Technical Information

We have an array of resources regarding glass ratings and formulas.

Select a series in the dropdown to analyze the NFRC energy ratings, and PDF Links for formulas and patterns are below.

Energy Star 7 Compliant NFRC Ratings

1900/1950 Series (Single Hung)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
1900/1950	Clr	N/A	5/8"	0.49	0.63	0.57	0.65	0.58
1900/1950	LoE	Cardinal 270	5/8"	0.35	0.3	0.27	0.55	0.49
1900/1950	LoE / Argon	Cardinal 270	5/8"	0.31	0.3	0.27	0.55	0.49
1900/1950	LoE	Cardinal 366	5/8"	0.35	0.22	0.2	0.51	0.46
1900/1950	LoE / Argon	Cardinal 366	5/8"	0.3	0.22	0.2	0.51	0.46
1900/1950	LoE / Argon	Cardinal 366/I89	5/8"	0.27	0.22	0.2	0.5	0.45

900/950 Series (Single Hung)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
900/950	Clr	N/A	5/8"	0.49	0.62	0.56	0.65	0.58
900/950	LoE	Cardinal 270	5/8"	0.35	0.3	0.27	0.55	0.49
900/950	LoE / Argon	Cardinal 270	5/8"	0.31	0.3	0.27	0.55	0.49
900/950	LoE	Cardinal 366	5/8"	0.35	0.22	0.2	0.51	0.46
900/950	LoE / Argon	Cardinal 366	5/8"	0.3	0.22	0.2	0.51	0.46
900/950	LoE / Argon	Cardinal 366/I89	5/8"	0.26	0.22	0.2	0.5	0.45

1901/1951 Series (Picture)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
1901/1951	Clr	N/A	5/8"	0.47	0.66	0.62	0.69	0.62
1901/1951	LoE	Cardinal 270	5/8"	0.33	0.31	0.28	0.59	0.52
1901/1951	LoE / Argon	Cardinal 270	5/8"	0.28	0.31	0.28	0.59	0.52
1901/1951	LoE	Cardinal 366	5/8"	0.32	0.24	0.22	0.54	0.48
1901/1951	LoE / Argon	Cardinal 366	5/8"	0.28	0.23	0.21	0.54	0.48
1901/1951	LoE / Argon	Cardinal 366/I89	5/8"	0.24	0.23	0.21	0.53	0.47

901/951 Series (Picture)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
901/951	Clr	N/A	5/8"	0.48	0.66	0.6	0.69	0.62
901/951	LoE	Cardinal 270	5/8"	0.33	0.32	0.29	0.59	0.52
901/951	LoE / Argon	Cardinal 270	5/8"	0.29	0.31	0.28	0.59	0.52
901/951	LoE	Cardinal 366	5/8"	0.33	0.24	0.22	0.54	0.49
901/951	LoE / Argon	Cardinal 366	5/8"	0.28	0.23	0.21	0.54	0.49
901/951	LoE / Argon	Cardinal 366/I89	5/8"	0.24	0.23	0.21	0.53	0.47

920 Series (Slider)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
920	Clr	N/A	5/8"	0.48	0.62	0.56	0.65	0.58
920	LoE	Cardinal 270	5/8"	0.35	0.3	0.27	0.55	0.49
920	LoE / Argon	Cardinal 270	5/8"	0.3	0.29	0.26	0.55	0.49
920	LoE	Cardinal 366	5/8"	0.34	0.22	0.2	0.51	0.45
920	LoE / Argon	Cardinal 366	5/8"	0.29	0.22	0.2	0.51	0.45
920	LoE / Argon	Cardinal 366/I89	5/8"	0.25	0.21	0.19	0.5	0.44

1500 Series (Casement)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
1500	LoE	Cardinal 270	5/8"	0.31	0.26	0.24	0.48	0.44
1500	LoE / Argon	Cardinal 270	5/8"	0.27	0.26	0.24	0.48	0.44
1500	LoE	Cardinal 366	5/8"	0.31	0.2	0.18	0.45	0.41
1500	LoE / Argon	Cardinal 366	5/8"	0.27	0.19	0.18	0.45	0.41
1500	LoE / Argon	Cardinal 366/I89	5/8"	0.26	0.19	0.18	0.44	0.4

1600 Series (Awning)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
1600	LoE	Cardinal 270	5/8"	0.31	0.26	0.24	0.45	0.44
1600	LoE / Argon	Cardinal 270	5/8"	0.28	0.26	0.24	0.48	0.44
1600	LoE	Cardinal 366	5/8"	0.31	0.2	0.18	0.45	0.41
1600	LoE / Argon	Cardinal 366	5/8"	0.27	0.19	0.18	0.45	0.41
1600	LoE / Argon	Cardinal 366/I89	5/8"	0.24	0.19	0.17	0.44	0.4

1000 Series (Patio Doors)

Series	Glass Type	LoE Type	OA IG Thickness	U Value	SHGC 1/1	SHGC D/L	VT 1/1	VT D/L
1000	LoE	Cardinal 270	5/8"	0.33	0.31	0.27	0.58	0.51
1000	LoE / Argon	Cardinal 270	5/8"	0.29	0.3	0.27	0.58	0.51
1000	LoE	Cardinal 366	5/8"	0.32	0.23	0.21	0.53	0.47
1000	LoE / Argon	Cardinal 366	5/8"	0.28	0.23	0.2	0.53	0.47
1000	LoE / Argon	Cardinal 366/I89	5/8"	0.24	0.22	0.2	0.52	0.46