Fan unit

A fan unit comprising:

• a fan blower configured to emit air in a plurality of directions in an air flow plane;
• first, second, third and fourth guide means, each said guide means having a guide surface thereon, defining first, second, third and fourth guide surfaces;
• said first and second guide surfaces disposed on a first side of the fan blower In the airflow plane, the first and second guide surfaces defining together, at least partially, the radially outer boundary of a first airflow path leading to a first airflow channel;
• said third and fourth guide surfaces disposed on a second, opposite, side of the fan blower in the air flow pane, the third and fourth guide surfaces defining together, at least partially, the radially outer boundary of a second airflow path leading to a second airflow channel;
• wherein the fan unit comprises a first wall means on the first side of the fan blower, the first guide surface touching the first wall means at a first point and the second guide surface touching the first wall means at a second point displaced from the first point, so that the portion of the first wall means between the first and second points effectively defines a further guide surface, and the fan unit comprises a second wall means on the second side of the fan blower, the third guide surface touching the second wall means at a first point and the fourth guide surface touching the second wall means at a second point displaced from the first point, so that the portion of the second wall means between the first and second points effectively defines a further guide surface.