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Shading coefficient?


Guest Tinster

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Guest Tinster

Hey guys....just as the topic says..had a customer reaming me with 800 questions...and this was one I couldnt answer. I've done very little flat glass(for friends businesses) because I'm an auto guy :thumb and I was stumped!

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Guest TintPoser
It's the overall performance of film and glass together. The true value of how each film performs, not TSER.

Car films have it unless you have not noticed.

Devil

[*]238376

Not to go too far off the initial question, but.....

It is a portion of the true value of the film. In some cases - Low E for instance - Luminius Efficacy may be a better judge of film performance if they want to stay Light.

IF you are looking for only Heat Rejection, this is the TEST.

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Ratio of solar heat gain passing through window film to the solar heat gain that occurs if the window were clear.? The lower the number, the better the insulating qualities of the window film/glass system.

[*]238327

It's the overall performance of film and glass together. The true value of how each film performs, not TSER.

Car films have it unless you have not noticed.

Devil

[*]238376

Shading coefficient is in essence a comparative measurement...

The ratio of the solar heat gain through a given glazing system to the solar heat gain under the same conditions for clear, unshaded double strength window glass (DSA). Shading coefficient defines the sun control capability or efficiency of the glazing system relative to a standard window.

The smaller the number, the greater the solar heat reduction. This term is a standard measure in the glass industry; used to rate the relative effectiveness of a glazing system compared to a "standard window."

Take a film with a shading coefficient of .30 for example, subtract it from 1 and you are left with .70, which means the glazing system with film is 70% more efficient in blocking solar energy than a glazing system without film.

In some cases - Low E for instance - Luminius Efficacy may be a better judge of film performance if they want to stay Light.

Please don't confuse them.

Low E and Luminous Efficacy are two distinctly different terms and measurements.

Low E (Low Emissivity) is acquired through far-infrared heat reflection, hence, the ability to reduce winter heat loss through windows.

And as TP stated but different wording... Luminous efficacy helps a customer decide which product is more efficient at blocking heat rather than light.

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