For full functionality, we recommend downloading the original file.The viewer version is intended only for use in the web viewer. In the source file, the following are fully preserved:✔ native scene structure✔ all materials without simplification✔ correct PBR texture maps✔ proper object namingIf you plan to use this model in production, choose the source file.Exhaust air fans transport stale air directly outdoors Designed for sci fi and urban environments.