One year with an 8kW Dakin Altherma 3

Interesting @chrisg

I stand corrected then. I have a 4-8kW version which does what I described, I assumed the 9-16kW one followed the same control logic your data shows not.

Agree that defrosts are a different story, there is some logic to throwing as much heat at it as possible following the defrost to get back up to temperature. It can create its own issues with frosting up again immediately but at least there is some logic behind it.