An inline exhaust fan is best defined as a fan that is mounted inline (inside or connected to ducting) that is used for extraction purposes. An inline fan does not sit directly on the plasterboard or ceiling, instead it is typically located inside the attic or roofspace a little bit further away from the room.
Benefits of using an inline fan
- Reduced Noise As the fan is located further away in the roofspace and not directly above you the noise levels within the room you are extracting from will be less.
- High Power Inline fans are available in large sizes with very high power motors. Quite often this type of power is simply not available from a standard ceiling mounted or wall mounted extraction fan.
- Length of duct run Inline fans are engineered to work with ducting. This means they will retain a greater percentage of their advertised capacity in comparison to basic extraction fans. This is particularly useful if you have a great distance from the extraction point to the outlet. For example if you want to extract your bathroom to a roof vent and the distance is relatively long (6m or more). This makes the fans useful for other applications such as heat transfer and sub floor ventilation.
- More than one intake point With an inline fan it is possible to create multiple inlet or outlets by using a Y Junction or BTO. This is particularly useful if you have a large room and wish to have 2 intake points, or again for a heat transfer kit that services multiple rooms.