Intura SunTube light tunnels – innovative daylight systems

A light tunnel carries natural light from a roof or façade to an interior. SunTube combines an exterior dome, rigid reflective tube and ceiling diffuser.

Yes. These are common names for the same type of daylight system. SunTube is Intura’s product name.

Yes. It also transports diffuse daylight, although output varies with weather, season, orientation, shade, tube length, bends and diameter.

ST25 and ST35 have crystal-glass domes that do not yellow under UV exposure. ST55 uses a PMMA dome.

Bathrooms, WCs, halls, landings, kitchens, utility rooms, bedrooms and workspaces, as well as offices, schools, care buildings, workshops and warehouses.

As a guide: ST25 up to about 9 m², ST35 about 13–16 m² and ST55 about 25–30 m². Route length and room geometry may justify a larger or multiple systems.

There is no fixed lumen figure. Under favourable conditions ST35 can provide roughly 900–1,300 lux in summer and 400–700 lux in winter at 1.5 metres below the diffuser. These are indicative values.

Yes. Separate systems are available for flat roofs, pitched roofs and horizontal façade routes. Select the version that matches the building envelope.

EcoPower combines 14 cm PIR insulation, Rd 6.30 m²K/W, with an airtight glazed closure. HR++ uses double glass, Ug 1.1, and HR+++ triple glass, Ug 0.6 W/m²K.

Any penetration must be insulated and airtight. EcoPower reduces calculated heat transfer and raises internal surface temperatures, helping to limit condensation risk. Indoor humidity and ventilation also matter.

Exterior dome, insulated aluminium upstand or wall box, one 60 cm reflective tube, EasyClick diffuser and installation materials. Exact contents depend on the version.

Extra 60 cm sections can form a route up to about 6 metres. A short straight route normally gives more light than a long route with several bends.

Yes. Adjustable 0–45° bends can avoid joists or services. Minimise the number and angle of bends because every change in direction reduces output.

Potentially, where the route and building permit it. Long or complex routes require checks of diameter, structure, fire safety and penetrations.

Yes. An optional dimmer reduces daylight. LuxBlend adds artificial light at the same ceiling position. Plan power and controls before installation.

Roof type, covering, exterior-unit position, full distance to the finished ceiling, joists, pipes and cables, then diameter, extensions, bends, EcoPower, dimmer and LuxBlend.

Installation is best completed by an experienced roofer or contractor. Watertightness, airtightness, insulation and safe work at height are essential.

See the assembly instructions. Intura can also provide technical project support.

That depends on the building, location and work. Listed buildings, protected areas, structural alterations and fire-safety requirements may require assessment or consent.

Yes. Complete kits, EcoPower elements, extension tubes, bends and accessories are available online. Check the diameter and building-envelope version first.

Many standard products are stocked or available quickly. Lead time varies by product, configuration, quantity and destination. The product page and order confirmation are decisive.

Yes. Send the roof type, covering, total route length, preferred diameter and clear photographs or a section drawing for advice on the kit, EcoPower, extensions and bends.