, we are not talking about a fireplace that should manage without additional heating. Build your house without a fireplace, but please don’t rely on hearsay arguments and spread them as fact in the forum.
You yourself have not yet had any experience, whether pro or con, in a new building!
This forum lives from experiences that have been made. You are welcome to ask your questions here that arise for you!
I did not say that the fireplace should be the sole heat source. On the contrary – it is an auxiliary heater, and that is what makes it so difficult. The underfloor heating with AT sensor, well-designed heating curve, and hydraulic balancing perfectly and evenly tempers the house. The heating load of the house is 3-5 kW without reserves and without hot water. The heating load of the living/dining room is certainly around 1 kW and no more, whereby the 1 kW is only needed at the design temperature of -12, -14, -16, -18 degrees.
And now in the living room, next to the 0,x kW heating capacity of the underfloor heating, there is an additional 9 kW heating capacity from the fireplace. Wow, can someone open the window and create a draft?
I brought the topic back to the table because I was in such a fireplace room over the weekend. I don’t know whether it was oversized, whether it was operated correctly, etc. – but phases of "Wow, heat" alternated with "Now it’s getting cold" repeatedly when wood was added and burned down again. It was a real, masonry fireplace and of course we had windows open and draft, otherwise it was unbearable (in a T-shirt).
As great as it sounds at first, I cannot imagine a sensible mode of operation for a fireplace in a house insulated and built to today’s standards.
Dust scorch marks already occur at an air temperature of 50 degrees and are a known problem with radiators and recently with air-to-air heat pumps. Also directly near the fireplace the temperature exceeds 50 degrees and dust scorch marks occur there as well.