The extension tunnel ZTR is used for extension of rigid sun tunnels TWR, TLR and TCR when the distance from roof to ceiling level exceeds 1.70 m. The tunnels can be extended with sections of ZTR up to a maximum of 6.0 m. ZTR comes with Flexi Loc for easy assembly.

The extension tunnel can be purchased in 64cm and 124 cm lengths.

Ventilation outlet ZTV supplements the existing ventilation in the room. The ventilation outlet can be installed with sun tunnels TWF 0K14 and TWR 0K14.

Light kit ZTL 014L gives light in your sun tunnel when it is dark outside. The kit is supplied with a 4W LED light bulb (corresponding to a 40W incandescent bulb).

The light kit can be installed at any time. Fits both 10” and 14” rigid and flexible sun tunnels. Low energy LED technology provides a long lifetime of dependable light (approx. 18 years), while the slim line design eliminates shadows on the diffuser pane.

Diffuser pane ZTC comes with a frosted look as standard. However, the following structured panes can deliver a totally unique look for your sun tunnel, and can be ordered as accessories:

• Ice crystal structure - diffuser pane ZTC 0001 
• Prism structure - diffuser pane ZTC 0002

Seen from the room, the ceiling trim ring ZTB forms an attractive, contrasting ring around the diffuser pane. The diffuser pane comes with a white trim ring as standard. Coloured plastic trim rings with brushed aluminium, copper, black or brass look can be ordered as accessories.

Blackout blind ZTK 010B/014B for sun tunnels - ideal for blackout in sleeping areas such as children's rooms or siesta areas. Available for both 10" and 14" sun tunnels. Easy installation - just attach the magnets inside the ceiling ring. Made from a durable, lightweight material to prevent risk of personal injury.

Easy to fit and remove manually with a rod. Available in black.

VELUX A/S has developed a kit that lowers the u-value in a standard sun tunnel installation. We see a trend on the markets where low u value is of great importance and in some instances a legal requirement. Therefore, we have insulated the trim ring and added an extra two layer pane.

• Lowers the u-value from 2.9 W/m2K to 1.8 W/m2K
• Discrete design
• Easy mounted on already installed sun tunnels.