The Reduction In Heat Loss From Film

Heat loss through glass with applied Window Film

With the use of ordinary glass in a building there is relatively little resistance to loss of heat generated inside a building. Glass is known as a bad insulator of heat from indoors.

Architects utilize double glazing in cold climate countries to reduce heat loss through windows. Heating buildings is a major cause and contributor to carbon dioxide emission because much of the generated precious heat is allowed to fly through the windows. Heating plants burn fossil fuels and buildings without proper insulation waste energy.

Heat loss is quantified by transmittance or “U” value. The “U” value is the rate of heat loss per square metre. Heat is lost through internal glass surfaces in the room when the glass surfaces are at a lower temperature than the internal air temperature and the room surface temperature.

Low e (low emissivity) window film is known as “summer winter window film” and is constructed in a different way to regular window film. Recent technology has improved and in this modern world one can get a film that keeps in 85% heat for very cold climates. Although these summer winter films are more expensive than regular films, in the desired climate they are sure worth the expense. These films also keep out 80% of the heat, thus substantially reducing costs in the running of air conditioners.

With our wonderful climate in South Africa consumers are more concerned with keeping heat out of buildings. However with the “going green” mind set this “summer winter film” could become more popular as time moves on.

Indoor heat is also generated by body temperature, artificial lighting, furniture and electronic equipment, besides heating equipment. The larger the window area the more heat one loses.

With the price of electricity going up in leaps and bounds and the commitment by large companies to reduce carbon emission this product will play an important role in reducing the use of fossil fuels. Our environment will benefit from companies installing this new “summer winter” film. This product will also reduce the amount of ultra violet coming into the windows by 99% and saving furniture and carpets from sun damage.

Window films from Klingshield turn float glass into safety glass. Should there be an explosion the film will hold the glass together, thereby reducing the risk of dangerous flying glass.

For further details on our complete range of window film product read our articles page on our web site