When to Replace Your Exhaust Fans Routine cleaning will help extend the life of your exhaust fans, but they wont last forever. The average life of a bathroom exhaust fan is about ten years, and kitchen hood fans tend to hang in there a little longer at around 15 years.
How do I know if I need a new bathroom fan?
If the air in your bathroom feels thick and stuffy — its likely your bathroom exhaust fan needs to be replaced. In order to prevent a serious mold problem from developing, a fully functioning bathroom exhaust is needed to draw out the excess moisture.
Can a bathroom fan burn out?
If the bathroom fan fails, it can ignite combustible dust and structural framing materials which can lead to a major fire loss. And bathrooms arent the only places you will find these fans. This is not high enough to trip the circuit breaker, but it is high enough to overheat the motor windings and cause a fire.