Why opening a window may not be enough
A window can help, but it depends on weather, security and someone remembering to use it. Cold outdoor air can also make the room uncomfortable during winter.
Mechanical extraction provides a consistent route for moist air. It is particularly important in internal bathrooms and rooms used by several people.
How extractor fans are controlled
Fans may operate with the light, a timer, a humidity sensor or a separate control. The best choice depends on household habits and how long moisture remains after bathing.
An overrun timer lets extraction continue after someone leaves. Humidity control can help when showers are used without the main light.
- Light-linked control
- Overrun timer
- Humidity sensor
- Continuous low-rate ventilation
Ducting and replacement air matter
Long, crushed or poorly routed ducting reduces airflow. Condensation within an unsuitable duct can also create noise or staining elsewhere.
Air must be able to enter the bathroom as the fan removes it. A correctly sized door gap or another designed air path helps the system work.
Signs ventilation needs attention
Persistent condensation, peeling paint, mould and damp towels can suggest the room is not drying. The cause may be fan performance, heating, air supply or the way the room is used.
Bathroom electrical zones and building requirements affect installation. Ask a suitable professional to assess upgrades rather than choosing a fan by appearance alone.
