The paper considers a promising eco-industrial waste-free W-CONDENSER-technology for the condensation of atmospheric moisture in the waters of the seas (oceans) based on the use of large-sized blocks to reduce the global shortage of fresh water. W-CONDENSER units can produce 4000 tons of fresh water per day and more. W-CONDENSER units are suitable as an eco-industrial system for water supply of the population, industry and agriculture with a dry climate of the territories, as well as for stabilization of natural sources of water supply (rivers, lakes, underground reserves, etc.) subject to the necessary energy supply (NPP, TPP, etc.), atmospheric humidity and favorable sea wind rose of the region. The authors presented a calculated assessment of the main technical parameters of the design and construction of high-power large-sized W-CONDENSER units. Operation of W-CONDENSER provides for obtaining large volumes of fresh water, primarily for drinking purposes, as well as for agricultural, industrial and other needs.