RE: [GBlist] Low E glass

[Alan Courtright <acourtri@linknet.kitsap.lib.wa.us>]

Thanks for the good rundown and the URL; much appreciated.  A couple of
further questions:

On Wed, 2 Jan 2002, Ralph Bicknese wrote:

> Low e coatings are selective coatings.  That means one can choose coatings
> with different properties.  Having various low e properties to choose from
> gives a designer the option of specifying different glass for different
> climates or at different orientations.  The "northern" and "southern"
> designations are really just marketing buzzwords and I think confuse rather
> than clarify the issue. The main difference between "northern" and
> "southern" coatings is that the southern coating provides more shading and
> less solar penetration through the glass.

Can it be assumed that most places selling windows know about such things,
or is it wise to learn enough about them to specify to a contractor or
window supplier?

> Southwall Technologies offers glass with selective low e coatings with
> various shading coefficients.  If a person wants a window with high solar
> heat gain potential and high light transmittance to increase daylighting,
> one would select a highly insulating glass with a low shading coefficient.
> This will give a high solar heat gain factor. This type of window is often
> used in passive solar heating applications.

How permanent are the coatings used?  Can one assume that they're MOL
permanent?
                         -|//*Alan Courtright*\\|=   
                                Poulsbo, WA
                             acourtri@krl.org
                       



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