Building a house with an architect - Which heating system?

Solar thermal energy, ah oKay. Unfortunately, I haven't found an installer yet who carries the manufacturer.

: The costs were €46k including a controlled residential ventilation system from Vallox (including drilling, underfloor heating = everything complete) : The manufacturer is Waterkotte, we don’t have ST (ST = solar thermal). I don't think much of ST, prefer photovoltaics ;)

Solar thermal energy with geothermal energy? But that can really confuse the pump and cause it to cycle.

Solar thermal energy, ah okay. Unfortunately haven’t found an installer yet who carries the manufacturer

We would have had Viessmann as an alternative, but it is louder in operation.

Do you know how much the ventilation system and the drilling [einzeln] cost? That’s quite a chunk...

We were strongly advised Solvis with a 900l stratified storage tank and ST. Alternatively, a compact system from AI. We also had Vailand with a 300T buffer... none of the installers thought of [Photovoltaik] until we suggested it :/ we have not decided yet but tend towards the AI with [Photovoltaik]... although the installer said that there might be too little hot water with 180l