The Sahara Exhaust Fan The Ventair Sahara Exhaust Fan heats bathrooms more effectively than other 3-in-1 models, thanks to its fan powered heater. It circulates heated air around the room, warming the entire space. The fan can also be used for cooling, making the Sahara a good choice for Summer as well as Winter. Most importantly, the Sahara features a high capacity fan suitable for medium to large size bathrooms. This is an excellent model to maintain a comfortable and hygienic environment.