EN 1934 Thermal Performance of Buildings - Determination of Thermal Resistance by Hot Box Method Using Heat Flow Meter - Masonry

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of EN 1934 testing. This standard specifies principles and criteria to be followed for the laboratory determination of 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 wall to be tested (eg test sample). Explains the apparatus, measurement technique and required data reporting. However, it does not specify a specific apparatus design, as the requirements differ in particular in terms of size and also, to a lesser extent, operating conditions.

The influence of moisture content on the thermal properties of the wall can be taken into account by measurements made at different moisture contents of the sample in the practical moisture content range, including the dry state, which most often corresponds to the test condition.

Many wall elements are such that in practice the heat transfer through them is a complex combination of conduction, convection, radiation and mass transfer. The method described in this standard determines the total amount of heat transferred from one side of the boiler.

However, heat transfer properties generally depend on the sample itself and boundary conditions, sample dimensions, heat transfer direction, temperatures, temperature differences, air velocities, and relative humidity. As a result, test conditions copy or can be converted to those of the intended application. Conventional test conditions are adopted during tests so that results can be easily compared. The tested values ​​are the basis used in the conversion procedures to obtain the appropriate design values.

Results from a single sample may not be representative or valid for all samples of a masonry wall and product standards should be consulted for proper sampling. The design and operation of the heat flow meter hot box is a very complex matter. It is essential that the designer and user of such apparatus have extensive background knowledge in heat transfer and experience in precision measuring techniques.

EUROLAB assists manufacturers with EN 1934 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.