This work deals with improved ways to characterize the local heat transfer inside smooth circular channels. The objectives are to: (I) measure local (axial) channel wad temperatures, and (2) make comparative predictions of local subcooled flow-boiling heat transfer for the case of the a uniformly heated channel. Flow boiling experiments were conducted with Freon-11 in horizontal, copper, uniformly heated coolant channels with smooth walls. Temperature measurements were made on the outside surface of the copper channel at four circumferential and seven axial locations. Comparisons were made for inside computed wall temperature and the axial mean circumferential heat transfer coefficient with a subcooled flow-boiling model based on the assumption of large Froude number The predictions served as a comparative baseline and a qualitative check for the data.