ᐅ KfW 40 house with a 10 kW wood stove—too large or appropriate?

Created on: 22 Dec 2024 13:38
P
PMW1993
Hello everyone,

We are currently planning to install a 10 kW wood stove in our open living, cooking, and dining area. It is intended solely to create a cozy atmosphere and will be lit in the evenings only; there is no water heat exchanger. My question is whether this capacity is oversized or appropriate? The area is about 80 m² (860 sq ft), see attached photos of the floor plan and excerpts from the stove manufacturer. Thanks in advance for your answers.
Best regards


Modern open living and kitchen area with kitchen island, four bar stools, wall shelves, and stove.

Floor plan of a house: living room, cooking/dining, hallway, utility room, WC, entrance, staircase.
A
Arauki11
25 Dec 2024 09:30
Neuer von Da schrieb:

As an air conditioner, the air source heat pump is a joke... It’s supposed to have a cooling capacity of 800 watts.
A forgotten triple-glazed window on the south side in summer and the house gets really warm.
We are considering installing a regular split air conditioning system.

I can’t say anything about air source heat pumps, we have installed the Daikin split air conditioner solely for cooling purposes, and it works excellently.
That it is sometimes also used for heating is more of a nice bonus.
Thanks very much for the other detailed information. Actually, the magnetic fans on the chimney pipe work quite well. We haven’t yet tried the probably even more effective ceiling variant, mainly because it’s not really a problem for us, and we manage well with the current setup; but especially also because we have a nice chandelier, and we wouldn’t really like how a fan would look next to it.
But good to know that it works and how, thanks!

@PMW1993 If at all with underfloor heating, I would choose a rather low-output stove, since it is mainly used for aesthetic or comfort reasons rather than for heating. You have your desired temperature continuously set on the underfloor heating, and any temperature increase moves you away from that. The more heating power the stove provides, the further you get from your comfortably set underfloor heating temperature.
I can only fully agree with @ypg, as I already experienced this effect with underfloor heating when it got warmer outside briefly in spring.
ypg schrieb:

Our house is open and about 130sqm (1400 sq ft) over two levels. The stove is located in the open space above. When we heat with our Olsberg stove without storage, providing about 5 kW, even I, who hates the cold, open the windows. The underfloor heating doesn’t immediately adjust downwards. The stove adds extra warmth for coziness, so the house eventually becomes very warm.
And no, if you want 4 hours of comfort, you should keep the fire going strongly for 2-3 hours, otherwise the chimney will become dirty and the glass will get stained.

Exactly the same applied to us. To prevent that, you would have to turn down the underfloor heating, but then it would be cooler than desired when the stove is off again.
Therefore, I would opt for a rather low heating output.
A
Arauki11
25 Dec 2024 11:57
nordanney schrieb:
The problem is that you are talking about a "boat," but the OP wants to buy a car. There is no comparison. It saves on every point.
@nordanney I think that @Neuer von Da was also responding to my specific follow-up question and that the text was directed at me.