Light Glass Transmitance - Enerank

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Light types Glazing

Light: Transmitance over glazing

Source: IDAE: Guía técnica del aprovechamiento de la luz natural en la iluminacion de edificios - 2005

Group	Type	Glass thikness (mm)	Air space thickness (mm)	Light transmision coefficient	Solar Factor	Transmitance (W/m2.K)
Simple	Clear	3		0.9	0.89	5.85
		4		0.89	0.85	5.8
		6		0.89	0.85	5.7

Double	Clear-Clear	4	6	0.79	0.77	3.3
		4	12	0.79	0.77	2.9
		4	18	0.79	0.77	2.7
		6	6	0.88	0.72	3.4
		6	8	0.88	0.72	3.2
		6	12	0.88	0.72	3

Double-reflectant	Clear	6	12	0.55	0.3	1.8
	Silver	6	12	0.3	0.32	1.8
	Green	6	12	0.23	0.21	1.8
	Dark green	6	12	0.2	0.18	1.8
	Bronze	6	12	0.18	0.23	1.8
	Blue	6	12	0.16	0.2	1.8
	Grey	6	12	0.14	0.21	1.8

Double low-emision	Clear	4	6	0.77	0.65	2.5
		4	12	0.77	0.65	1.8
		4	18	0.77	0.65	1.5
		6	6	0.67	0.52	2.4
		6	8	0.67	0.52	2.3
		6	12	0.67	0.52	1.8
	Reflectant	4	6	0.75	0.54	2.5
		4	12	0.75	0.54	1.6
		4	18	0.75	0.54	2.4

Triple	Clear	6	6			2.4
		6	8			2.3
		6	12			2.2

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