Patriot 2800 Series Double Hung Performance Data

	U Value	R Value	SHGC	VLT
3/4" Clear	.48	2.08	.63	.65
3/4" Low-E	.34	2.94	.37	.55
3/4" Low-E/Argon	.31	3.23	.37	.55
Tested in accordance with ASTM standards; rated in accordance with International Residence Code, & witnessed by an independent AAMA accredited lab. Units were tested without dividers.

Note:
U Value=	Ultraviolet transferrance
R Value=	Restrictive ambient air flow
SHGC=	Solar Heat Gain Coefficient
VLT=	Visible Light Transmission

ENERGY STAR^® Qualification Criteria WINDOWS AND DOORS
Zone	U-factor	SHGC
Northern	≤ 0.35	Any
North/Central	≤ 0.40	≤ 0.55
South/Central	≤ 0.40	≤ 0.40
Southern	≤ 0.65	≤ 0.40

Last Modified: Wednesday, April 16, 2008 11:41:10 AM