Heat pump in connection with house air conditioning

if the topic is so important, I would rethink summer heat protection (especially the roof and wall construction) even more. Also, possibly build a passive house instead of KfW55.
My bedroom (facing north and WITHOUT any heating and thus without a PC) still remains tolerable in summer. 2-5° less could not hurt during longer heat periods.

All those who claim that only an air conditioning system can achieve what you are looking for are probably right, but from experience I can say that the 2-3° passive cooling from our brine-to-water heat pump in our passive house provides me with significant "relief" in summer. It has now already been hot enough outside for several days to judge that.

If I were to build again, I would still add a central air conditioning system AND an earth-air heat exchanger to the future house. Simply because I never knew that air conditioning systems consume so little electricity, which you anyway have left over in summer with suitable photovoltaics.

But I can say from experience that the 2-3° passive cooling through our brine-water heat pump in our passive house is clearly

My bedroom (facing north and WITHOUT any heating and thus without PC) still remains tolerable in summer. 2-5° less, however, could not hurt during a longer heat period.

Reading, reading, reading helped me with this. Everyone has 24 hours a day available, you just have to use them ;) Unfortunately sometimes quite dry / technical. Especially the topics photovoltaics, heat pumps and "our" SmartHome system were extremely time-consuming :oops: to get an idea of what is "right" for us. The advice or offers from some trades were sometimes really "wrong".

A lot of time was also spent on ideas that ultimately were not implemented (ring trench collector, infrared heating, weather station).

If I had more time ... But the whole life is a compromise ...