Protection from direct sunlight –The system should be adjustable to ensure that direct sunlight does not enter the building.

Control of glare –This is of particular importance in offices where computer screens are used.

Control of solar gain –Installing the shading system externally can reduce solar gain by up to 95%, reducing, or even potentially eliminating, the need for air conditioning.

Maximisation of natural daylight –When external light levels are low, the shading system should be able to be retracted, to make the best use of the natural daylight that is available.

Protection from the cold –The shading system should be able to help insulate the building by reducing the amount of night cooling during winter months.

Communication – The system should allow a view to the exterior, ensuring that the building occupants do not feel cut off from the outside world and their surroundings.