This is the release of the observational data product for eddy covariance fluxes at 73 stations in the ecosystem domain, part of them outside the ICOS network, covering the period 1989-2020. The data are in the standard format used for the ICOS L2 ecosystem products and also used by other regional networks like AmeriFlux. The processing has been done using the ONEFlux processing pipeline (https://github.com/icos-etc/ONEFlux) and is fully compliant and integrable with the FLUXNET2015 release (https://fluxnet.fluxdata.org/) and other datasets processed with the same pipeline (AmeriFlux, ICOS L2).