That’s not really true at all. Home heat pumps are stuck there because of the refrigerants used. Ammonia heat pumps can go way hotter (though still nowhere clo

That’s not really true at all. Home heat pumps are stuck there because of the refrigerants used. Ammonia heat pumps can go way hotter (though still nowhere close to those temps - more like 150c iirc), it’s just that ammonia requires safety controls that are impractical on a small scale.