When discussing windows, the conversation often revolves around the choice between PVC or aluminum, with some advocating for wood. Rarely do people consider what type of glass to install in new windows. However, Low E, or low-emissivity, glass has become a hot topic lately. What are the advantages of such glass, and how does it work?
How Low E Glass Functions
Low E glass consists of two or three glass panels with special coatings on the inner surface and a gas fill sandwiched between the glass. The installation cost of Low E glass is higher, but these windows offer certain advantages.
Advantages of Low E Glass
- Heat Regulation: A thin invisible metal coating on the inner surface of the glass blocks the passage of infrared (IR) and ultraviolet (UV) rays from the sun’s light spectrum. This reduces heat transfer into the room, leading to lower cooling costs, especially for larger glazed surfaces common in modern buildings.
- UV Protection: Low E glass significantly reduces UV rays harmful to human health, minimizing the fading of furniture and floors due to strong sunlight. Quality Low E glass allows only half as much UV radiation to pass through compared to regular glass.
Installation Considerations
- Orientation: Depending on the climate, the coating placement varies. For better summer protection, the Low E coating is applied on the inner surface of the external glass. For winter insulation, it’s best to apply the Low E film on the external surface of the internal glass.
- Gas Fill: Noble gases, primarily argon, are often used between glass panels for better thermal insulation and to prevent condensation. Argon, being inert, doesn’t react with the metal coating, unlike air, which contains moisture.
Choosing Between Double and Triple Low E Glass
- Insulation: Triple-pane glass offers better insulation and resistance to condensation compared to double-pane glass. However, whether you need it depends on your specific requirements. For energy-efficient or passive houses, triple-pane glass is the ideal choice. Otherwise, the investment may not justify the difference in performance for standard homes or apartments.
- Practicality: Triple-pane glass is heavier and less practical for daily handling. However, it can provide better sound insulation, making it worthwhile for windows facing noisy streets or highways.
Pricing Considerations
- Varied Costs: Prices vary significantly depending on the manufacturer, profile type, hardware quality, and glass type. While the pricing equation is complex, understanding what you truly need versus marketing gimmicks is essential when investing in window glass.
In conclusion, selecting the right type of glass for your windows requires careful consideration of your specific needs and budget constraints, ensuring a balance between performance, cost-effectiveness, and practicality. Always consult a reputable manufacturer with a proven track record and product warranty to ensure quality and durability.
Foto: Freepik