I think that is just an update.
The PGH concept has been around for a while now; and needed an update.
The BeOpt software created ''issues'' in its original format.
Even the new Grace Vycor Env-S... while much better than the older system... still lacks the important feature of the HydroGap.
And the R8 and R11 window dreams of a decade ago have gone right down the drain. The optical vinyl couldn't handle the heat load of being trapped between the glass.
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