Leo stared at the heat map of his city’s downtown core. On his screen, the "urban heat island" was a glowing, angry red. For his final urban design thesis, he needed to prove that adding a vertical forest to the central plaza would drop the temperature by at least three degrees. He knew there was only one tool precise enough for this kind of 3D microclimate modeling: He went straight to the official ENVI-met download page
Look on academic repositories like Zenodo or GitHub under "ENVI-met 4.4.5 archive." Some university climate labs host the installer. Note that ENVI-met GmbH no longer officially supports this version, but it runs fine on Windows 10/11. envi-met software free download
Even with the 50x50x25 grid limit, you can produce meaningful results: Leo stared at the heat map of his city’s downtown core