Difference between Single silver low-E,double silver low e and triple silver low e

Soft coated low e glass is widely used in modern glass curtain wall.But many designers and owners doesn’t know clearly the difference between single silver low e ,double silver low e and triple silver low e.

 

Here we introduce several main difference to help you identify the different low e coating.

The single,double,triple here means the silver layers quantity, the low-E coating is made with multi layers metallized layers which has different functions,for example some layers protect the silver layer,some layers decide the color and SHGC,while silver layer is the most important part that reflect the solar radiation and decide the final low-E coating energy efficiency.The more silver layers,the higher LSG and better capability transforming solar heat to lights that doesn’t contain heat.

1.LSG. LSG is the ratio between the glass light transmittance and SHGC.

 

Double silver low e has relatively lower SHGC than triple silver low e based on same light transmittance.

The LSG of single silver low e is around 1.4,while double silver one can be over 1.6-2,triple silver low e LSG can reach 2.2 or even more.

Which means that under the same light transmittance,the double silver low e and triple one can reach lower SC value and transfer the lighting to cold light,low e U value performance

No.	Glass option	Thick	Visible Light			Solar Energy		U value(W/2.K)		SC	SHGC
		(mm)	LT %	Ref %	In %	Tsol %	Rsol %	Summer	Winter
1	6MWSE0160+12A+6	24	53	19	11	33	25	1.84	1.84	0.44	0.38
2	6MWDE0156+12A+6	24	51	15	19	24	32	1.54	1.61	0.32	0.28
3	6MWTE0158+12A+6	24	52	14	19	26	39	1.55	1.62	0.29	0.25

 

2.U value.

Single silver low e U value is about 1.7-1.85.

Double and triple silver low e U value is around 1.5-1.65 with better thermal insulation performance.

 

3.Price.

Double silver low e glass is about USD3-4/SQM higher than single one ,and triple silver low e is about USD10/sqm higher than double one.

But the cost performance for triple one is not good,so in most cases we recommend double one and the best cost performance low e for glass facade.

Morn is your turnkey low e double glazed units supplier,we offer comprehensive low e coating with different performance data to meet your project requirement.

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