[ricardobayes]

The new, (bio-)propane refigerated ones (R290) are pretty good and work well with the radiators most Europeans have at home. They are reliably capable of emitting up to 75C outlet water. At the moment they are approx. 1.5-2x more expensive, I hope that will come down somewhat. I really hope after a few years a good heatpump will reach cost parity with a good boiler (installation that is).