There are 10 exterior air conditioners, 15 ducts, and 20 ventilators base meshes made in 3dsmax and unwrapped in Rizomuv.
They are low poly and ready to turbosmooth (subdivide). To get better results you can use turbosmooth level 2 or 3, or use some levels of subdivision.
To make ducts, you can combine objects and make your ducts.
File format: .max, .fbx, .obj
3ds max version 2018
OBJ (OBJ, filesize: 396 MB), FBX (Autodesk FBX, filesize: 198 MB), MAX (Autodesk 3ds Max, filesize: 396 MB)