1、BRITISH STANDARD BS EN 721:2004 Leisure accommodation vehicles Safety ventilation requirements The European Standard EN 721:2004 has the status of a British Standard ICS 43.040.60; 43.100 BS EN 721:2004 This British Standard was published under the authority of the Standards Policy and Strategy Comm
2、ittee on 17 January 2005 BSI 17 January 2005 ISBN 0 580 45269 7 National foreword This British Standard is the official English language version of EN 721:2004. It supersedes BS EN 721:1999 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee B/511, Buildi
3、ngs, mobile and temporary, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in th
4、e BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible
5、for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK i
6、nterests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this
7、 document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN721 September2004 ICS43.040.60;43.100 SupersedesEN721:1998 Englishversion LeisureaccommodationvehiclesSafetyventilation requirements Vhicu
8、leshabitablesdeloisirsExigencesdeventilation descurit BewohnbareFreizeitfahrzeugeAnforderungenandie Sicherheitslftung ThisEuropeanStandardwasapprovedbyCENon9July2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofa
9、nationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation unde
10、rtheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxem
11、bourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymean
12、sreserved worldwideforCENnationalMembers. Ref.No.EN721:2004:EEN 721:2004 (E) 2 Contents page 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 Ventilator grilles 7
13、5 Minimum free area of safety ventilation, by calculation . 7 5.1 General. 7 5.2 Sizes of ventilation openings in habitation compartments 7 5.2.1 Habitation compartments containing non-room-sealed appliances . 7 5.2.2 Habitation compartments greater than 10 m 2floor area. 8 5.2.3 Other habitation co
14、mpartments 8 6 Testing 8 6.1 Preparation 8 6.2 Procedure 8 6.3 Test report . 9 7 Users handbook . 9 Annex A (normative) Warning notice 10 EN 721:2004 (E) 3 Foreword This document (EN 721:2004) has been prepared by Technical Committee CEN/TC 245 “Leisure accommodation vehicles”, the secretariat of wh
15、ich is held by BSI. 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 March 2005, and conflicting national standards shall be withdrawn at the latest by March 2005. This European Standard supersedes
16、 EN 721:1998 “Leisure accommodation vehicles Safety ventilation requirements”. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia,
17、 Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 721:2004 (E) 4 1 Scope This document specifies the minimum safety ventilation requir
18、ements for leisure accommodation vehicles. It provides alternative methods of calculation or testing of safety ventilation. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For unda
19、ted references, the latest edition of the referenced document (including any amendments) applies. EN 624:2000, Specification for dedicated LPG appliances Room-sealed LPG space heating equipment for installation in vehicles and boats EN 13878:2003, Leisure accommodation vehicles Terms and definitions
20、 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13878:2003 and the following apply. 3.1 overall plan area the overall plan area is measured as follows: a) Caravan. Overall width multiplied by overall length excluding towbar; b) Motor caravan. Overall
21、 width, excluding driving mirrors, multiplied by overall length. Where the accommodation section is demountable, the overall plan area is the overall length of the demountable section multiplied by the overall width; c) Caravan holiday home. Overall width multiplied by overall length excluding towba
22、r. When a caravan holiday home comprises more than one element, the overall plan area is the sum of the areas of the separate elements before they are joined together. 3.2 model a leisure accommodation vehicle is considered to be a different model from the tested model if any of the following apply:
23、 a) the exterior size and/or shape of the body is altered or in the case of a motor caravan a different base vehicle is used; b) the cooking appliances are situated more than 300 mm from, and/or have more burners than, the tested model and/or any other non room sealed appliance is of a different typ
24、e or position; c) any permanent ventilation opening in the external shell of the vehicle is of a different type or situated more than 300 mm from its position in the tested model and/or there is consequent obstruction of any ventilation opening; d) the internal volume of the leisure accommodation ve
25、hicle, excluding furniture, differs by more than 10 %. EN 721:2004 (E) 5 4 Requirements 4.1 General Each habitable compartment, excluding toilets and bathrooms, shall be provided with safety ventilation. A habitable compartment that includes a part that can be temporarily separated by a curtain shal
26、l be considered as a single compartment. The ventilation shall permit: a) renewal of air for occupants; b) supply of combustion air for appliances that are not room-sealed; and c) evacuation of the products of combustion for appliances that are not room-sealed. This requirement shall be considered f
27、ulfilled if, for each model (see 3.2): 1) the minimum free area of safety ventilation is provided, in accordance with clause 5; or 2) the CO 2content of the air within the habitable compartments of the leisure accommodation vehicle does not rise by more than 1 % absolute above the background level,
28、when tested in accordance with clause 6 by an independent test house, and a permanent label is affixed adjacent to the cooker (see annex A). If when the vehicle is in motion the free area of ventilation is reduced, then as the vehicle becomes stationary the ventilators shall automatically return to
29、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 manufacturers instructions preferably on the roof or in the
30、 wall of the vehicle. Where national legislation (see annex A of EN 624:2000) 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 ventilation openings in
31、 the floor. The terminal shall be positioned as close as possible to the sides or rear of the vehicle. NOTE If there are underfloor flue terminals it is recommended that low level ventilation openings are positioned in the side of the vehicle and not in the floor. Where the underfloor area is divide
32、d into distinct channels that project below the floor, e.g. by chassis members or floor bearers, there shall be no 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 fr
33、om 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 for the living space or an opening part of a window. EN 721:2004 (E) 6 Key 1 Ventilator 2 Prohibited zone l = 300
34、 mm Figure 1 Prohibited zone for discharge openings for the products of combustion in relation to ventilators Where the flue terminal of an appliance (except for gas appliances of not more than 30 g/h LPG consumption) is positioned vertically below an opening part of a window, the appliance shall be
35、 fitted with an automatic shut-off device to prevent operation when the window is open. Key 1 Window 2 Prohibited zone 3 Floor l = 300 mm Figure 2 Prohibited zone for discharge openings for the products of combustion in relation to windows EN 721:2004 (E) 7 4.3 Avoidance of obstructions Ventilation
36、openings shall be positioned so that they cannot be made ineffective by drapes, curtains or other obstructions. If the ventilation is provided to the interior through a cupboard, bed box or similar space, it shall not be possible for the passage of air to be obstructed inadvertently e.g. by items st
37、ored in these spaces. 4.4 Ventilator grilles The ventilation openings shall be protected by a grille that shall be accessible for cleaning. Access may be gained by the use of a simple tool, e.g. a screwdriver. 5 Minimum free area of safety ventilation, by calculation 5.1 General All grilles (see 4.4
38、) shall be accounted for when providing the minimum free area of safety ventilation. When the high level ventilation is not provided by roof vents, the minimum high level ventilation area shall be twice the values shown for roof vents in Table 1. The high level ventilation openings, which are not ro
39、of vents, shall be not less than 1 800 mm from the interior floor level of the leisure accommodation vehicle, and in no case less than 300 mm above the upper surface of the uncompressed mattress of the highest sleeping berth. A combination of roof and wall vents are acceptable. To calculate the leve
40、l of ventilation required, subtract the level of ventilation given by the roof vent from the total required. Multiply the remainder by two to give the level of ventilation required of the wall vents. Low level ventilation openings shall be not more than 100 mm above the interior floor level. 5.2 Siz
41、es of ventilation openings in habitation compartments 5.2.1 Habitation compartments containing non-room-sealed appliances Ventilation openings shall conform to Table 1. Table 1 Minimum sizes of ventilation openings in habitation compartments containing non-room-sealed appliances Overall plan area of
42、 leisure accommodation vehicles m 2Minimum high level ventilation (Roof vents) mm 2Minimum low level ventilation mm 2up to 5 7 500 1 000 over 5 and up to 10 10 000 1 500 over 10 and up to 15 12 500 2 000 over 15 and up to 20 15 000 3 000 over 20 20 000 5 000 EN 721:2004 (E) 8 5.2.2 Habitation compar
43、tments greater than 10 m 2floor area Habitation compartments greater than 10 m 2floor area, measured from wall to wall, not containing non-room-sealed appliances shall have a minimum of 7 500 mm 2of safety ventilation at high level, or 15 000 mm 2if not by a roof vent as well as 1 000 mm 2at low lev
44、el. 5.2.3 Other habitation compartments All habitation compartments not having a non-room-sealed appliance installed, excluding toilets and bathrooms, shall have a minimum of 1 500 mm 2of safety ventilation installed at high level, or 3 000 mm 2if not by a roof vent, as well as 500 mm 2at low level.
45、 6 Testing 6.1 Preparation 6.1.1 Carry out the test in a calm atmosphere with an ambient external temperature of (20 5) C. 6.1.2 Measure the background level of CO 2in the test area at a distance of 1 000 mm from the test vehicle. 6.1.3 Shut all windows, doors and manually closable ventilators and k
46、eep closed during the test period. Open separating curtains. Place berths in the sleeping position. Close adjustable ventilators to their minimum position. Hermetically seal the passage of all instrumentation services. Switch off all mechanical ventilation systems. 6.2 Procedure 6.2.1 Measure the CO
47、 2level in the leisure accommodation vehicle compartments with a calibrated apparatus. Test all compartments concurrently. 6.2.2 If a LPG refrigerator is fitted, operate the refrigerator on LPG at its maximum setting together with any other non-room-sealed appliances, except grills, cookers or ovens
48、. 6.2.3 To simulate occupation of the compartments, and to introduce a safety factor to cover possible extra occupants and extended use of an unattended cooking appliance, introduce a CO 2producing burner fuelled by propane. The output W pof the burner shall be adjusted using the following formula: () () N P W + = 1 , 0 1 , 0 2 , 1 P(1) where: W pis the output of the burner, in kilowatts P is the number of standard berths and additional berths provided by the manufacturer in the room to be tested. N is the total number of burners of all grills, c
