Energy losses lead to heat leaving processes either bound to material flows or to being emitted directly to the process environment. This heat is called waste heat and can often be transferred into other processes, leading to savings in high exergy energy sources. How much energy is emitted as waste heat and at what temperature levels, is highly contextual to the observed process. While evaluating waste heat sources regarding their usability, quantity and temperature levels are important factors, although further concrete planning and implementation steps need to consider many additional techno economical conditions. “INXS Industrial Excess Heat – Analysis of industrial waste heat potential in Austria” is a research project that tries to evaluate the total potential of waste heat in the Austrian industry sector. As part of this project, it is the goal of this thesis to estimate the waste heat potential of the cement, lime, and parts of the chemistry industry. The thesis builds its modeling framework solely on publicly available data. Despite the limitations of this method the thesis aims to create sound and accurate estimates. While the models for the cement and lime industry are process specific, the models for the chemistry sector had to adopt waste heat factors of other studies. In total 21 industry firms where evaluated, which have an estimated technical waste heat potential of 1,23 TWh. This equals about 0,39 % compared to the total Austrian final energy demand. The economical potential might be significantly lower, especially since the waste heat in the evaluated sectors primarily is emitted at temperatures lower than 100 °C.