Another rule of thumb which is observed by designers is that 'if you can't see the sky the daylight level is inadequate'. The result is tall windows to give maximum daylight penetration. This carries the attendant risk of glare unless workstations are properly positioned in relation to the window. In most cases this will mean desks at right angles to the external wall and the VDU viewing axis parallel to the window plane.

One option is to resort to automatic blinds. Occupiers sometimes complain that the spontaneous action of the blind is an irritant and represents a denial of individual choice. Local manual override is the preferred answer.

Recent developments in glass technology referred to earlier in terms of electrochromic glass offer solutions to these problems, especially if it can be controlled on an individual pane basis.

Another problem that occurs is that lighting and blinds controls are not co-ordinated. Lights tend to stay on regardless of the position of the blinds. The operation of externally positioned blinds can be frustrated by adverse weather conditions, especially high winds.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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