No, because those actually work. But they're also tricky to operate properly.

This seems more like "I want you to feel good about your purchase while you're still dependent on external energy inputs."

If you can find details on what it actually requires, please, share, because I've spent the past 15 minutes snoofing around and I sure can't find it.

Thanks. So gas water heaters are fine. Yay?

Basically, but it looks like this certification is protected and carries benchmarks, similar to the Energy Star program.

I live on campus at Cornell Tech. The student residence hall[0] there is built following Passive House standards and it is actually surprising how good it works. My one complaint is the heating and cooling systems in every apartment unit are very heavily regulated, so at times the inside feel and temperature aren't ideal. It's a minor thing though.

[0] https://thehouseatcornelltech.com/sustainability/

Passiv Haus (or loosely equivalently the US Passive House) is supposed to be a shorthand to express it takes less energy than conventionally required to achieve Net Zero. But not all Passiv Haus designs are necessarily Net Zero, and not all Net Zero designs necessarily use Passiv Haus to accomplish their rating.