Low-emissivity or Low-E windows come with a coating, which has evolved over the years. They are quickly gaining traction over tinted glass. However, not all coatings are equal. They mostly differ based on how well they control glare and keep the house warm in winter and cool in summer.
The top three Low-E ratings include Low-E 240, Low-E 270, and Low-E 366.
Low-E glass emits energy in the form of thermal radiation. It utilizes a transparent, thin coat reflecting heat, allowing natural light to enter your house. Simply put, the temperature inside your house will remain consistent while blocking exterior temperature.
Now that you know what Low-E glass is, let’s take a look at its common types:
Low-E 240
For most homeowners, reducing glass glare is a top priority. If this factor is on your list, too, Low-E 240 glass is the best choice. Not only is it great at reducing glare, but also the amount of light coming into your house.
Low-E 240 helps maintain your room’s thermal comfort, blocks solar heat, and keeps the inside temperature warm in winter.
Remember: Low-E 240 is not a tint. It does not absorb sunlight. It contains a coating instead, which gives a consistent appearance regardless of the glass’s thickness.
Low-E 270
Low-E 270 is a solar-tuned glass that offers comfort year-round. It reduces solar heat by more than 50% compared to ordinary glass. Clear glass outperforms tinted glass and is the best house partner in sunny climates.
Low-E 270, too, is coated and lets in minimal light during winter to keep your house warm.
Low-E 366
Compared to Low-E 240 and Low-E 270, Low-E 366 is the premium performing glass. It offers great comfort and the biggest energy savings. This glass also outperforms tinted glass.
Low-E 366 offers high visibility and solar control. It is Energy Star compliant and can be used with double-pane windows. The glass blocks 95% of UV rays and has a low solar heat gain coefficient (SHGC). Though the glass’s air leakage is very low, it might become problematic if the window is not installed properly. This is why we recommend hiring a professional for this job.
ClimaGuard 55/27
ClimaGuard 55/27 glass also has a coating and is specially made for sun-drenched rooms. It’s the most common energy-saving solution for mountain and waterfront-view homes. However, they add glare and heat.
It blocks twice the amount of solar heat compared to ordinary glass and keeps the interior cool, even on the sunniest days. Moreover, it minimizes glare and does not darken rooms.
In conclusion, if you have the budget and are looking for the best Low-E glass, Low-E 366 is the right option for you. For your lake house, we suggest going with ClimaGuard 55/27.
Visit the Sky Building Materials website and browse their huge range of glass and mirror products. They also offer other glass types, including insulated and frameless glass. To request a custom quote for your house, click here. For more information about our glass supplies, call on 972-807-9616.