Can I use a smaller diameter duct than what the fan is designed for? | Bath Fans | Support

Skip to Content

Bath FansCan I use a smaller diameter duct than what the fan is designed for?

Can I use a smaller diameter duct than what the fan is designed for?

This is not recommended. It will cause the fan to run harder, greatly reducing the CFM performance of the fan and create excess noise.

Need more help?

Ask a different questionBath Fans

Select a different product