The following data are collected by running five experiments on three buildings located in the Living Lab Energy Campus (LLEC) Experimental Buildings of the Energy Lab at the Karlsruhe Institute of Technology (KIT). All three buildings have identical building envelopes and are supplied with district heating energy. The purpose of these experiments is to evaluate the performance of three control strategies for heating demand response in nearly identical conditions. The related published article under the title “Experimental evaluation of model predictive control and fuzzy logic control for demand response in buildings” can be found at: 10.1016/j.apenergy.2025.126666. For the full description of the experiments, please refer to the article and the README file.