NFRC Information

Park-Vue ™ patio doors have been performance tested and rated, in compliance with the national system established by the NFRC (National Fenestration Rating Council). These ratings enable consumers to compare the energy efficiency of various patio door and window products.

Ratings appearing on the NFRC label include:

U Factor, or how well the unit keeps heat inside the home. The lower the U Factor, the better the energy performance. (NOTE: R Factor = 1 / U Factor)
Solar Heat Gain Coefficient, or how well the door keeps solar heat out of the home. The lower the SHGC, the less solar heat the unit will transmit.
Visible Light Transmittance, or the percentage of visible light that comes through the door.
The ratings below appear on Park-Vue™ NFRC labels:
assumes no internal grids or breather tubes, standard thickness glass

Unit Type	U Factor	Solar Heat Gain Coefficient	Visible Light Transmittance
Primed Slide
LowE Argon Filled	.29	.30	.57
Clear Insul Air Filled	.47	.63	.67
Clad Slide
LowE Argon Filled	.31	.30	.57
Clear Insul Air Filled	.49	.63	.67
French Riviera Clad Slide
LowE Argon Filled	.32	.25	.47
Clear Insul Air Filled	.47	.53	.55
Wood InSwing
LowE Argon Filled	.31	.22	.42
Clear Insul Air Filled	.44	.47	.49
Clad InSwing
LowE Argon Filled	.32	.22	.41
Clear Insul Air Filled	.44	.46	.49