What is BS EN 1264‑3 about?
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 calculating 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.
Who is BS EN 1264‑3 for?
BS EN 1264‑3 on water-based heating and cooling systems is useful for:
- Commercial HVAC manufacturers
- Underfloor Heating System Manufacturers
- Manufacturers of components used in heating and cooling systems
- Builders / Architects
Why should you use BS EN 1264‑3?
Water-based heating and cooling systems need to be built in consideration with the rooms they are going to be installed in. The area of rooms affects the dimensions of these heating and cooling systems. Incompatible dimensioning of water-based surface embedded heating and cooling systems can affect their functionality.
BS EN 1264‑3 will give you general dimensions for water-based surface embedded heating and cooling systems that you can alter as per the specifications of your project. BS EN 1264‑3 will ensure your water-based surface embedded heating and cooling systems perform as they are intended no matter the variations in specifications.
What’s changed since the last update?
BS EN 1264‑3:2021 supersedes BS EN 1264‑3:2009, which is withdrawn. BS EN 1264‑3:2021 includes some technical and editorial changes with respect to BS EN 1264‑3:2009. These include:
- Clarification of the Scope and Improved wording, especially the term proves the method
- Addition of new subclauses 4.1.3.1, 4.2.3.1, 4.3.3.1 and 5.2.1.1 Pressure loss and Deletion of the Note in 4.1.2.2
- Modification of the maximum average surface temperature for ceiling heating systems in 4.2.1.4
- Figures 1 and 3 replaced with Figures A.2 and A.3
- Correction of Formula (15) from 1/α = 0,009 3 (m2∙K)/W to 1/α = 0,092 6 (m2∙K)/W
