The NFRC label provides standardized information about a product’s energy efficiency, allowing homeowners to understand the specifics and compare. Here’s a breakdown of the five main factors on the NFRC label:
1. U-Factor—The insulating value of the entire window system (glass, frame, etc). Lower numbers mean better insulating value, with values generally ranging from 0.25 to 1.25. (REMEMBER: LOWER = BETTER INSULATION)
2. Solar Heat Gain Coefficient (SHGC)—The amount of solar heat passing through the glass. Lower numbers mean the glass is preventing heat from the sun into your home, measured on a scale of 0 to 1. (REMEMBER: LOWER = COOLER)
3. Visible Transmittance—The amount of light passing through the glass. Higher numbers mean more light comes through the glass into your home, measured on a scale of 0 to 1. (REMEMBER: LOWER = LESS LIGHT)
4. Air Infiltration (or Air Leakage)—How much air is entering or escaping through the window system. Lower numbers mean less air is entering or escaping. (REMEMBER: LOWER = LESS LEAKAGE/ TIGHTER SEAL)
5. Condensation Resistance—The amount of moisture it takes for condensation to appear on the glass when exposed to extreme temperature changes. Higher numbers indicate better resistance to condensation, measured on a scale of 0 to 100. (REMEMBER: HIGHER = LESS CONDENSATION)
WESTECK Windows' Thermal values reach Passive House and Net Zero targets.