[The scientific bases of the document "Health Standards and Regulations for the Design and Operation of Centralized Hot Water Supply Systems"].

Scientific substantiation of the choice of a heat supply system, of temperature regimen for the hot water, of the scale of laboratory-production control over the hot water quality, conditions for the hydrochemical washing out of the tubes depending on the heat supply system is given in the article. Requirements to accumulating tanks which, in case of disturbances in the operational regimen, may produce unfavourable effects on the hot water quality.