Description

Velux Sun Tunnels are for use on roofs of buildings to provide natural light into interior spaces within buildings.

Velux offers four models of Sun Tunnels:

• TWF, which features flexible internal ducting, and
• TWR,  which use rigid ducting
• TLR, which use rigid ducting
• TCR, which use rigid ducting

All models are suitable for roof pitches between 15° and 60°.

The TCR model can be used at pitches between 0° and 60°.

Some models can also be used to provide ventilation.

Scope

1. Velux Sun Tunnels (TWF, TWR and TLR) have been appraised for use on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regard to building height and maximum floor plan area; and,
• with roof structures designed and constructed to meet the requirements of the NZBC; and,
• with pitched roof cladding types and profiles specified in NZBC Acceptable Solution E2/AS1; and,
• with a roof pitch between 15º and 60°; and,
• situated in NZS 3604 Wind Zones up to, and including, Extra High.

2. Velux Low-Pitch Sun Tunnels (TCR) have been appraised for use on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regard to building height and maximum floor plan area; and,
• with roof structures designed and constructed to meet the requirements of the NZBC; and,
• for use on flat or nominally flat roofs making use of membrane roof systems; and,
• with a roof pitch between 0º and 60°; and,
• situated in NZS 3604 Wind Zones up to, and including, Extra High.