What do Labels on Replacement Windows Mean? Tips on Choosing Energy Efficient Windows in Springfield, MO

If you’re shopping for replacement windows for a home in Springfield, or any other nearby area in Missouri, you’ve no doubt run across windows bearing a label with lots of numbers and phrases including U-factors and R-Values. Those labels contain important information that could affect your purchasing decision, which means it’s a good idea to understand what they mean.

Here’s a list of terms you will most likely see on replacement windows, and an explanation of what they mean:

• U-factor – This number tells you how well a window prevents heat from escaping. In cooler climates, you want to look for a U-factor with a low rating.
• R-Values – The opposite of U-factor, R-values rate the level of heat resistance against heat transfer – the higher the number, the higher the insulating value.
• Solar Heat Gain Coefficient – This number tells you how much heat from the sun the window allows inside your home. In warm climates, you want a low SHGC rating between 0-1.
• Low-E Coating – This indicates that the replacement windows are coated with metallic oxides that provide extra protection from the solar heat.
• Gas Fillings – Argon and Krypton gas is used between double-and triple-paned windows to add another layer of insulation.
• Air Leakage – This value lets you know how much outside air can leak in. Look for a number closer to 0.1.
• Visible Transmittance – The closer this rating is to 1, the more daylight these replacement windows will allow in.
• Condensation Resistance – This number tells you how good the window is at resisting condensation. The closer the number is to 100, the better it will be at resisting condensation.

To learn more about replacement windows and what their labels mean, turn to the experts at Modern Exteriors. We will be happy to help you choose the perfect window products for your home in Springfield, MO.