Calibrated simulation of a NZEB: The Solar Decathlon China 2018 SCUTxPoliTo Prototype. The aim of this work was to test a fast way to calibrate a Building Energy Model able to perform a dynamic simulation of the behaviour of a single-family house. In particular, the case study was the SCUTxPoliTo prototype and the calibration was done with the scope of refining and enhancing the reliability of the model of the house during the contest conditions and for further energy planning, optimization and last days modification. The performed Calibration relies on the computer aided optimization. The first step was to set up a data collection campaign to monitor the behaviour of the prototype, considering the envelope, the energy systems and the outdoor weather [1].