EN 721:2019
(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
Relations
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.
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
...
Frequently Asked Questions
EN 721:2019 is a standard published by the European Committee for Standardization (CEN). 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.
EN 721:2019 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.
EN 721:2019 has the following relationships with other standards: It is inter standard links to EN 721:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 721:2019 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 CEN standards.
La norme SIST EN 721:2020, intitulée "Leisure accommodation vehicles - Safety ventilation requirements", établit des exigences minimales en matière de ventilation de sécurité pour les véhicules d'hébergement de loisirs. Son objectif principal est de garantir la sécurité des utilisateurs en assurant une ventilation adéquate, ce qui est crucial pour prévenir les risques liés à la qualité de l'air à l'intérieur des véhicules. L'une des forces majeures de cette norme est sa versatilité, car elle propose des méthodes alternatives de calcul ou de test de la ventilation de sécurité. Cela permet aux fabricants et aux concepteurs de choisir l'approche qui s'adapte le mieux à leurs produits spécifiques tout en respectant les exigences de sécurité. Cette flexibilité est particulièrement pertinente dans le secteur des véhicules d'hébergement de loisirs, où les configurations et les capacités peuvent varier considérablement. La norme aborde également des aspects essentiels de la sécurité, en s'assurant que les véhicules offrent un environnement de vie sain. En intégrant des critères de ventilation qui prennent en compte différents scénarios d'utilisation, cette norme se révèle pertinente pour promouvoir non seulement le bien-être des occupants, mais aussi pour répondre aux obligations réglementaires existantes concernant la sécurité des habitations temporaires. En résumé, la norme SIST EN 721:2020 est un document essentiel qui établit des exigences robustes et pertinentes pour la ventilation de sécurité dans les véhicules d'hébergement de loisirs. Sa capacité à offrir des solutions alternatives de calcul et de test en fait une ressource précieuse pour l'industrie, visant à améliorer à la fois la sécurité et le confort des utilisateurs.
Die Norm SIST EN 721:2020 behandelt die Sicherheitsbelüftungsanforderungen für Freizeitunterkünfte, die in der Kategorie der Freizeitunterkunftsfahrzeuge eingeordnet sind. Die Norm legt die Mindestanforderungen für die Sicherheit und Belüftung fest, um die Gesundheit und das Wohlbefinden der Nutzer dieser Fahrzeuge zu gewährleisten. Ein wesentlicher Stärke der Norm liegt in ihrer klaren Definition der Sicherheitsbelüftung, die dafür sorgt, dass die Luftqualität in Freizeitunterkünften jederzeit auf einem sicheren Niveau bleibt. Die Norm bietet zudem alternative Berechnungsmethoden oder Prüfverfahren für die Sicherheitsbelüftung an, was den Anwendern Flexibilität und die Möglichkeit zur Anpassung an spezifische Bedürfnisse und Bedingungen bietet. Die Relevanz der EN 721:2019 zeigt sich nicht nur in der Einhaltung der gesetzlichen Vorschriften, sondern auch in der Förderung eines sicheren und gesunden Umfelds für die Nutzer von Freizeitunterkunftsfahrzeugen. Diese Norm trägt zur Verbesserung der allgemeinen Sicherheitsstandards in der Branche bei und ist somit ein wichtiges Dokument für Hersteller, Prüfinstitutionen und Betreiber von Freizeitunterkünften.
SIST EN 721:2020は、レジャー宿泊車両向けの安全換気要件に関する標準を定めた文書であり、特にレジャー宿泊車両の安全性を確保するための最低限の換気条件を詳細に記述しています。この標準は、レジャー宿泊車両の利用者が安全かつ快適に過ごせる環境を提供することを目的としており、換気不足による健康リスクを軽減するために重要です。 この標準の強みは、代替的な計算方法や試験方法を提供している点です。これにより、異なる設計や利用条件を持つ多様なレジャー宿泊車両に対しても安全換気を確保する柔軟性を持たせています。ユーザーや製造者は、自身の施設や地域の条件に応じた方法を選択することができるため、実用性が高いと言えます。 さらに、SIST EN 721:2020は、業界全体におけるベストプラクティスとしての役割を果たし、レジャー宿泊車両の設計者や製造者が遵守すべき基準を提供します。これにより、製品の安全性の向上だけでなく、消費者の信頼を得ることにも繋がります。この文書は、レジャー宿泊車両に関わるすべての関係者にとって不可欠な指針となっています。 総じて、この標準は、レジャー宿泊車両の安全換気要件に関連する基本的かつ包括的な指針を提供しており、その適用範囲の広さと具体的な実施手段により、業界の発展に寄与するものです。
SIST EN 721:2020 문서는 레저 숙소 차량에 대한 안전 환기 요구사항의 최소 기준을 명시하고 있습니다. 이 표준은 레저 숙소 차량의 안전성을 보장하기 위해 반드시 지켜야 할 환기 시스템의 세부 사항을 제공합니다. 문서의 주요 내용은 안전 환기 요구사항에 대한 다양한 계산 및 테스트 방법의 대안을 포함하고 있어, 사용자에게 유연성을 제공합니다. 이 표준의 강점은 레저 숙소 차량의 운영과 관련된 안전 문제를 효과적으로 해결할 수 있도록 돕는다는 점입니다. 최소 환기 기준을 설정함으로써 이용자가 안전한 환경에서 레저 차량을 사용할 수 있도록 하는 것이 주요 목적입니다. 또한, 계산 및 테스트 방법의 대안 제공은 다양한 설계 및 환경 조건을 고려할 수 있게 해 주어, 각기 다른 요구사항에 부합하는 적용을 가능하게 합니다. 따라서 EN 721:2019 표준은 레저 숙소 차량의 안전한 환기 시스템 설계를 위한 필수적인 가이드라인으로, 관련 산업에 있어 높은 수준의 안전성과 신뢰성을 보장하는 데 중요한 역할을 합니다. 이 표준의 적용은 제조사와 사용자 모두에게 실질적인 혜택을 제공하며, 안전한 레저 환경을 조성하는 데 기여할 것입니다.
The standard EN 721:2019, titled "Leisure accommodation vehicles - Safety ventilation requirements," offers a comprehensive framework for ensuring safety through adequate ventilation in leisure accommodation vehicles. This document lays down the minimum safety ventilation requirements, crucial for enhancing air quality and safeguarding the health of occupants in these vehicles. One of the strengths of EN 721:2019 is its detailed specification of ventilation needs, which addresses various potential hazards associated with poor air circulation. The standard provides alternative methods for calculating or testing safety ventilation, allowing manufacturers and operators flexibility in how they meet the required safety ventilation levels. This flexibility is particularly relevant given the diverse range of leisure accommodation vehicles on the market, ensuring that the standard can be applied to a wide array of designs and configurations. Moreover, the document emphasizes an evidence-based approach, encouraging manufacturers to adopt best practices in ventilation. The focus on safety ventilation requirements not only enhances occupant well-being but also aligns with broader regulatory frameworks aimed at promoting health and safety standards in recreational environments. In the context of increasing consumer awareness regarding indoor air quality and safety, the relevance of EN 721:2019 cannot be overstated. Adherence to these safety ventilation requirements is essential for manufacturers aiming to meet customer expectations while maintaining compliance with health and safety regulations. Overall, EN 721:2019 stands out as a pivotal standard in the leisure accommodation vehicle sector, ensuring that safety ventilation remains a priority in the design and operation of these vehicles.
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