SIST EN 721:2020
(Main)Leisure accommodation vehicles - Safety ventilation requirements
Leisure accommodation vehicles - Safety ventilation requirements
This document specifies the minimum safety ventilation requirements for leisure accommodation vehicles.
It provides alternative methods of calculation or testing of safety ventilation.
Bewohnbare Freizeitfahrzeuge - Anforderungen an die Sicherheitslüftung
Dieses Dokument legt die Mindestanforderungen an die Sicherheitslüftung von bewohnbaren Freizeit-fahrzeugen fest.
Es enthält alternative Verfahren zur Berechnung oder Prüfung der Sicherheitslüftung.
Véhicules habitables de loisirs - Exigences de ventilation de sécurité
Le présent document spécifie les exigences minimales de ventilation de sécurité applicables aux véhicules habitables de loisirs.
Il fournit différentes méthodes de calcul ou d’essai de la ventilation de sécurité.
Bivalna počitniška vozila - Zahteve za varnostno prezračevanje
Ta dokument določa minimalne zahteve za varnostno prezračevanje bivalnih počitniških vozil. Predstavlja alternativne metode za izračun ali preskus varnostnega prezračevanja.
General Information
- Status
- Published
- Public Enquiry End Date
- 27-Feb-2019
- Publication Date
- 20-Nov-2019
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 20-Nov-2019
- Due Date
- 25-Jan-2020
- Completion Date
- 21-Nov-2019
Relations
- Effective Date
- 01-Jan-2020
- Effective Date
- 27-Dec-2017
Overview
EN 721:2019 - Leisure accommodation vehicles - Safety ventilation requirements (CEN) specifies the minimum safety ventilation requirements for leisure accommodation vehicles such as caravans, motorcaravans and caravan holiday homes. The standard defines how to calculate or verify safety ventilation by testing, sets siting rules for flue terminals and ventilators, and requires user information and warning labelling where applicable. It was prepared by CEN/TC 245 and supersedes the 2004 edition.
Key Topics
- Scope and objective: Ensure air renewal for occupants, supply combustion air for non‑room‑sealed appliances, and evacuation of combustion products for flueless appliances.
- Minimum free area: Clause 5 provides numerical minimums for high‑level and low‑level safety ventilation (tables include typical values such as 7 500, 10 000, 12 500, 15 000 and 20 000 for high-level and 1 000–5 000 for low‑level, by floor area bands).
- Vent location & dimensions:
- High vents: minimum heights (not less than 1 750 mm above floor when not roof vents) and specific siting rules.
- Low vents: close to floor (not more than 100 mm above interior floor level).
- Roof vs wall vents: roof vents may require smaller free area; wall vents often require double the roof‑vent area.
- Flue terminal siting: Minimum clearances from refuelling points (500 mm) and from living-space ventilators or opening windows (300 mm); underfloor flues and channeling constraints are addressed.
- Safety ventilator grilles and obstruction avoidance: Grilles must be accessible for cleaning; ventilation paths must not be easily blocked by storage, curtains or fittings.
- Alternative ventilation for large caravan holiday homes: Trickle ventilators and two calculation methods (per‑compartment or average) are allowed for floor areas over 20 m².
- Testing and verification (Clause 6):
- Test conditions: still atmosphere, ambient 20 ± 5 °C, background CO measured at 1 000 mm.
- CO test: calibrated instruments, CO‑producing LPG test burners (specified fuel quality), burner output calculated per Clause 6.2; acceptance criterion - CO concentration in each habitable compartment must not rise by more than 1% (10 000 ppm) above background.
- Test report and permanent cooker‑adjacent label required when verified by test.
- User information: Requirements for a user's handbook and warning notice (Annex A).
Applications
- Manufacturers and designers of caravans, motorcaravans and caravan holiday homes use EN 721:2019 to size ventilation, position flues and design grille/access.
- Test laboratories and certifiers apply the CO test procedure and reporting requirements to demonstrate compliance.
- Installers, safety engineers and conformity assessors refer to the standard for safe appliance installation and for producing occupant information and warning labels.
- National standards bodies and product regulators use it to harmonize safety ventilation expectations across CEN member states.
Related Standards
- Normative reference: EN 13878 - Leisure accommodation vehicles: Terms and definitions.
- EN 721:2019 replaces EN 721:2004 and should be used in conjunction with appliance manufacturers’ instructions and national regulations where applicable.
Keywords: EN 721:2019, safety ventilation, leisure accommodation vehicles, caravans, motorcaravans, caravan holiday homes, ventilation requirements, flueless appliances, CO testing, trickle ventilators, CEN.
Frequently Asked Questions
SIST EN 721:2020 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Leisure accommodation vehicles - Safety ventilation requirements". This standard covers: This document specifies the minimum safety ventilation requirements for leisure accommodation vehicles. It provides alternative methods of calculation or testing of safety ventilation.
This document specifies the minimum safety ventilation requirements for leisure accommodation vehicles. It provides alternative methods of calculation or testing of safety ventilation.
SIST EN 721:2020 is classified under the following ICS (International Classification for Standards) categories: 43.100 - Passenger cars. Caravans and light trailers. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 721:2020 has the following relationships with other standards: It is inter standard links to SIST EN 721:2005, SIST EN 721:2005. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 721:2020 is associated with the following European legislation: EU Directives/Regulations: 2022-01-0296. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN 721:2020 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2020
Nadomešča:
SIST EN 721:2005
Bivalna počitniška vozila - Zahteve za varnostno prezračevanje
Leisure accommodation vehicles - Safety ventilation requirements
Bewohnbare Freizeitfahrzeuge - Anforderungen an die Sicherheitslüftung
Véhicules habitables de loisirs - Exigences de ventilation de sécurité
Ta slovenski standard je istoveten z: EN 721:2019
ICS:
43.100 Osebni avtomobili. Bivalne Passenger cars. Caravans
prikolice in lahke prikolice and light trailers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 721
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 43.100 Supersedes EN 721:2004
English Version
Leisure accommodation vehicles - Safety ventilation
requirements
Véhicules habitables de loisirs - Exigences de Bewohnbare Freizeitfahrzeuge - Anforderungen an die
ventilation de sécurité Sicherheitslüftung
This European Standard was approved by CEN on 9 September 2019.
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. 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 European Standard 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, Turkey 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 721:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 5
4.1 General . 5
4.2 Ingress of products of combustion. 5
4.3 Avoidance of obstructions . 7
4.4 Safety ventilator grilles . 7
5 Minimum free area of safety ventilation, by calculation . 7
5.1 General . 7
5.2 Sizes of safety ventilation openings in habitable compartments . 7
5.3 Alternative ventilation arrangements for caravan holiday homes over 20 m floor
area . 8
6 Testing . 10
6.1 Preparation . 10
6.2 Procedure. 10
6.3 Test report . 11
7 User's handbook . 12
Annex A (normative) Warning notice . 13
European foreword
This document (EN 721:2019) has been prepared by Technical Committee CEN/TC 245 “Leisure
accommodation vehicles”, the secretariat of which is held by AFNOR.
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 April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
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 supersedes EN 721:2004.
In relation to EN 721:2004, the main technical changes are:
a) “ventilation” specified to “safety ventilation” throughout the document;
b) specified to flueless appliances;
c) normative references updated;
d) in 6.2 “Procedure”, procedure and calculation modified;
e) in 6.3 “Test report”, elements of the test report specified;
f) editorially modified;
g) Alternative ventilation arrangements have been added
h) Revision of chapter 5.2.1 “Habitable compartments containing non-room-sealed appliances” (the
table has been divided into two different tables)
i) deleted volume calculation for CO testing
j) 6.2.4 modified.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Turkey and the
United Kingdom.
1 Scope
This document specifies the minimum safety ventilation requirements for leisure accommodation
vehicles.
It provides alternative methods of calculation or testing of safety ventilation.
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.
EN 13878, Leisure accommodation vehicles — Terms and definitions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13878 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
habitable compartment
compartment used for living purposes which is not solely utility room, sanitation compartment, walk in
storage or hallway
3.2
utility room
room limited in function to a washing machine and/ or tumble dryer
4 Requirements
4.1 General
Each habitable compartment, shall be provided with safety ventilation. Where trickle ventilation is used
in caravan holiday homes, the sanitary compartments shall be included. A habitable compartment that
includes a part that can be temporarily separated by a curtain shall be considered as a single
compartment.
The safety ventilation shall permit at least:
a) renewal of air for occupants;
b) supply of combustion air for appliances that are non-room-sealed;
c) evacuation of the products of combustion for flueless appliances, and
d) the necessary ventilation as prescribed by installed appliances manufacturer's instructions.
This requirement shall be considered fulfilled if, for each model:
e) the minimum free area of safety ventilation is provided, in accordance with Clause 5, or
f) the CO concentration in the air within each habitable compartment of the leisure accommodation
vehicle does not rise by more than 1 % (10 000 ppm) absolute above the background level, when
tested in accordance with Clause 6 and independently verified, and a permanent label is affixed
adjacent to the cooker (see Annex A).
If, when the vehicle is in motion, the free area of safety ventilation is reduced, then as the vehicle
becomes stationary the ventilators shall automatically return to the position in which the free area of
safety ventilation was calculated in accordance with Clause 5 or tested in accordance with Clause 6.
4.2 Ingress of products of combustion
Flue terminals shall be sited in accordance with the appliance manufacturer's instructions preferably on
the roof or in the wall of the vehicle.
Where national legislation does not forbid that the flue of an appliance is designed to discharge through
the floor, precautions shall be taken to prevent ingress of the products of combustion into the
habitation area through safety ventilation openings in the floor. The terminal shall be positioned as
close as possible to the sides or rear of the vehicle.
If there are underfloor flue terminals, it is recommended that low level safety ventilation openings are
positioned in the side of the vehicle and not in the floor.
Where the underfloor area is divided into distinct channels that project below the floor, e.g. by chassis
members or floor bearers, there shall be no safety ventilation openings in the same channel as any flue
outlet.
Flue terminals shall not be positioned within 500 mm of a refuelling point or fuel tank breather outlet
or any ventilator from the fuel system(s).
Flue terminals positioned on a wall or a roof (except for gas appliances of not more than 30 g/h LPG
consumption) shall not be fitted within 300 mm of a ventilator
...
Die SIST EN 721:2020 ist ein wichtiges Dokument, das die Sicherheitsanforderungen für die Belüftung von Freizeitunterkünften regelt. Der Umfang dieser Norm umfasst die Festlegung der Mindestanforderungen an die Sicherheitsbelüftung in Freizeitunterkünften, was insbesondere für den Schutz der Gesundheit und Sicherheit der Benutzer von großer Bedeutung ist. Ein wesentlicher Stärke der Norm liegt in den detaillierten Vorgaben, die eine konsistente und sichere Anwendung im gesamten Bereich der Freizeitunterkünfte ermöglichen. Durch die Bereitstellung alternativer Methoden zur Berechnung oder Prüfung der Sicherheitsbelüftung unterstützt die SIST EN 721:2020 die Akteure dabei, flexibel und effizient auf unterschiedliche Gegebenheiten zu reagieren. Diese Flexibilität ist entscheidend, da die jeweiligen Anforderungen an die Belüftung je nach Fahrzeugtyp und Nutzung stark variieren können. Die Relevanz dieser Norm ist unbestritten, da sie ein zentrales Element der Sicherheit in Freizeitunterkünften darstellt. Die Einhaltung der festgelegten Belüftungsanforderungen trägt entscheidend dazu bei, gesundheitlichen Risiken durch unzureichende Luftzirkulation und Schadstoffansammlungen vorzubeugen. Die Norm fördert somit nicht nur die Sicherheit, sondern auch den Komfort der Benutzer, was in einem zunehmend wettbewerbsorientierten Markt für Freizeitunterkünfte von essenzieller Bedeutung ist. Zusammenfassend lässt sich sagen, dass die SIST EN 721:2020 ein unverzichtbares Instrument zur Gewährleistung der Sicherheitsbelüftung in Freizeitunterkünften darstellt, dessen klare Richtlinien und flexible Ansätze den Nutzern helfen, hochwertige und sichere Freizeitfahrzeuge anzubieten.
SIST EN 721:2020は、レジャー宿泊車両における安全換気要件を定める重要な標準です。このドキュメントは、レジャー宿泊車両の使用者にとって必要不可欠な安全換気の基準を設け、最低限の安全換気要件を明示しています。特に、レジャー宿泊車両の設計や製造に携わる企業にとって、この標準はその製品の安全性を確保するための指針となります。 この標準の強みは、具体的な計算方法やテスト方法を代替的に提供している点にあります。これにより、利用者は複数の手段を通じて換気要件を満たす方法を選択でき、設計に柔軟性を持たせることができます。このアプローチは、従来の規格よりも実践的であり、さまざまな状況や要件に対応しやすいものとしています。 さらに、SIST EN 721:2020は、レジャー宿泊車両の安全性に対する意識の高まりに応じて、その適用範囲が広がっている点でも注目されます。特に、異なるタイプのレジャー宿泊車両に適用可能であり、市場のニーズに応える標準となっています。このように、レジャー宿泊車両の安全換気要件を規定することで、利用者の健康と安全を守る役割を果たしていることが、当標準の重要性を示しています。
SIST EN 721:2020 표준은 레저 숙소 차량의 안전 환기 요구 사항에 대한 최소 기준을 규정하고 있습니다. 이 문서는 레저 숙소 차량에서 안전한 환기를 보장하기 위해 필요한 기본 요건을 상세히 제시하며, 다양한 접근 방식을 통해 안전 환기의 계산 또는 테스트를 위한 대체 방법을 제공합니다. 이 표준의 강점은 안전 환기와 관련된 다양한 시나리오를 포괄적으로 다루고 있다는 점입니다. 이는 제조업체와 사용자가 직면할 수 있는 여러 가지 상황을 고려하여 개발된 것으로, 실제로 적용 가능한 기술적 지침을 제공합니다. 이러한 포괄성은 레저 숙소 차량의 사용자가 안전을 보장할 수 있도록 돕는 중요한 요소입니다. 또한, SIST EN 721:2020은 안전 환기의 중요성을 강조하며, 사용자와 설계자가 필요로 하는 실질적인 데이터를 제공합니다. 이 표준은 레저 숙소 차량 제조사들이 보다 효과적으로 안전 환기 시스템을 설계하도록 유도하며, 소비자 보호와 안전을 염두에 둔 설계 및 제작 과정을 촉진합니다. 결론적으로, SIST EN 721:2020은 레저 숙소 차량의 안전 환기 요구 사항을 충족시키기 위한 필수적인 기준으로, 이를 통해 레저 활동 중의 안전성을 강화하는 데 중요한 역할을 할 것입니다.
The SIST EN 721:2020 standard is a pivotal document that delineates the minimum safety ventilation requirements for leisure accommodation vehicles. The precise scope of this standard ensures that these vehicles maintain adequate air quality and safety for occupants, addressing a critical aspect of health and comfort in recreational settings. One of the primary strengths of the SIST EN 721:2020 is its comprehensive approach to safety ventilation. It not only sets clear safety benchmarks but also offers alternative methods for calculation or testing of safety ventilation, catering to varied design and engineering needs. This flexibility allows manufacturers to adopt the most suitable methods for their specific vehicle designs, promoting innovation while ensuring compliance with essential safety standards. Moreover, the relevance of this standard cannot be overstated, especially in an era where outdoor activities and leisure travel have gained unprecedented popularity. As safety becomes a paramount concern for both manufacturers and consumers, the SIST EN 721:2020 stands out as a crucial guideline that helps prevent ventilation-related hazards in leisure accommodation vehicles. It directly impacts user experience and safety, fostering greater confidence among consumers who seek reliable and safe leisure options. In summary, the SIST EN 721:2020 standard for safety ventilation requirements in leisure accommodation vehicles provides essential guidelines that enhance the safety and usability of such vehicles, while its alternative calculation methods promote adaptability and innovation within the industry. The emphasis on safety ventilation highlights its significance in maintaining healthy living conditions in leisure settings.
La norme SIST EN 721:2020 définit les exigences minimales en matière de ventilation de sécurité pour les véhicules de loisirs. Son champ d'application est crucial pour garantir la sécurité des occupants dans ces espaces de vie mobiles. En précisant les exigences de ventilation nécessaires, la norme contribue à prévenir les risques liés à une mauvaise qualité de l'air, tels que l'accumulation de gaz nocifs ou une humidité excessive. Parmi ses forces, la norme propose plusieurs méthodes alternatives pour le calcul ou le test de la ventilation de sécurité. Cela permet aux fabricants et aux concepteurs de choisir la méthode la plus adaptée à leurs véhicules de loisirs, tout en respectant les exigences minimales. La flexibilité des méthodes soutient l'innovation et permet des adaptations aux particularités de chaque modèle de véhicule, renforçant ainsi la sécurité globale. La pertinence de la norme SIST EN 721:2020 est accentuée par l'importance croissante accordée aux conditions de vie saines à l'intérieur des véhicules. À mesure que les véhicules de loisirs gagnent en popularité, des exigences rigoureuses en matière de ventilation de sécurité deviennent essentielles pour protéger les utilisateurs. En établissant des normes pour la ventilation, cette norme contribue à la durabilité et à l'amélioration constante de la qualité de vie à l'intérieur de ces espaces. En résumant, la norme SIST EN 721:2020 est une référence incontournable pour le secteur des véhicules de loisirs, apportant des solutions pratiques et sécuritaires pour la ventilation, et jouant un rôle clé dans l'amélioration des conditions de vie des utilisateurs.
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