Water-bearing fireplace stove in new construction - yes or no?

yes, but basically I find 26°C almost too warm

But the above-mentioned 19°C basically as too cold

Depends on the room, I would say. For basements almost too warm again, for bedrooms ideal, etc.

For the two, yes, but for everyone else probably too cold. At least for me personally. You are welcome to feel differently.

I would be happy if I had a nicely cold room in the basement, which is to be included in the thermal envelope, ideally around 10°C for food/beverage storage [U].

we have a kfw40+ house with 300m². the open space on the ground floor where the justus Reno R is located is roughly 70m².

the rooms with closed doors had 19 degrees, the rooms with open doors upstairs had 21-22 degrees, for example also the master bathroom.

we had the time (2 weeks with heating off) around zero degrees. the stove was fired up properly once in the morning, then burned less strongly during the day, and fully stacked again in the evening before going to bed. softwood boards from the construction phase. over New Year's Eve, when we were away from the house for a long time, we stacked 6KG of lignite to keep the house warm.

the stove is not water-connected, the heat distribution worked only through natural air exchange via the staircase to the upper floor and the controlled residential ventilation with heat recovery.

we just wanted to test if we could keep the house warm in case of a blackout. we can.

what surprised us was that even the bathroom is nicely warm.

per week we had a 10l bucket full of ash.

for a water-connected wood stove to be worthwhile, you definitely have to heat more strongly than we did, so above 25 degrees in the room where it is installed. and we have a spacious airy house.