Kelvin Value of Doors and Windows Explained

SHGC and U-Value of Windows and Doors for Optimal Energy Efficiency

Woman standing near glass window with sunlight showing energy efficiency through SHGC and U-Value

The Solar Heat Gain Coefficient (SHGC) and U-Factor(U-Value) are two important metrics used to assess the performance of windows in terms of energy efficiency. Let’s look at each of them: Solar Heat Gain Coefficient (SHGC) The SHGC is the fraction of solar radiation that enters a window and is released into the home as heat. … Read more

Kelvin (K) Value in Windows: What It Means (and What It Doesn’t)

Woman opening beige curtains near glass window with natural sunlight showing light temperature in modern home

When you’re selecting high‑performance doors and windows, you’ll often come across the term Kelvin (K) . But there’s a common misunderstanding: Kelvin is frequently mistaken for a measure of thermal performance. In reality, it serves a completely different purpose. Let’s clear up the confusion—and then focus on the numbers that actually matter for energy efficiency, … Read more