Argon and Krypton gas-filled air space - Argon gas, used between panes, is often an option offered by top window manufacturers. It enhances thermal performance without getting in the way of the view. Krypton is another invisible gas that offers higher levels of thermal protection.
U-Factor - U-factor is a measure of heat lost and indicates how well a window, skylight or patio door can withstand heat transfer. The lower the u-factor value, the higher the insulating performance of a building element. U-factors on windows generally range from 0.25 to 1.25.
Solar Heat Gain Coefficient (SHGC) - SHGC measures the amount of solar radiation transmitted through a window, expressed as a number between 0 and 1. The lower the SHGC, the less solar heat the window transmits.
Milgard Energy Performance Options
||Your energy efficient windows could include one or more of the following features based on your climate.
|ENERGY STAR v6 Northern
||SunCoat® or SunCoatMAX® Low-e coatings
|ENERGY STAR v6 North-Central
|ENERGY STAR v6 South-Central
||Argon or Krypton gas-filled
ENERGY STAR v6 Southern