This model is a sample from Wooden Windows Multicolor
In blender glass part is one sided plane
Exported fbx (used in unity) has two glass planes to prevent only one side render
Mesh:
• Vertices - 202
• Edges - 364
• Polygons - 170
• Tris - 338
Unity:
• Model consists of two materials, one main and second for glass
• Animation is not setup in controller, to preview click on it
and drag prefab to the corresponding window in the lower right corner