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Flat light tunnel with rigid light transmitting tube SR_

Flat light tunnel with rigid light transmitting tube SR_


SR_  - with rigid light transmitting tube.
SR_-L -  with rigid light transmitting tube and illumination of the loft with natural light. The light tunnel fitted  in the ceiling ensures the comfortable use of the room.

Features of the new light tunnel design:

  • Approximately10% more U heat transfer co-efficient when compared to a version with a dome.

  • Integrated flashing – for faster installation of the light tunnel.

The SR_ light tunnel consists of: roofing element, three section light transmitting tube - SRM 2'-0", SRK elbow*, ceiling frame, prismatic diffuser and installation kit. The total length of sections connected in a straight line is 6'-10" (SR_ 550 – 5'-11").



  • RIGID LIGHT TRANSMITTING TUBE -  The light transmitting tube is made of aluminium, covered with a highly reflective silver based layer, characterized by a high efficiency light reflective factor of over 98% (compared to a new mirror reflective factor of 90-95%). Minimal light transmittance loss enables SR_ light tunnels with a tube length of up to 12m to be specified. When installing the light transmitting tube, there is no need to cut to size the sections as the tube design is telescopic. Simply push one section deeper inside the other in order to attain the proper tube length.

  • ROOFING ELEMENT -This consists of an aluminium frame into which 4mm thick toughened glass is bonded. The light transmitting tube is fitted to the inside profile of the frame. The roofing element is made of aluminium sheet metal or special organic glass (L – version with additional illumination of the loft) and is integrated with the flashing. The entire structure is finished in grey-brown RAL 7022 which matches perfectly all standard colours of roof covering materials.

  • CEILING FRAME - The new ceiling frame is made of organic glass and is equipped with a built-in light diffusing element. The cover is manufactured of high-impact polystyrene in a white opaque colour. Ceiling elements of flat light tunnels are more rounded in comparison to light tunnels with a dome.

  • ELBOW - The SRK elbow changes the angle of the light transmitting tube in the range of 0-65°. For the SR_ and SR_-L 550 light tunnel, the SRK elbow is only available as an option.
    Installation pitch: 15-60°.


*For the SR_ 550 and SR_-L 550 light tunnel, the SRK elbow available only as an option.

Cross-section of light tunnel SR_

light_tunnel SR FAKRO



Installation instruction:


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