“Why use Low-E glass?” This is a very important and good question. Low-E glass is an indispensable core material in modern energy-efficient buildings.
Here are the main reasons and significant advantages of using Low-E glass:
1. Exceptional energy-saving performance (core advantage)
This is the fundamental reason for using Low-E glass. It works by coating the glass surface with an extremely thin layer of metal or metal oxide film, which has low emissivity (Low Emissivity) properties.
Winter insulation: Heat emitted by indoor heating systems, human bodies, and appliances (far-infrared thermal radiation) is reflected back into the room by this coating, reducing heat loss through the glass and maintaining indoor warmth while lowering heating costs.
Summer heat insulation: It effectively blocks outdoor solar heat radiation (primarily near-infrared rays) from entering the room, thereby reducing air conditioning cooling loads and saving energy consumption.
2. Significant improvement in comfort
Reduces the “cold radiation” sensation: In winter, standing near ordinary single-pane or double-pane windows can cause a noticeable chill (due to the low temperature of the inner surface of the glass). Low-E glass increases the temperature of the inner surface, eliminating the uncomfortable cold sensation when standing near the window and enhancing thermal comfort.
Temperature difference control: Reduces temperature differences between different areas indoors, preventing parts of the room from becoming too cold or too hot.
3. Excellent light transmission and UV protection
High light transmission: While blocking infrared rays, Low-E glass maintains a high transmission rate for visible light, ensuring ample natural lighting indoors, keeping the space bright and open, and reducing the need for artificial lighting during the day.
UV protection: It effectively blocks UV rays (up to 90% or more), protecting indoor furniture, carpets, artwork, curtains, and other items from fading and aging due to UV exposure.
4. Environmental contributions
By significantly reducing a building's heating and cooling energy consumption, it decreases the burning of fossil fuels for power generation and heating, thereby indirectly reducing emissions of greenhouse gases such as carbon dioxide (CO₂) and sulfur dioxide (SO₂), as well as pollutants, aligning with the requirements of green building and sustainable development.
The fundamental reason for using Low-E glass is to achieve energy efficiency, environmental protection, and enhanced living comfort. It’s like putting a “smart scarf” around your windows:
In winter, it keeps heat inside your home.
In summer, it keeps heat out.
Year-round, it lets light in while protecting your home and health.
Although Low-E glass is more expensive than ordinary glass, it is a highly worthwhile investment when considering the long-term energy savings, improved comfort, and increased property value it provides. Currently, it has become the preferred product for new energy-efficient buildings and window renovations.