If you are looking for a fan that can provide you with a variety of speeds, then purchasing a 3-speed or 5-speed exhaust fan might be a better option for you. A 3-speed exhaust fan will allow you to adjust the speed from low, medium, or high, while a 5-speed exhaust fan will offer five different speeds. Both types of fans have their benefits and drawbacks. A 3-speed fan is less expensive, but it may not be able to provide you with the best speed range. On the other hand, a 5-speed fan is more expensive, but it will offer better performance in terms of speed and range. Ultimately, it is important to choose the fan that meets your needs and fits your budget.