Brunette Girl On The Couch At The Window

• Visible transmittance (VT) (ratio of transmitted visible light divided by incident visible light)
• Air Leakage (AL) (Measured in cubic foot per minute per linear foot of crack between sash and frame)
• Condensation Resistance (CR) (Measured between 1 and 100. The higher the number, the higher the resistance of the formation of condensation.)