They are not from the manufacturer but from an independent service that is used by various states that are members of the eu.
As you can see, at -7 degrees celsius, the COP is still almost 4. So even at that temperature, this heatpump is still about twice as afficient as burning gas directly.
Of course, it depends on the correct installation. It's easier to screw up the installation of a heat pump than a gas heating system. But it doesn't invalidate the theoretical bounds.
Check those measures for some example heatpump: https://www.eurovent-certification.com/en/catalog/program/ce...
They are not from the manufacturer but from an independent service that is used by various states that are members of the eu.
As you can see, at -7 degrees celsius, the COP is still almost 4. So even at that temperature, this heatpump is still about twice as afficient as burning gas directly.
Of course, it depends on the correct installation. It's easier to screw up the installation of a heat pump than a gas heating system. But it doesn't invalidate the theoretical bounds.