Electricity is wasted in so many ways in our apartments and homes. People often leave lights on in empty rooms and also the air-conditioning systems used are inefficient. These are a couple of examples of how electricity is wasted in South Africa. Window tinting film is a cost-effective solution to this problem.
The amount of energy that is required to cool down rooms or spaces that are heated by sunlight is enormous. On an average, about one-third or about 30% of a buildings cooling load is the consequence of solar heat through the windows. Yet this source is undermined. Consider window tinting.
It’s true that a window is essential for an outside view and it provides lighting that reduces the need for artificial lighting. But when the amount of daylight is increasing it also means more power for cooling to make the room comfortable.
A solution to this dilemma is the application of window tinting film. Window film is very easy to use and applied inside section of a window. It absorbs and reflects the solar heat. In the process, it reduces the need for cooling and also helps to maintain a comfortable temperature.
Due to the directional orientation relative to the sun, some part of buildings can be categorized as “Hot Spots” in Johannesburg, Pretoria, Durban and Western Cape which receives more heat than the other parts. It can create some issues for the air-conditioning system while maintaining the occupant’s comfort in a facility.
Some buildings have large glass areas which need additional cooling for maintaining comfort. To maintain uniform and comfortable cooling, reducing the heat gain through the windows is essential.
How the Window Tinting Film works
Home window tinting film focuses on blocking solar radiation. There are basically three components of solar radiation or solar energy. 53 per cent of the solar spectrum is near infrared, 44 per cent is visible light and 3 per cent is ultraviolet. Most of the sun rays are transmitted through the glass and a very little portion is absorbed and reflected.
A pane of clear glass can reflect 6 per cent, absorb 5 per cent and rest is transmitted. These transmitted solar energies enter a room or space and combine with the ambient heat which is already there due to people, computers and re-radiated heat absorbed by furniture and carpeting. The excess heat makes the environment uncomfortable particularly for people near the windows.
Installing Solar Control Window Tinting Film
The constituting materials of window tinting film enable it to absorb and reflect the solar energy. Window tinting films are made of metallic coating which includes aluminium, stainless steel, silver or a combination of these. Most part of the absorbed radiations is re-radiated outward and some are re-radiated into the building in Johannesburg, Pretoria, Durban and Western Cape.
The performance of home window tinting film can be measured by solar heat gain coefficient. One can easily find the amount of energy transmitted through the glass and the amount that is absorbed and re-radiated by solar film. Some window tinting film can reject almost 80% of the solar heat. Usually, this efficiency depends on the materials used.
One important thing to remember is the solar heat rejection and the near infra-red rejection is a completely different thing. Solar heat rejection is the measure of all the solar heat radiation that is rejected while near infra-red rejection is only the amount of that particular frequency which is rejected by window film.
Reduce solar heat gain with Window Film
Window tinting film can really reduce the heat gain and it will save your money. The electricity bill for cooling will be reduced by quite a large extent. Another major fact is that there are different rates and charges for higher demand peak or highest monthly rate of use in Johannesburg, Pretoria, Durban and Western Cape.
With the help of window tinting film, electricity consumption can be reduced to some significant extent during the peak and charges for peak demand can be saved along with the electricity bill. For its ability to save energy it is recognized as one of the modern energy saving techniques along with ceiling insulation.
These characteristics have attracted so many large utility companies. They offer a large number of incentives and repayments for the installation of the window tinting films. Many energy service companies are also using window films in order to achieve a much higher energy efficiency rating.
Advantages of using Window Tinting Films
Saving energy and cost by reduction of heat gain is not the only advantage of window tinting films. Most of the window films reject almost 95% to 98% UV rays. These UV rays do not increase the heat. However, they can harm the people and other materials.
Window films protect people from the dangerous effects of UV light. Also, the furniture and other building materials are saved from UV rays. Using car window tinting also prevents the UV rays from entering your vehicle while driving.
Visible light is sometimes annoying especially when they are reflected in smooth or glazing surfaces. The amount of visible light entering into a facility is also reduced by window tinting film. Depending on the materials used and the type of films, a significant quantity of visible light can be blocked. No need to wear shades in the house to prevent annoying visible lights.
Finding the right film in Johannesburg, Pretoria, Durban and Western Cape
Choosing the right film depends on the types of windows and energy needs of a building. For example, if a building is designed to be lighted by daylight, they can choose the window film which allows passing visible light and rejects infra-red lights. The amount of visible light transmission usually ranges between 35 to 70 per cent. These films are known as spectrally selective films.
Another important thing is the type of glass that is used in the window of a facility. There are different glasses in Johannesburg, Pretoria, Durban and Western Cape and for those different types of windows, films are also available. So it is better to know the glass type before applying window tinting film.
Security and smash and grab window tinting films
Safety and security of the occupants are one big concern for everyone. Manufacturers are aware of this and they are producing special smash and grab tinting which the main purpose is maintaining security and safety. These films stop broken pieces of glass from flying during some disastrous situation like bombing, hurricanes, earthquakes etc. They also reflect solar heat to some extent.
The thickness of these home window tinting films varies. Normally 4 to 14 millimetres is the range of thickness. The installation process of these films is different too and it is known as anchoring.
There are two types of installation
Wet Glazed Installation: This process involves removing the rubber around the window. After that, the space between window and film is filled with structural silicone sealant.
Mechanical Attachment: In this process the film is overlapped around the edges of the window. Bolts are attached with an internal film after that.