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I have always wondered why awnings and similar covers aren't used more to shade buildings and keep them cool. It seems like the investment should pay itself off in reduced energy expenditures relatively rapidly.
Technology Connections on Awnings: https://www.youtube.com/watch?v=uhbDfi7Ee7k
Small ones like this may be fine, but buildings (especially old ones) may have surprisingly small margin for extra wind load laterally. What seems like a cheap option could require an expensive structural analysis, or an even more expensive later repair.
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