[Greenbuilding] Solar Gain from South facing windows

[Ted Inoue]

Pilkington also has a glass, energy advantage, Optifloat, that has a single
low-e coating on the inside.It has a SHGC of ~0.7 and a U of ~0.3. From the
research I did, that's the best combination of high solar gain and low U.

One thing to keep in mind is that dielectric filters are angle dependant. So
they may be tuning the low-e coating to reject long wavelengths at high
angles. At lower winter angles, the spectral characteristics will shift
considerably. So it's quite possible to work for both applications.

On 6/13/07, Tom Wiprud <wipfamly at hutchtel.net> wrote:
>
> Some other posts have mentioned that low E glass does not reflect the
> summer
> sun.  Is this true?   I just read in a Marvin window catalog, that Low E
> lets the sun in in the winter, but reflects it out in the summer.    I am
> looking at using Marvin fiberglass Integrity windows, casement and awning
> types on my new house.  Thanks   Tom
>
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