EVS-EN 1264-2:2021

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.