A powerflue is an open fronted gas appliance with an electronically driven fan system either semi recessed or surface mounted on the outside of the wall to expel the flue gases and as such a sound is to be experienced when the fan is turned on.
When the fire is not in use, some natural air circulation may occur through the flue terminal, which is quite normal. There are two types of power flue options available, a rear flue or side flue* for left and right applications in instances where it is not possible to rear flue through the chosen wall (conditions apply*).
