I like the idea of having a window in the bathroom, but I hate the mildew and water damage. This is a great idea with having a shower curtain over the window while in use, but open the rest of the time.
For one day? maximize small bathroom space if you want separate shower and tub by putting tub against the wall, installing shower right next to it, and closing off the shower with glass. - My-House-My-Home
32 Ideas of Bathroom Remodels for Small Spaces You’ll Want to Copy