EN 1264-2 : Water based surface embedded heating and cooling systems - Part 2: Floor heating: Methods for the determination of the thermal output using calculations and experimental tests.

This standard forms part of the EN 1264 series relating to embedded heating and cooling surface systems installed in the building envelope of residential and non-residential buildings, intended to provide thermal comfort and, where applicable, using heat transfer fluids other than water. It specifies the boundary conditions and the methods for determining, by calculation and measurement, the thermal output of hydronic floor heating systems circulating hot water, as a function of the temperature difference between the fluid and the indoor environment. The calculation method applies to system types A, B, C, D, H, I and J as defined in EN 1264-1, while the measurement method covers all other systems; both methods provide consistent results. The results establish the standardised surface thermal output, the associated standardised temperature difference, and the families of characteristic curves. Suspended ceilings with thermally induced air circulation are excluded.