AbstractBurnout and heat-transfer correlations have been obtained from experimental data in a‘Once-Through Superheat’channel with an exponential heat distribution. Such an electrically heated channel permits local heat fluxes to approach burnout limits in order to maximize total heat input to a test section. Data as a function of the process variables include burnout heat flux in the high quality region and superheat production from 0 to 235°F. The range of the independent process variables are: pressure, 520 to 1900 lb/in.2(gage); flow, 0.0108 to 0.242×106lb/h-ft2, and subcooling from 0 to 327°F. Several comparisons with data in the literature including one for high quality film boiling are made.