EN 1934:1998

Thermal performance of buildings - Determination of thermal resistance by hot box method using heat flow meter - Masonry

This Standard establishes the principles and criteria to be complied with for the determination of the laboratory steady-state heat transfer properties of masonry walls in a hot box by means of a heat flow meter mounted on one face of the masonry wall to be tested (i.e. the test specimen). It describes the apparatus, measurement technique and necessary data reporting. It does not, however, specify a particular apparatus design since requirements vary particularly in terms of size, and also to a lesser extent in terms of operating conditions.

Wärmetechnisches Verhalten von Gebäuden - Messung des Wärmedurchlaßwiderstandes Heizkastenverfahren mit dem Wärmestrommesser - Mauerwerk

Diese Europäische Norm stellt die Grundlagen und Kriterien auf, die im Labor bei der Bestimmung der stationären Wärmeübertragungseigenschaften von Wänden aus Mauerwerk in einem Heizkasten mit einem auf einer Seite der zu prüfenden Wand aus des Mauerwerks (d.h. des Prüfkörpers) befestigten Wärmestrommesser einzuhalten sind. Sie beschreibt das Gerät, die Meßtechnik und die notwendige Datenangabe. Sie legt jedoch keine spezielle Geräteausführung fest, da die Anforderungen besonders hinsichtlich der Größe und auch in einem geringerem Maße hinsichtlich der Betriebsbedingungen unterschiedlich sind

Performance thermique des bâtiments - Détermination de la résistance thermique selon la méthode de la boîte chaude avec fluxmètre - Maçonnerie

La présente norme établit les principes et les critères à respecter pour déterminer en laboratoire les propriétés de transmission thermique en régime stationnaire des murs de maçonnerie dans une boîte chaude au moyen d'un fluxmètre monté sur une face du mur à essayer (autrement dit l'éprouvette). Elle décrit l'appareil, la technique de mesurage et le contenu nécessaire du rapport d'essai. Elle ne spécifie cependant pas une conception particulière de l'appareil étant donné que les exigences peuvent varier, en particulier les dimensions et, dans une moindre mesure, les conditions de fonctionnement.

Toplotne karakteristike stavb – Določanje toplotnega upora s komorno metodo z uporabo merilnikov toplotnega toka - Zid

General Information

• Status: Published
• Publication Date: 17-Mar-1998
• ICS: 91.060.10 - Walls. Partitions. Facades
• ICS: 91.080.30 - Masonry
• ICS: 91.120.10 - Thermal insulation of buildings
• Technical Committee: CEN/TC 89 - Thermal performance of buildings and building components
• Drafting Committee: CEN/TC 89/WG 8 - Thermal test methods
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 19-Oct-2020
• Completion Date: 14-Apr-2025
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/BC/CEN/91/4 - CPD: Thermal insulation
• Ref Project: SIST EN 1934:1999 - Thermal performance of buildings - Determination of thermal resistance by hot box method using heat flow meter - Masonry

Overview

EN 1934:1998 (CEN) defines the principles and criteria for determining the thermal resistance of masonry walls in the laboratory using the hot box method with a heat flow meter mounted on one face of the test specimen. The standard focuses on establishing steady‑state heat transfer properties of masonry and describes the required apparatus, measurement technique and necessary data reporting. It does not mandate a single apparatus design, acknowledging variation in size and operating conditions between test facilities.

Keywords: EN 1934, thermal performance, hot box method, heat flow meter, masonry, thermal resistance, CEN standard.

Key Topics

• Scope and purpose: Laboratory determination of steady‑state thermal resistance for masonry walls using a heat flow meter on one face.
• Apparatus description: General principles for hot box test rigs and the use of heat flow meters, while allowing flexibility in specific equipment design and dimensions.
• Measurement technique: Procedures to obtain steady‑state heat transfer measurements across the masonry test specimen using a heat flow sensor mounted on the test face.
• Data reporting: Requirements for recording and reporting test results, test conditions and specimen identification to ensure reproducibility and comparability.
• Variability considerations: Recognition that requirements vary with apparatus size and operating conditions; the standard sets criteria rather than prescriptive hardware specifications.

Applications

EN 1934:1998 is practical for organizations and professionals involved in building thermal performance and product evaluation:

• Testing laboratories conducting laboratory hot box measurements of masonry elements to determine R‑values.
• Masonry product manufacturers validating thermal resistance claims and supporting product data sheets.
• Building designers and energy modelers seeking laboratory‑verified thermal inputs for simulation and compliance.
• Regulatory bodies and certification schemes that require standardized test data for compliance with energy performance regulations.
• Research institutions studying masonry thermal behavior under steady‑state conditions.

Practical uses include verifying declared thermal performance of masonry units and assemblies, producing comparable laboratory data for product certification, and providing validated inputs for energy modeling and compliance with building thermal regulations.

Related Standards

EN 1934 complements other CEN/ISO standards and technical guidance that address thermal performance, hot box techniques and heat flow measurement methods for building elements. It aligns with the general ICS scope for thermal insulation (91.120.10) and masonry (91.080.30) and is intended to be used alongside relevant national and international test standards when applicable.

For implementation, consult EN 1934:1998 for the definitive criteria, test description and reporting requirements.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wärmetechnisches Verhalten von Gebäuden - Messung des Wärmedurchlaßwiderstandes Heizkastenverfahren mit dem Wärmestrommesser - MauerwerkPerformance thermique des bâtiments - Détermination de la résistance thermique selon la méthode de la boîte chaude avec fluxmetre - MaçonnerieThermal performance of buildings - Determination of thermal resistance by hot box method using heat flow meter - Masonry91.120.10Toplotna izolacija stavbThermal insulation91.080.30Zidane konstrukcijeMasonryICS:Ta slovenski standard je istoveten z:EN 1934:1998SIST EN 1934:1999
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