The article addresses to a new method of heat transfer enhancement using porous gauze materials. The work covers the principle of iterchannel coolant transpiration which combined high intensity of heat exchange inherent in highly heat-conducting porous materials and low hydraulic losses. The article presents the experimental results of hydraulic resistance for one- and two - dimensional coolant filtering. The authors formulate generalizing criterion equation of heat exchange for two dimensional coolant flow through a porous gauze martial. Optimal material parameters are defined. The article demonstrates high efficiency of porous heat exchange path with interchannel coolant transpiration in composition to plain and finned paths.