Abstract Constructing a large-volume detector filled with 10 kt of liquid scintillator is envisaged at the Baksan Neutrino Observatory in the Caucasus. This is aimed at detecting fluxes of natural neutrinos with energies up to 100 MeV. The predicted fluxes of such neutrinos and the response of the proposed detector are discussed. This facility is conceived as an integral part of the worldwide net of neutrino detectors aimed at measuring the natural neutrino fluxes.