und
4: Exigences nationales et régionales additionnelles - Prüfverfahren - Teil 4: Informationen zu nationalen
Amendement 1 (ISO 8437-4:2019/Amd 1:2026) und regionalen Bestimmungen - Änderung 1 (ISO
8437-4:2019/Amd 1:2026)
This amendment A1 modifies the European Standard EN ISO 8437-4:2021; it was approved by CEN on 21 April 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8437-4:2021/A1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive2006/42/EC aimed to be covered . 4

European foreword
This document (EN ISO 8437-4:2021/A1:2026) has been prepared by Technical Committee ISO/TC 23
"Tractors and machinery for agriculture and forestry" in collaboration with Technical Committee
CEN/TC 144 “Tractors and machinery for agriculture and forestry” the secretariat of which is held by
AFNOR.
This Amendment to the European Standard EN ISO 8437-4:2021 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by November 2026,
and conflicting national standards shall be withdrawn at the latest by November 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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,
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 the
United Kingdom.
Endorsement notice
The text of ISO 8437-4:2019/Amd 1:2026 has been approved by CEN as EN ISO 8437-4:2021/A1:2026
without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive2006/42/EC aimed to be covered
This European Standard has been prepared under a Commission’s standardization request “M/396
Mandate to CEN and CENELEC for Standardisation in the field of machinery" to provide one voluntary
means of conforming to essential requirements of Directive 2006/42/EC of the European Parliament
and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast).
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Annex I of Directive
2006/42/EC
The relevant Essential
Clause(s)/sub-clause(s) of this
Requirements of Directive Remarks/Notes
EN
2006/42/EC
5.1, 6.1 Table 3 (4.2.2.5)
1.1.2(a)
Table 5 (4.2.2.6)
1.1.2(c) 4.1,5.1,6.1
5.1, 6.1 Table 3 (4.2.2.5)
1.2.2. Control devices
Table 5 (4.2.2.6)
5.1, 6.1 Table 3 (4.3.1)
1.4.2.1. Fixed guards
Table 5 (4.3.1)
5.1, 6.1 Table 3 (4.9)
1.5.8. Noise
Table 5 (4.9)
5.1, 6.1 Table 3 (4.10)
1.5.9. Vibrations
Table 5 (4.10)
5.1, 6.1 Table 3 (4.8)
1.5.11. Radiation
Table 5 (4.8)
1.7. INFORMATION
1.7.3. Marking of machinery 4,1 Table 1 (5.1)
3.6.2. Marking 4.1 Table 1 (5.1)
Table ZA.2 — Normative references from clause 2 of this document and their corresponding
European publications
Column 4
Column 1 Column 2
Column 3
Reference in International
Corresponding European
Title
Clause 2 Standard Edition
Standard Edition
Acoustics — Determination
of sound power levels and
sound energy levels of noise
sources using sound
ISO 3744 ISO 3744:2010 EN ISO 3744:2010
pressure — Engineering
methods for an essentially
free field over a reflecting
plane
Acoustics — Declaration and
verification of noise emission
ISO 4871 ISO 4871:1996 EN ISO 4871:2009
values of machinery and
equipment
Agricultural wheeled
tractors and field
ISO 5008 ISO 5008:2002 machinery — Measurement See column 2
of whole-body vibration of
the operator
Snow throwers — Safety
requirements and test
ISO 8437-1:2019 ISO 8437-1:2019 procedures — Part 1: EN ISO 8437-1:2021
Terminology and common
tests
Snow throwers — Safety
requirements and test
ISO 8437-2:2019 ISO 8437-2:2019 procedures — Part 2: EN ISO 8437-2:2021
Pedestrian- controlled snow
throwers
Snow throwers — Safety
requirements and test
ISO 8437-3:2019 ISO 8437-3:2019 EN ISO 8437-3:2021
procedures — Part 3: Ride-
on snow throwers
Acoustics — Noise emitted
by machinery and
equipment — Determination
of emission sound pres
...