Beware of flexible fiends

Do flexible sun tunnels actually work? No is the answer.Beware the flexible fiend!

When choosing a Tubular Daylight System (TDS) you will find a number of different suppliers of systems. These systems fall into two different categories; rigid and flexible. Rigid systems, such as Solarspot®, use hi-tech, highly reflective (in our case Vegalux® 99.7% – the most reflective material in the world) to transfer the light – flexible systems use a foil air-conditioning style ducting to try and perform the same task.

So how do you choose which system to buy and what difference will it make to you or the amount of natural light that you will get into your home?

The answer is simple. A Solarspot® TDS will transfer at least 10 times more light than a flexible system (in a typical installation). But don’t take our word for it. In recent tests carried out by the Building Research Establishment (BRE) systems, a TDS with a reflective value of more that 99% – very close to the specular reflectivity (99.7%) of our Vegalux material – was shown to out-perform the best flexible systems by around 10 times. The tests were based on the system being located on a south facing roof. If your were to consider the difference when location on a north, east or west facing roof, a SolarSpot® D-38 TDS could be delivering around 10 times more light and potentially a lot more*.

So why does anyone buy a flexible system? Well the simple answer is that they are cheap. However, when it comes to installation, the cost is the same. So when you consider that to achieve the same light levels as one Solarspot TDS you’d need at least 10 flexible systems it’s immediately apparent that the Solarspot is the best value solution.

*depending on time of day.