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Originally Posted by LeftCoaster
First off the architect would never recommend nickel reflective glass because it's not 1982 anymore and secondly the city want's to push clear glass for green purposes as well as urban realm purposes.
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The 'greenest' solution would be a deep hole in the ground, and failing that no windows at all. I know you're reflecting a standard expectation, but I don't think the possibilities are so limited.
There are different coatings for windows that do more than trap infrared wavelengths to be green, like those that minimize water used for washing.
I'm sure there is a way for the choice of glass to minimize annual energy consumption, while aesthetically accentuating the sunlight. There's also the option to reduce heating/cooling costs in other ways.
I don't know what's available at reasonable pricing, but a simple diffraction pattern on the glass would be beautiful and shouldn't be too expensive. I have seen it used at least once (imagine microscopic dots, where the diffraction effect produces the colors seen on a butterfly's wings or a CD)
Which leaves 'urban realm' to be the true sticking point.
Is it ok to have more than one type of glass, say one for the towers and one for the podium? They can keep one standard for all the condo developers they say No to, while illuminating what can be a dull grey street during the winter.
So it can be greener, and improve the urban realm by not using all green glass. If it is actually attractive, and something you would want to frame in a photo with the new Art Gallery or from the foot of the future grand Georgia staircase to False Creek -- that's a bonus, take the money and run.
There's no way to rework this project while retaining the old post office, so just focus on getting the glass right.