1.5.6 Sun tunnels
Orientation is a crucial factor influencing Sun Tunnel's performance. These products are intended to transport intense sunlight to diffuse it into useful daylight in deep areas of buildings or areas where a window is not necessary but daylight is wanted. Sun Tunnels should be oriented to maximise their exposure to direct sunlight.
Length and configuration:
The length of a Sun Tunnel influences the number of inter-reflections needed for sunlight to reach the interior of a room. While shorter Sun Tunnels will deliver more light, the very high reflectiveness of the metal material used in them allows sunlight to be efficiently transported over long distances up to 6m. Rigid Sun Tunnels will deliver more light than flexible Sun Tunnels.
The transmittance and optical properties of the diffuser influence both the amount and distribution of daylight from Sun Tunnels. As the name suggests, the diffuser takes the direct sunlight coming down the Sun Tunnel and diffuses it to achieve a good distribution of daylight in the room.