But that doesn’t mean these fans aren’t effective, especially if you have a relatively small bathroom (roughly less than 50 square feet). To choose which bathroom exhaust fans to test ...

He adds that some models come with a range of CFM that can be adjusted to suit your bathroom ventilation needs. Yes.

We tested a variety of fans for 4-inch and 3-inch ducts to find the best bathroom exhaust fans for airflow ... in a range of cubic feet per minute (CFM)—many at 110 CFM (for larger bathrooms ...