5 factors affecting window energy efficiency ratings

If you’ve just decided to go for window replacement, you most likely heard about window energy efficiency ratings. These are key indicators about how energy-efficient your home will be after the installation of your new windows. Our experts say that spending more on energy-efficient windows represents a long-term investment that will aid you in saving both money and energy. Next, we share our insights on window replacement and energy efficiency ratings.

Window replacement and energy efficiency ratings

Energy-efficient ratings represent the measurement of a window’s energy efficiency. These are established after thorough testing that certifies windows, doors, and skylights have a specific performance rating. When you search for window replacement, you can check the label on the product. It must showcase a clear energy-performance label to guide you during the shopping process.

The factors affecting window energy efficiency ratings

The energy efficiency of replacement windows can be influenced by numerous factors. But this aspect is essential for your home since it can make a huge difference in the long-term results. Here are the 5 factors affecting window energy efficiency ratings.

#1 U-factor

The U-factor indicates how well your window is able to prevent heat leaks during winter. This resistance to heat flow is a key aspect of new windows insulation. The higher the U-factor, the better the insulation. This ranges between 0.15 and 1.20, but the lower the value, the more effective your new windows will be at keeping heat inside.

#2 Solar Heat Gain Coefficient

Another factor that influences window replacement energy efficiency ratings is the solar heat gain coefficient. The SHGC refers to the amount of solar radiation a window will let inside. It ranges between 0 and 1. The lower the value, the less heat will pass through the glass.

#3 Visible Transmittance

Visible transmittance, as the name suggests, measures the amount of light a window lets inside your home. It ranges from 0 to 1, while the higher the number, the more light will be allowed inside. VT numbers can make a lot of difference when it comes to filling your home with natural light.

#4 Air leakage

Window replacement solutions must insulate and prevent air leakage at all times. This measurement ranges between 0.1 and 0.3, while the lowest value will be the most efficient in preventing air leaks. Keep in mind that due to normal wear and tear, this number can modify. Materials expand or become warped, which is why air may be able to leak inside when your windows age.

#5 Condensation

The condensation factor refers to the quantity of moisture a window allows to set up at the surface. Condensation resistance ranges between 1 and 100. The lowest number tells you that the most condensation will be allowed to build upon your windows. Still, this is an optional rating you shouldn’t ignore. Too much moisture encourages mold and discoloration.

The takeaway

These are the 5 factors affecting window energy efficiency ratings. If you’re unsure which the best choice for your home is, you should discuss it with a window replacement expert. In this way, you’ll get access to useful information that will help you make an informed decision for your home.