Title: DEM models of Flare emission Author_list: McTiernan, J., Caspi, A., Hudson, H. Abstract: We use data from RHESSI and other spacecraft (GOES, GOES-SXI, EIT, TRACE)to determine the characteristics of thermal emission during solar flares. Previous attempts to do this have been hampered by the assumption that flare thermal emission has a single temprature. We now have a method for calculating the differential emission measure for high temperature flare emission, while accounting for contamination of the spectrum due to the presence of nonthermal emission. This gives a more accurate measure of the amount of energy that is released into high temperature (3 to 20 MK) plasma.