Underfloor heating air-water heat pump. House too warm when the sun shines

The heating definitely wasn’t optimized.

Well, you probably have a massive increase in consumption compared to a proper setting. And then you prefer to save on comfort, which probably doesn’t even remotely compensate for the extra consumption caused by the poor setting. Besides, the heat pump will break down faster... A somewhat odd but not entirely inappropriate comparison: It’s like driving a car with the handbrake half-engaged, flooring it repeatedly in second gear. But instead of releasing the brake, shifting two gears higher, and driving more smoothly, you’d rather be annoyed by high fuel costs and only drive 30 mph outside town to save fuel. And after a few years, you’re annoyed because the car has such high repair costs.

Well, you presumably have massive excess consumption compared to a proper setting. And then you'd rather save on comfort, which probably won't even remotely compensate for the excess consumption caused by the poor setting. Besides, the heat pump breaks down faster...

A somewhat odd, but not entirely inappropriate comparison: It's like constantly flooring it in second gear with the handbrake half engaged in a car. But instead of releasing the brake and shifting up two gears, you'd rather annoy yourself with high fuel costs and drive only 30 mph outside town to save fuel. And after a few years, you get annoyed because the car has such high workshop costs.

At least still this year

At least still this year

Pink Forum

I also had much higher consumption with the “factory settings” of our heating technician. after optimization with the help of the forum 10000x more efficient

Actually pointless, especially now with the high outside temperatures a well-adjusted heat pump runs with COPs beyond 6. Have you considered the usual tips, deactivate ERRs, lower the heating curve, close the bypass valve, etc.? My setting: trim the heat pump to the max for efficiency. And then I treat myself to comfortably warm in the well-insulated cabin at a low price. If it doesn’t save at least 15 euros more per month, then just heat half as much...

Ours is really meticulously adjusted, but this Novelan junk currently doesn’t deliver more than 3 to 4 as COP. And yes, the loops in the ground are tight and meticulously laid, etc....

Ours is really meticulously set, but this Novelan stuff currently doesn't deliver more than 3 to 4 as an efficiency rating. And yes, the loops in the floor are tight and laid meticulously, etc....

That's surprising, what model do you have? Currently, with still mild temperatures in heating mode, it should easily be over 4.