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by nomadluap 2242 days ago
There are already some solutions around that try to address this on a consumer level. I recently watched a teardown for a piece of test gear that utilizes frequencies injected directly to the mains supply in order to control home hot-water heaters in Australia[0].

That's the great thing about standards -- there are so many to choose from!

[0]: https://www.youtube.com/watch?v=Po4b7JhpxKQ