Introduction
Low-e windows have been increasingly used in buildings to keep the interior warm in winter and cool in summer. However, a rare but dangerous side effect can put neighboring properties at risk.
What are Low-e Windows?
Low-e windows are coated with a thin layer of metal or metal oxide that lets visible light through but acts like a mirror in the infrared. Heat from the interior is reflected back in, retaining warmth in winter, while unwanted solar radiation is repelled in summer.
The Magnifying Glass Effect
When low-e windows are used in curved glass, they can create a magnifying glass effect, concentrating solar radiation on a specific point. This can cause extremely high temperatures, capable of igniting flammable materials such as dry leaves or paper.
Risks and Consequences
While the risk of fire is low, it is essential that building owners and architects are aware of this side effect and take measures to mitigate it. This can include installing protective screens or choosing fire-resistant construction materials.
Conclusion
Low-e windows are a useful green technology for reducing the need for heating and cooling, but it is crucial to be aware of the potential risks. By taking measures to mitigate these risks, we can ensure that these windows are a safe and sustainable choice for buildings.
Source / Reference
Source: The Guardian Environment