1、BSI Standards PublicationBS ISO 14857:2014Thermal performance inthe built environment Determination of airpermeance of buildingmaterialsBS ISO 14857:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 14857:2014.The UK participation in its preparation was entr
2、usted to TechnicalCommittee B/540/8, Mirror committee for ISO/TC 163 - ThermalPerformance and Energy use in the built Environment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions
3、of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 74116 6ICS 91.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under
4、the authority of theStandards Policy and Strategy Committee on 31 March 2014.Amendments issued since publicationDate Text affectedBS ISO 14857:2014 ISO 2014Thermal performance in the built environment Determination of air permeance of building materialsPerformance thermique en environnement bti Dter
5、mination de la permance lair des matriaux de constructionINTERNATIONAL STANDARDISO14857First edition2014-02-15Reference numberISO 14857:2014(E)BS ISO 14857:2014ISO 14857:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no par
6、t of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member bo
7、dy in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 14857:2014ISO 14857:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1
8、Scope . 12 Normative references 13 Terms and definitions . 14 Sampling and conformity control . 15 Test specimens 15.1 Number 15.2 Dimensions . 15.3 Preparation 25.4 Conditioning 26 Principle 27 Apparatus . 28 Procedures 38.1 Specimen installation 38.2 Test procedure . 49 Calculation and expression
9、of results . 69.1 Standard temperature and pressure 610 Precision . 611 Test report . 7Annex A (normative) Procedure for estimating errors in derived quantities .13BS ISO 14857:2014ISO 14857:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national
10、 standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Internationa
11、l organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended fo
12、r its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.or
13、g/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be
14、 in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions
15、 related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 163, Thermal performance and energy use in th
16、e built environment, Subcommittee SC 1, Test and measurement methods.iv ISO 2014 All rights reservedBS ISO 14857:2014ISO 14857:2014(E)IntroductionThis International Standard contains the requirements for testing various building materials to determine their suitability to be used as an air barrier m
17、aterial. ISO 2014 All rights reserved vBS ISO 14857:2014BS ISO 14857:2014Thermal performance in the built environment Determination of air permeance of building materials1 ScopeThis International Standard specifies the equipment and procedures to determine the air permeance of building materials at
18、various pressure differentials and then assigning an air permeance rate at a reference pressure differential rate (P) of 75 Pa.This method is intended for testing materials independent of a substrate using a 1 m 1 m specimen size. The results of this test method can be used to determine whether a ma
19、terial qualifies to function as an air barrier material.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest
20、edition of the referenced document (including any amendments) applies.ISO 7345, Thermal insulation Physical quantities and definitionsISO 9229, Thermal insulation VocabularyISO 12576-1, Thermal insulation Insulating materials and products for buildings Conformity control systems Part 1: Factory-made
21、 products3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 7345 and ISO 9229 and the following apply.3.1air permeancerate of air flow (L/s), per unit area (m2) and per unit static pressure differential (Pa)4 Sampling and conformity controlThe procedures
22、 described in ISO 12576-1 shall be applied for the purposes of sampling and conformity control.5 Test specimens5.1 NumberThe number of test specimens shall be five.5.2 DimensionsThe test specimens shall be 1,2 m 1,2 m. Where the manufactured product is less than 1,2 wide, the length shall be increas
23、ed to provide the same area.INTERNATIONAL STANDARD ISO 14857:2014(E) ISO 2014 All rights reserved 1BS ISO 14857:2014ISO 14857:2014(E)5.3 PreparationFrom the sample obtained in accordance with Clause 4, cut the material to 1,2 m 1,2 m. For fluid-applied products, the material shall be installed on a
24、release material or a substrate and then the materials shall be removed from the release material or substrate after curing.5.4 ConditioningThe test specimens shall be conditioned for seven days at(23 2) C and (50 10) % relative humidityor(23 5) C and501020+()% relative humidityor(27 5) C and 651020
25、+()% relative humidityunless other conditions are given in the relevant material standard.6 PrincipleA test specimen is subjected to various air pressure differentials and the air permeance is measured.7 ApparatusThe schematic of the apparatus is shown in Figure 1.7.1 Test chamber, shall be construc
26、ted with a 1 m 1 m test opening in the top and which will accept a 1,2 m 1,2 m specimen.In some cases, the size could be modified for materials which are manufactured with a width less than 1,2 m. In all cases, the test opening shall be 1 m2. The depth of the test chamber shall be 400 mm. A compress
27、ion frame 0,1 m wide shall be installed around the outside of the test chamber at the top of the test chamber. The compression frame shall be stiff and fastened solidly to the test chamber to limit defection. Observation panels shall be installed on two sides of the test frame to allow observation o
28、f the material installed in the test chamber.The test chamber shall be sealed with two parallel strips of medium-density gasket material at all sealing points of the test chamber so that the extraneous air leakage shall not be measurable at 700 Pa.A second compression frame the same size and shape o
29、f the compression frame on the test chamber shall be constructed and the corners sealed.7.2 Air flow measuring devices, shall be used which can measure of 1 107m3/s (0,000 1 L/s) up to 1 102m3/s (1,0 L/s) with an accuracy of 3 %.7.3 Static pressure differential measuring devices, shall be used which
30、 can measure up to 500 Pa with an accuracy of 0,5 %.7.4 Laboratory barometric pressure measuring device, shall be used which can measure pressure with 3 % of the reading.2 ISO 2014 All rights reservedBS ISO 14857:2014ISO 14857:2014(E)7.5 Piping, shall be used to connect the test chamber to the varia
31、ble pressure differential equipment.The piping shall be airtight. The pipe connection to the test chamber shall contain an air filter so that the air flow measuring device shall not be affected by dust or suspended particulates. The piping shall be designed so that the flow regime upstream and downs
32、tream of the air flow measuring device shall not affect the devices accuracy. The piping shall contain a flow control device to regulate the static pressure across the test specimen within 0,5 % of the pressure reading. The piping shall contain a temperature measuring device with an accuracy of 0,5
33、C, to measure the temperature of the air flowing in the piping.7.6 Variable pressure differential equipment, shall be an equipment with a variable control to produce a static pressure across the test specimen within 0,5 % of the pressure reading.The equipment shall be able to produce both positive a
34、nd negative pressures.7.7 Pressure limit device, shall be installed to control over-pressure and shall be set at 1 000 Pa.7.6 Self-adhesive gasket material, strips of self-adhesive gasket material shall be installed on both compression frames (one constructed as part of the test chamber and the seco
35、nd on used to hold the specimen in place) and the corners shall be glued or fused.7.7 Air impermeable material, non-permeable flexible material (such as 0,15-mm thick polyethylene film) is used to wrap the specimen to determine the air leakage of the test apparatus before conducting the air permeanc
36、e test of the material.7.8 Clamping devices, twelve clamping devices (such as C-clamps) used to clamp the two compression frames together after the specimen has been installed in the test chamber.8 Procedures8.1 Specimen installationCut the air impermeable material to 1,4 m 1,4 m.8.1.1 Self-supporti
37、ng materialsRemove the protective paper from one side of the self-adhered, medium-density gasket strip and install onto the edges of the test specimen in a manner that the area inside the strips is 1 m 1 m. Fuse or glue the corners. Install a second strip of medium-density gasket material outside th
38、e first strip and fuse or glue the corners.Remove the protective paper on the top side of the self-adhered gasket material and install the test specimen with the gasket material side down onto the centre of a piece of flexible air impermeable material. Ensure that the gasket strip is adhered to the
39、flexible air impermeable material.On the top side of the specimen, remove the protective paper from self-adhered gasket material and install onto the edges of the test specimen in a manner that the area inside the strips is 1 m 1 m and that the gasket is positioned over the gasket strip on the other
40、 side of the test specimen. Fuse or glue the corners. Install a second strip of self-adhesive gasket material outside the first strip and over gasket material on the other side of the test specimen. Fuse or glue the corners.Cut the air impermeable material as shown in Figure 2.Wrap the air impermeab
41、le material over the edges of the test specimen as shown in Figure 3 and press into the self-adhering, medium-density gasket strips. Tape the joints with construction tape. ISO 2014 All rights reserved 3BS ISO 14857:2014ISO 14857:2014(E)Cut and remove all excess air impermeable material from inside
42、the self-adhesive gasket material, leaving an opening to the test specimen of 1 m 1 m.Install the test specimen assembly onto the compression frame attached to the test chamber with the air impermeable material facing up as shown in Figure 4.Install the second compression frame over the test specime
43、n assembly and clamp into place using three clamping devices on each side of the test apparatus.View the installed test specimen through the observation panels and confirm that it has been properly installed.8.1.2 Non-self-supporting materialsThe procedure for non-self-supporting material shall be t
44、he same as above with the addition of a rigid support. An open grill or wire mesh/screen with a square grid of a minimum of 25 mm 25 mm opening (or equivalent means of support) shall be used. The wire mesh/screen shall be welded or otherwise mechanically supported to a solid metal frame.Remove the p
45、rotective paper from one side of the self-adhered, medium-density gasket strip and install onto the edges of the test specimen in a manner that the area inside the strips is 1 m 1 m. Fuse or glue the corners. Install a second strip of medium-density gasket material outside the first strip and fuse o
46、r glue the corners.Remove the protective paper on the top side of the self-adhered gasket material and install the test specimen with the gasket material side down onto the centre of the open grill or wire mesh/screen. Ensure that the gasket strip is adhered to the open grill or wire mesh/screen.On
47、the top side of the open grill or wire mesh/screen, remove the protective paper from self-adhered gasket material and install onto the edges of the open grill or wire mesh/screen in a manner that the area inside the strips is 1 m 1 m and that the gasket is positioned over the gasket strip on the oth
48、er side of the open grill or wire mesh/screen. Fuse or glue the corners. Install a second strip of self-adhesive gasket material outside the first strip and over gasket material on the other side of the open grill or wire mesh/screen. Fuse or glue the corners.Cut the air impermeable material as show
49、n in Figure 2.Wrap the air impermeable material over the edges of the test specimen as shown in Figure 3 and press into the self-adhering, medium-density gasket strips. Tape the joints with construction tape.Cut and remove all excess air impermeable material from inside the self-adhesive gasket material, leaving an opening to the test specimen of 1 m 1 m.Install the test specimen assembly onto the compression frame attached to the test chamber with the air impermeable material facing u
