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

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.