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BS EN 1264-3:2021

BS EN 1264-3:2021

$142.49

Water based surface embedded heating and cooling systems – Dimensioning

Published By Publication Date Number of Pages
BSI 2021 24
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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 EN 14037 series and EN 14240.

EN 1264?3 specifies the use in practical engineering of the results coming from EN 1264?2 and EN 1264?5.

For heating systems, physiological limitations are taken into account when specifying the surface temperatures. In the case of floor heating systems the limitations are realized by a design based on the characteristic curves and limit curves determined in accordance with EN 1264?2.

For cooling systems, only a limitation with respect to the dew point is taken into account. In predominating practice, this means that physiological limitations are included as well.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 1 Scope
2 Normative references
7 3 Terms and definitions
4 Heating systems
4.1 Floor heating systems
4.1.1 Basic principles
4.1.1.1 Temperature difference between heating water and room
4.1.1.2 Characteristic curve
4.1.1.3 Field of characteristic curves
8 4.1.1.4 Limit curves
4.1.1.5 Thermal inertia
4.1.2 Boundary conditions
4.1.2.1 Flow pipes to adjacent rooms
4.1.2.2 Thermal insulation
11 4.1.3 Design
4.1.3.1 Pressure loss
4.1.3.2 Design specific thermal output
4.1.3.3 Determination of the design flow temperature
13 4.1.3.4 Heating Mode — Determination of the water flow rate
4.1.4 Peripheral areas
14 4.2 Ceiling heating systems
4.2.1 Basic principles
4.2.1.1 Temperature difference between heating water and room
4.2.1.2 Characteristic curve
4.2.1.3 Field of characteristic curves
4.2.1.4 Limit curve
4.2.2 Boundary conditions
4.2.2.1 Flow pipes to adjacent rooms
4.2.2.2 Thermal insulation
15 4.2.3 Design
4.2.3.1 Pressure loss
4.2.3.2 Design specific thermal output
4.2.3.3 Determination of the design flow temperature
4.2.3.4 Determination of the water flow rate
4.3 Wall heating systems
4.3.1 Basic principles
4.3.2 Boundary conditions
4.3.2.1 Flow pipes to adjacent rooms
16 4.3.2.2 Thermal insulation
4.3.3 Design
4.3.3.1 Pressure loss
4.3.3.2 Design specific thermal output
4.3.3.3 Determination of water flow temperature
4.3.3.4 Determination of the design heating water flow rate
5 Cooling systems
5.1 General
5.1.1 Basic principles
5.1.2 Temperature differences
5.1.3 Regional dew point and standard indoor room temperature
17 5.1.4 Temperature difference between room and cooling water
5.1.5 Characteristic curves
5.1.6 Field of characteristic curves
5.1.7 Limit curve
18 5.1.8 Thermal insulation
5.2 Design
5.2.1 Pressure loss
5.2.2 Design specific cooling load
5.2.3 Determination of the design flow (inlet) temperature and the design specific thermal output
5.2.3.1 General
5.2.3.2 Design based on standard water temperature difference ΔϑC,N and calculation of the general design flow (inlet) temperature ϑC,in,des
20 5.2.3.3 General design, especially design with higher values σC
5.2.4 Determination of the design cooling water flow rate
21 Annex A (normative)Figures

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BS EN 1264-3:2021
$142.49