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Differentiating high solar gain and low solar gain windows

Rob Myers | Posted in General Questions on

This question is related to a recent thread on measuring performance of existing windows.
Is a solar incidence meter/heat lamp setup a reasonable way to differentiate high solar gain and low solar gain windows? The solar meter is sensitive from 400 to 1100 nm (but not a flat response curve) and readings were taken at a baseline and then with glazing between the lamp and the meter. I understand that the measurement may not be accurate in terms of absolute SHGC but am I correct in assuming that there should be a measurable difference in the % transmission under these conditions?

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  1. charlie_sullivan | | #1

    Yes, as a way to see that windows are different this should work fine, even though, as you say, it won't provide an accurate measurement of SHGC.

  2. Rob Myers | | #2

    Thanks Charlie, I just wanted to be sure that my reasoning was sound.

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