Vaillant Arotherm Owners Thread

I’d love to. But I can’t. Vaillant does not make this configurable.

I also do not know my average daily turnover unfortunately.

My 190 liter tank (uniTOWER) is configured to 45ºC with 5º hysteresis. Based on your diagram, I think I’ll:

  • change it to 48ºC and keep the 5º hysteresis — which should keep me in the dormant/slow growth parts
  • disable the legionella run

It definitely is destroying efficiency. That’s crystal clear.