Fans in the bathroom are desirable, especially when the bathroom has a window that cannot be opened. It is useful for removing unwanted odors as well as excessive moisture from one taking a hot shower. There're several different options available for various bathroom fans, and a few that are more suitable than others in various circumstances.
Window Bathroom Fans
The easiest form of ventilation is to open up a window. When you have a working window, you could supplement that with a window fan. While the standard box fan will make a difference in removing the bad odor, they are quite cumbersome. A few fans that are specifically designed for ventilation utilize a string of smaller fans that will form a seal in your bathroom window.
Bathroom Ventilation Systems
A permanent answer to good ventilation in the bathroom is having a complete room fan installed that will vent the air to the outside of the home. The majority of these particular systems are typically controlled with the light switch, so that they will not take up any additional outlet space.