I was just quoted this week for a CO2 heat pump set up that promises 62 deg Celsius water output with COPs that are at a range similar to that of regular heat pumps. The details on this company are scarce, so I'm treading cautious.

Claims COP A7/W35 (I can't tell what A7/W35 means) of 4.8!

https://www.durocan.com/specificaties/

https://www.durocan.com/co2-heat-pump/

Curious if folks who know about heat pumps here have any opinions on this.

EDIT: It appears to be a Dutch company (I live in NL) that has licensed the CO2 heat pump tech from an American company - https://www.smallplanetsupply.com/sanc02