Altuglas International: Europe/Americas/Asia: Solar Energy Transmittance and Shading Coefficients

Table 10: Solar Energy Transmittance and Shading Coefficients
Sheet	Transmittance (%)		Shading Coefficients
	Visible Light*	Solar Energy	Single-Glazed		Double** (V&H)
	Visible Light*	Solar Energy	Vertical	Horizontal	Double** (V&H)
2074 Gray 2538 Neutral Gray 2064 Gray 2537 Neutral Gray 2094 Neutral Gray 2514 Neutral Gray 2515 Neutral Gray	12% 16 27 33 45 59 76	24% 27 36 41 55 62 74	0.50 0.52 0.59 0.63 0.74 0.80 0.89	0.28 0.46 0.50 0.59 0.71 0.78 0.88	0.34 0.36 0.44 0.49 0.61 0.68 0.78
2370 Bronze 2412 Bronze 2404 Bronze 2539 Bronze 2540 Bronze	10 27 49 61 75	20 35 56 62 75	0.46 0.58 0.75 0.80 0.90	0.40 0.53 0.72 0.78 0.89	0.30 0.43 0.62 0.68 0.79
2111 Green 2092 Green 2069 Blue Colorless	77 26 55 92	76 57 71 85	- - 0.89 0.98	0.92 0.68 0.87 0.89	0.81 0.54 0.77 0.89

*Visible transmittance is measured using C.I.E. Source C.
**Tinted Plexiglas^® sheet outside, 1/4" air space and colorless Plexiglas® sheet inside. For best control of solar heat gain, use the transparent color as the outer pane in multi-pane glazings.