Combustion air supply / chimney stove - thermal air draft or base plate

What kind of fireplace do you want it to be? Since you have talked to a fireplace builder, I assume you want to have it built by them? The background of the question is that you don’t replace such a fireplace after 5 years... The supply air can also be realized through core drilling/wall sleeves in the exterior wall and be built in. The thermal air draft will also work, although in bad weather conditions (storm) it may lead to worse draft... So just relax for now. No decision you make will lead to disaster. Do you have a [Kontrollierte-Wohnraumlüftung] because of the [Druckluftwächter]?

May I briefly ask all "new build + wood stove" owners how it is even possible to operate a fireplace in the currently very well insulated houses?

Due to the inertia of underfloor heating and the good insulation of the building envelope, I hardly see how this could be done properly. I first have to heat up properly so that the stove draws, to avoid blackening the whole neighborhood. But until then, I have at least four to five degrees more inside, right? And only then am I at the point where I can slowly burn a few logs under oxygen deficiency for the sake of romance. And then the temperature rises even further, since the underfloor heating can’t shut off quickly.

On top of that, nowadays few people build large enough to maintain a distance of three or four meters from the stove permanently. And in that area, such a thing radiates quite a bit of heat. That would quickly become uncomfortable for me...

Do you then ventilate it out again? Or are there such small stoves that hardly warm the place? Where do I get the small logs then?

2Topic: Because of these concerns, I would currently refrain from having a fireplace. At most, if you build 200 sqm, just about according to the energy saving ordinance with a gallery up to the roof AND target temperature of the underfloor heating around 18°C. But I’m happy to be proven wrong.

Since this problem, that the house overheats quickly, was explained to us, we were given a special storage that initially stores the energy and releases it slowly over several hours. Fireplace system is from [austroflamm].

My experience, after we have already lit the stove a few times but have not yet moved in, I can briefly describe. Our living space is 56 m² with a ceiling height of 2.6 m. We heat with softwood. The stove has a large storage, so it warms up rather slowly and stays warm longer:

-If the room previously had its 22 °C from the underfloor heating, it becomes uncomfortable.
-Actually, one should decide at noon whether the stove should be fired up in the evening or not.
-If the whole house has "cooled down" to 14 °C, then with the living room door open, the upper floor also becomes warm. That does not take longer than 2 hours. This warmth is then very pleasant.
-If the stove is heated for several hours and the storage magazine is correspondingly heated, then the room is still warm the next morning.
-A distance of 2 m should definitely be maintained, that has always been the case.

Regarding the combustion behavior: Every stove that is in order should actually draw well immediately. At the beginning, one does not fully stack the stove, so less combustion air is needed. Also, one should never regulate the performance in such a way that the fire suffers from oxygen deficiency and does not burn cleanly. That harms the stove. The performance can reasonably only be varied by the amount of firewood.

Two reasons that for me do not justify the stove, but explain it:

-Independence from the energy supplier (district heating), in case of power outage, etc.
-After a longer absence (heating off), quick heating up is possible.

Thank you very much for the many opinions. Actually, we only want a wood-burning stove. The ventilation system is supposed to ensure that the living area of about 45 sqm does not overheat and that the heat is distributed throughout the entire house. Primarily, the wood-burning stove should bring a little "romantic" coziness. That the stove also heats on the side is secondary for us.

The exciting question for us is rather whether we should stick to the combustion air supply via the thermoluf duct in the chimney or, as preferred more by the stove builders, get the supply air through the floor slab.

As some have written here, condensation formation seems to be primarily a problem with supply air through the floor slab. However, the thermoluf duct in the chimney can cause problems when lighting the fire.

Does anyone here have a wood-burning stove with [Kontrollierte-Wohnraumlüftung] in operation and can say something about the draught through the chimney? We are also not particularly comfortable having a hole in the floor through which we bring in cool air and, if things go badly, also vermin into the super well-insulated place.

Thank you for your support,

May I briefly ask all owners of "new builds + wood stove" how it is even possible to operate a fireplace in the currently very well-insulated houses?

Not at all. That is why, in new builds, if at all, only a small basic stove makes sense. Of course, it costs correspondingly more money.

The ventilation system is supposed to ensure that the living space of about 45 sqm does not overheat and that the heat is distributed throughout the entire house.

Our energy consultant and also the architect strictly advised against this way of thinking. Generally, I am rather skeptical of all warm-air heating systems because, first, a lot of heat accumulates under the ceiling and, second, convection stirs up and distributes dust. Furthermore, radiant heat is significantly more pleasant.