greenstar_tileWAREMA external venetian blinds and other sunshading products are designed to:

  • Increase room comfort
  • Enhance daylight
  • Save energy

In the commercial arena several further benefits emerge

  • Reduction of  construction costs
  • Protection of façade elements

When the sun's rays strike glass a large proportion of the radiation passes through the glass and is absorbed into the room, heating up  furnishings and thermal mass objects such as concrete floors. The direct radiant effect of the sun and the heat radiating objects can create discomfort for the occupants. Even when it is cold outside (like a ski lodge on a day with clear skies) the radiant effect can be quite uncomfortable.

To manage room comfort effectively measures must be taken to reduce the amount of solar radiation penetrating the glass. Specialised glass is one approach. It reduces some solar radiation but also reduces daylight and for this reason creates a compromise. On an overcast winter’s day the tinted glass makes the interior dull. Highly tinted glass is aesthetically unpleasing and still not effective enough to protect occupants without airconditioning. Simpler types like “low E” glass have only a minor effect on heat gain.

External sunshading entirely overcomes these issues. Clear glazing can be used, since it is no longer the glass, but the sunshading that is reducing the solar radiation. Clear glass is inexpensive, maximises light in winter and gives a welcome feeling of connection to the outside. It is proven in many psycho awareness studies that this outside connection promotes a feeling of well-being. A good amount of natural daylight and intelligent control of solar radiation are the hallmarks of the new generation of “green” buildings, and increasingly form part of building codes and objectives of organisations.

It is common for external blinds to lower room temperatures by around 10 degrees. This saves greatly on air conditioning costs and depending on location in Australia may remove the need for air-conditioning altogether. Consider that whilst there are many methods of heating, electricity is the only common source of energy for air-conditioning. Air conditioning uses power heavily and the need for extra production of electricity, particularly in Australia with our reliance on coal is overall bad for the environment and unsustainable.

An ideal combination for Australia’s southern states is double glazing (highly effective in preventing winter heat loss) together with WAREMA external shading to lower heat gain. Buildings created with these measures enjoy a comfortable and stable temperature year round. In the north of Australia flexible openings and external shading are an ideal combination.

A product like WAREMA external venetian blinds provides complete control over solar gain. The blades are incrementally adjustable and when coupled with a WAREMA control system can track the path of the sun so that optimal interior conditions are always maintained. When exterior conditions are dull, a sun sensor registers that a threshold has been met and retracts the blind to maximise daylight.