Diameter: 250mm (10″)
Max Recommended Length: 7.0m
Coverage: Up to 12sqm
Solarspot D-25 – giving you natural daylight.
The Solarspot D-25 is at least 50% brighter than the next best solar tube system in the 200-300mm sector.
The smallest system in the range yet it’s as bright as the best 350mm unit on the market. The Solarspot D-25 is perfect for most domestic situations and smaller commercial areas.
Full range of Solarspot adjustable angles available.
Solarspot D-25, 250mm diameter TDS
At 250mm (10 inches) in diameter, the Solarspot D-25 it’s small enough to fit through virtually any joist gaps whilst providing enough light to illuminate areas up to 12 square metres. Independently testing shows the D-25 to be head and shoulders above any similar systems in the 200-300mm diameter sector giving at least 50% more light than systems like the Solatube 160DS or Lightway LT230. And compared with a 350mm flexible sun tunnel from a company like Velux you could expect around 10 times the amount of light.
The D-25 is suitable from virtually every roof type and can be supplied with the full range of Solarspot accessories including adjustable angles up to 30, 60 or 90 degrees, as well as integrated light systems and dimmer units.
A Solarspot D-25 is the best way to bring daylight into your windowless bathroom, landing, bungalow hallway or en-suite. See our residential price list.
The Solarspot D-25 lights spaces up to 12sqm and is ideal for:
- Bathrooms and en-suites
- Corridors and hallways
- Landings and stairwells
- Cloak rooms and shower rooms
- Dressing rooms and walk-in wardrobes
Solarspot D-25 components:
- Non-yellowing dome with RIR™ light capture lenses
- Convas anti-condensation lens for increase thermal efficiency©
- Extension tubes available: 200, 300, 400, 600 and 1200mm lengths
- Flashings suitable for all virtually all roof types
- Adjustable angle adaptors available: 0-30°, 0-60°, 0-90°
- Range of circular and square diffusers available for solid and open-ceilings
Solarspot Flat Roof Systems
The Solarspot spun aluminium flashing makes it perfect for any flat roof application. The rigid strong, flashing is perfect for GRP or single-ply roofs, and heat-resistant for any hot-process membrane system.
The unit is also a great option for green roofs providing a more aesthetically sympathetic solution than a curb-mount option.
Solarspot Pitched Roof Systems
The Solarspot ABS flashing is available in either parallel or angled options to enable the perfect solution for any pitched roof.
The main flashing chassis can be heat-moulded to allow it to be formed over the profile of the roof tiles, and the sleeve adhesive flexible weathering-strip on the lower edge holds the flashing in-place, whatever the elements throw at it.
Frequently Asked Questions
What should I look for when comparing sun tunnel performance?
Independent, comparative testing using internationally recognised methodology – it’s as simple as that. And the thing to look out for is an efficiency figure. If a manufacturer is confident about the performance of their system they will quote an efficiency figure and then show how this compares to competitor products. Solarspot are the only manufacture of solar tube type systems to publicly publish these figures and that is because we know that, size-for-size, no one else will give you more daylight through a solar tube.
What does ‘efficiency’ mean, and how does it affect the light delivery?
Efficiency is a measure of the ability of the solar tube to deliver light from the top (dome) to the bottom (diffuser), regardless of the time of day or time or year. To suggest otherwise is like saying your car is faster on a Thursday or gives better MPG when there’s a ‘Y’ in the month. This is just a pile of bunkum put out by manufactures like Solatube trying to muddy the water. Read the independent BRE test summary of Solarspot D-38 and Solatube 290DS
Do I need a BBA certificate?
Unless you are a developer that wants to include the solar tube in the 10-year NHBC cover then the answer is no. For the vast majority of customers retro fitting into their homes, fitting in their own self-build project, retro fitting into an office as part of a refurb or a new commercial development, you don’t need a BBA certificate. The BBA certificate is no guarantee of performance. In fact the only other sun pipe to hold a BBA certificate was the Sola Skylights Skytunnel, the worst performing solar tube ever tested by the BRE. Read the BRE test summary of flexible sun pipes