The modern advances in bathroom fan technology have allowed for extremely quiet operation of today's bathroom ventilation fans. We have a number of ventilation fans that will suitably ventilate humidity and odor from your bathroom. 50 CFM fans (cubic feet per minute) are ideal for powder rooms, while 80 CFM fans are ideal for 1/2 bathrooms, while fans that are above 100 CFM will work well in an application where a shower or tub is present.