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BS EN 1264-2:2021

BS EN 1264-2:2021

$167.15

Water based surface embedded heating and cooling systems – Floor heating. Methods for the determination of the thermal output using calculations and experimental tests

Published By Publication Date Number of Pages
BSI 2021 44
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The EN 1264 series gives guidelines for surface embedded heating and cooling systems installed in buildings, residential and non-residential (e.g. office, public, commercial and industrial buildings) and focuses on systems installed for the purpose of thermal comfort.

The EN 1264 series gives guidelines for water based heating and cooling systems embedded into the enclosure surfaces of the room to be heated or to be cooled. It also specifies the use of other heating media instead of water, as appropriate.

The EN 1264 series specifies standardized product characteristics by calculation and testing the thermal output of heating for technical specifications and certification. For the design, construction and operation of these systems, see EN 1264?3 and EN 1264?4 for the types A, B, C, D, H, I and J. For the types E, F and G, see the EN ISO 11855 series.

The systems specified in the EN 1264 series are adjoined to the structural base of the enclosure surfaces of the building, mounted directly or with fixing supports. The EN 1264 series does not specify ceiling systems mounted in a suspended ceiling with a designed open air gap between the system and the building structure which allows the thermally induced circulation of the air. The thermal output of these systems can be determined according to the EN 14037 series and EN 14240.

EN 1264?2 specifies hot water floor heating systems. The application of EN 1264?5 requires the prior use of EN 1264?2. EN 1264?5 specifies the conversion of the thermal output of floor heating systems determined in EN 1264?2 into the thermal output of heating surfaces embedded in walls and ceilings as well as into the thermal output of cooling surfaces embedded in floors, walls and ceilings.

EN 1264?2 specifies the boundary conditions and the test methods for the determination of the thermal output of hot water floor heating systems as a function of the temperature difference between the heating medium and the room temperature.

The thermal output is tested by a calculation method and by a measurement method. The calculation method is applicable to systems corresponding to the definitions in EN 1264?1 (type A, B, C, D, H, I and J). The measurement method gives guidance for systems not corresponding to these definitions. The calculation method and the measurement method are consistent with each other and provide correlating and adequate test results.

The test results, expressed depending on further parameters, are the standard specific thermal output and the associated standard temperature difference between the heating medium and the room temperature as well as fields of characteristic curves showing the relationship between the specific thermal output and the temperature difference between the heating medium and the room.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
8 3 Terms and definitions
4 Thermal boundary conditions
9 5 Documents for testing
6 Calculation of the specific thermal output (characteristic curves and limit curves)
6.1 General approach
11 6.2 Systems with pipes installed inside the screed (types A, C, H, I, J)
13 6.3 Systems with pipes installed below the screed or timber floor (type B)
14 6.4 Systems with surface elements (plane section systems, type D)
15 6.5 Limits of the specific thermal output
17 6.6 Influence of pipe material, pipe wall thickness and pipe sheathing on the specific thermal output
6.7 Thermal conductivity of screed with inserts
18 7 Thermal conductivity of the materials
8 Downward heat loss
19 9 Test procedure for the determination of the thermal output of systems that cannot be calculated in accordance with Clause 6
22 10 Test report
11 Test system
11.1 General
11.2 Master samples
23 11.3 Verification of test equipment
11.4 Determination of the values sm and ϕM,s (qN,M,s, qG,M,s(Rλ;B = 0,15)) of primary master samples
11.5 Verification of software
24 12 Calculation of the specific heat capacity of the system (C-Value)
25 Annex A (normative)Figures and tables
40 Annex B (normative)Influence of the heat exchange coefficient inside the pipe on the specific thermal output
41 Annex C (normative)Material data

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BS EN 1264-2:2021
$167.15