When choosing windows for your home, the Solar Heat Gain Coefficient (SHGC) is a crucial factor to consider. SHGC measures how much heat from direct sunlight passes through your windows, affecting indoor temperatures throughout the year.
During summer, windows with a high SHGC can bring in excess heat, making your home uncomfortably warm and increasing cooling costs. Conversely, in winter, a higher SHGC can be beneficial by naturally warming your home, reducing heating expenses without added energy consumption.
The SHGC is primarily influenced by the glass type.
- Tinted glass and applied films can significantly reduce SHGC, helping to control indoor temperatures more effectively.
- Low-emissivity (Low-E) glass is effective in managing SHGC. Low-E glass has a special coating that reflects heat while still allowing natural light to pass through, helping to regulate indoor temperatures efficiently.
- Vacuum glazing that combines Low-E glass, on the other hand, provides superior insulation by minimising heat transfer, making it an excellent choice for energy-efficient homes.
When selecting glass for windows and doors, it is essential to consider factors like orientation, location, and house design to achieve the best energy-efficient results. Climate also plays a key role in determining the ideal SHGC. In cooler climates, a higher SHGC can maximise solar heat gain and reduce heating costs, while in hotter climates, a lower SHGC is preferable to minimise unwanted heat buildup.
For older homes in cooler climates that lack heat sinks, such as concrete floors and passive design elements, it becomes more important to let heat in to warm the home. Without modern-designed thermal mass features to retain and distribute heat, windows with a higher SHGC can be a crucial source of warmth for older homes, helping to naturally heat rooms and reduce reliance on active heating.
The range of thin glass products Sealasash offers for installation to existing wooden sashes includes:
While SHGC is an important factor to consider for upgrading glass, also make sure that your investigate the thermal insulating qualities of the glass, known as the U-Value (click here to understand more about U-Value). Modern high performance glass such as Glavenir vacuum glazing by Panasonic, provides a number of benefits over single-pane Low E. By carefully selecting the right window glazing and design, home owners can enhance comfort, reduce energy bills, and create a more sustainable living space. Stay tuned for more enery-saving tips and expert advice!
