If you’ve recently upgraded to energy-efficient windows, you might notice a faint green tint in the glass. This subtle change is often due to Low-E (low emissivity) glass technology, which has become a popular feature in modern replacement windows for its energy-saving benefits. While it might look surprising at first, this greenish hue actually signifies that your windows are working to keep your home more comfortable.
What is Low-E Glass?
Low-E glass is specially coated to reflect radiant heat, helping regulate indoor temperatures. In summer, it reflects outdoor heat, keeping interiors cooler, and in winter, it holds heat inside, reducing energy bills year-round. These coatings are microscopically thin metallic layers that alter the light passing through, leading to that greenish hue that some homeowners notice.
Why the Green Tint?
The green tint you’re seeing is due to the Low-E coating on the glass, combined with the natural color of the glass itself. Most clear glass has a slight greenish tint due to iron content, and the Low-E coating can enhance this effect. It’s a sign that your glass is actively filtering sunlight in a way that reduces UV exposure and improves insulation.
The Benefits Outweigh the Tint
While it may take a bit of getting used to, Low-E glass offers numerous benefits:
Energy Efficiency: The coating helps reduce the need for heating and cooling, saving you money.
UV Protection: Low-E glass blocks a significant portion of UV rays, protecting furnishings, floors, and artwork from fading.
Comfort Control: It minimizes temperature swings near windows, creating a more comfortable living space.
So, if your new windows have a slight green tint, rest assured: it’s a visual indicator of a high-performing product designed to enhance your home’s energy efficiency.
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