New construction in homes or offices all require proper ventilation in the bathroom to improve air flow and remove excess humidity. Exhaust fan or extractor fans are sized and rated based on their ability to move air quickly (measured in CFMs or cubic feet per minute). Larger CFMs are best for bigger bathrooms, so make sure you measure the size of the bathroom you are ventilating before you buy your bathroom fan. For new construction you may require flexible ducts to connect the fan to the rest of the HVAC system. For repairs or updates to existing units, see our selection of fan control switches and other fan parts to complete the job.