What is a good U-factor?
What is a good U-factor? In a cold climate a good U-factor for a window is between 0.17 and 0.39. (That's between R-6 and R-2.5). Lower is better with U-factor--the opposite of R-value, when higher is better. How do you calculate shade coefficient? The shading coefficient is calculated by the equation SC = SHGC / 0.86. For example, for glazing with a SHGC of 0.6, we have 0.6 / 0.86 = 0.69, so the shading coefficient (SC) is 0.69. What is SHGC and U-value? To comply with energy reports U values must be Lower than or equal to that specified...