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technical data 8000 6000 4000 2000 0 RIGID SUN TUNNEL (TWR) RIGID 6500* 2100* 1980^ 810^ 540^ 200^ FLEXIBLE SUN TUNNEL (TWF) FLEXIBLE 36W fluorescent tube 100W bulb 15W energy bulb 15W halogen bulb LIGHT SOURCE LUMEN OUTPUT TWR (Rigid) & TWF (Flexible) Tubular Sun Tunnels Non-vented, tubular shaft sun tunnel VELUX Sun Tunnels are ideal for flooding natural light in to small areas, such as corridors, hallways, walk-in wardrobes or spaces where it’s not possible to install traditional skylights. Available with rigid shaft (TWR) or flexible tube (TWF), the unit comes with an outer skylight that sits flat on the roof. Internally, a white, flush mounted ceiling fitting provides even light distribution over an area up to 9m 2 . Construction Easy to install, the skylight has an integrated polyurethane frame and flashing, together with flexible aluminium apron. Exterior colour dark grey and black. Integral to the frame, a 4mm toughened glass pane will not scratch/fade and has a ‘stay-clean’ coating which requires only an occasional hosing down (exterior clean only). The flexible TWF can be used to circumvent obstructions in the roof cavity, while the TWR utilises two 45° elbows for most direct ‘line-of-sight’ applications. Standard shaft lengths can be extended with the addition of the rigid extension kit ZTR 014 (1240mm long). The ceiling fitting consists of an opaque, double layered diffuser to soften the light. Blinds and accessories are not available. INSTALLATION PITCH* TWR Rigid Tunnel Ceiling mounted opaque diffuser Skylight Integral flashing Light transmittance of VELUX Sun Tunnels depends on parameters such as sky conditions (cloudy/sunny), direction of sunlight, orientation and length of Sun Tunnel. VELUX Sun Tunnels in this chart have been tested with a 1 metre shaft, on a 15°roof pitch in summer, at noon on a sunny day using a photometer. (TWR rigid tunnel emits 440 lumens when measured on a cloudy winter’s day). ^ The graph features 60% of total lumen value for these light sources – allowing for light absorption when mounted in a lamp or fixture, (Lumen values represent an average for Australian manufactured products). * Data source: VELUX Daylight laboratory – Greenwood, South Carolina, USA. TWF Flexible Tunnel Light comparison chart Technical information TWF FLEXIBLE TWR RIGID Roof Skylight – 4mm toughened glass Skylight frame dimension 470x470mm Integrated flashing & apron for tiled roofs Installation pitch 15°– 60° Shaft or tunnel diameter 350mm 1.95 m 2.0 m – Standard tunnel length Extension kit ZTR 014 (1.24m in length). Rigid only. Max tunnel length 6.0m Technical performance UV ray reduction Bushfire (BAL 12.5)* 7 year warranty U-value W/m 2 K – complete tunnel 99% 2.2 99% 2.2 – U-value calculated by VELUX internal testing per NFRC 100: 2001 test method. (EN ISO 9001 certified). Figures based on size 460mm (W) x 460mm (H). * Installation 18°-60°. TWR only. All figures quoted are for complete Sun Tunnel. 3.8
