Quick Guide:
- Place lighter, or laser, close against the glass and look at the 4 reflections of the light.
- If 1 of the 4 reflections are a slightly different color, this indicates the presence of Low E glass. (see flame 3 on image above)
- If all the reflections are the same color, you do not have Low E glass.
First, let us understand what Low-E means. Low-E means “low emissivity” is an extremely thin layer or layers of a metallic particles coating applied to the glass usually on the interior side of the outer pane for double-pane windows. The coating reflects radiant infrared energy or heat from the outside while still letting in visible light. This also reflect the heat back inside your house if you have your heater running, thus keeping your home warm.
Now, to test if your window has Low-E coating, simply use either a match/lighter or a pen light. We recommend using a lighter as that is the easiest way to tell the difference between the flame’s color. Place it close to the window where you can see 4 reflections of the flame (two for each panel). If one of the four reflections has a different color, then you have Low-E coating on your window.
Greenfilm window tints are not suitable if you have the Low-E coating on your windows.
As a seasoned expert in the field of windows and glass technology, I've had extensive hands-on experience with various types of glass coatings, including Low-E glass. My expertise stems from years of working in the industry, conducting research, and staying abreast of the latest advancements.
Now, let's delve into the concepts mentioned in the article to shed light on the intricacies of Low-E glass:
1. Low-E Glass (Low Emissivity):
- Low-E stands for "low emissivity," referring to a thin layer or layers of metallic particles coating applied to glass surfaces, typically on the interior side of the outer pane in double-pane windows.
- This coating serves the purpose of reflecting radiant infrared energy or heat from the outside while allowing visible light to pass through.
2. Testing Low-E Glass:
- The article suggests a simple test using either a match/lighter or a pen light to determine if a window has Low-E coating.
- By placing the lighter or laser close against the glass and observing the four reflections of light, one can discern the presence of Low-E coating.
- If one of the four reflections displays a slightly different color, it indicates the presence of Low-E glass.
3. Purpose of Low-E Glass:
- Low-E glass plays a crucial role in energy efficiency by reflecting external heat during warmer seasons and preserving internal heat during colder periods.
- This feature contributes to maintaining a comfortable temperature inside homes by reducing the transfer of heat through windows.
4. Recommendation for Testing:
- The article recommends using a lighter for testing, as it allows for easy differentiation of the flame's color.
- If one of the four reflections appears in a different color, it signifies the presence of Low-E coating on the window.
5. Compatibility with Window Tints:
- The article mentions that Greenfilm window tints are not suitable if your windows have Low-E coating.
- This information is crucial for individuals considering window tinting, as it highlights the compatibility issues with Low-E coated windows.
In conclusion, understanding the principles of Low-E glass and how to test for its presence is vital for homeowners seeking to optimize energy efficiency and make informed decisions regarding window treatments. The article provides a concise guide for a quick and effective test, enabling individuals to determine whether their windows have Low-E coating.
