Hello everyone in the forum!
I have a general question about fireplaces.
We are planning to build a single-family house with, among other things, geothermal heating, a centralized mechanical ventilation system with heat recovery, and underfloor heating.
With the planned insulation, it could possibly be a KfW-55 house.
In addition, we want to install a single-flue chimney with an air supply from the start.
Now I have been thinking about the future use of a fireplace:
Currently, in our apartment, the living room temperature is 22°C (72°F).
If we do the same in the house and do not open windows for ventilation because of the mechanical ventilation system, then the living room probably won’t cool down so quickly when the heating is turned down.
The underfloor heating actually takes several hours to warm up or cool down, right?
If we turn on the fireplace at 22°C (72°F) room temperature, wouldn’t it get unbearably warm in the living room? Or am I mistaken?
I have a general question about fireplaces.
We are planning to build a single-family house with, among other things, geothermal heating, a centralized mechanical ventilation system with heat recovery, and underfloor heating.
With the planned insulation, it could possibly be a KfW-55 house.
In addition, we want to install a single-flue chimney with an air supply from the start.
Now I have been thinking about the future use of a fireplace:
Currently, in our apartment, the living room temperature is 22°C (72°F).
If we do the same in the house and do not open windows for ventilation because of the mechanical ventilation system, then the living room probably won’t cool down so quickly when the heating is turned down.
The underfloor heating actually takes several hours to warm up or cool down, right?
If we turn on the fireplace at 22°C (72°F) room temperature, wouldn’t it get unbearably warm in the living room? Or am I mistaken?
I know that it is possible to control the underfloor heating separately.
But the point is that you have to turn it down beforehand if you want to use the fireplace in the evening.
If it is already consistently warm enough, then I don’t really need the fireplace. We want it less to save on heating costs and more for the coziness it provides.
But the point is that you have to turn it down beforehand if you want to use the fireplace in the evening.
If it is already consistently warm enough, then I don’t really need the fireplace. We want it less to save on heating costs and more for the coziness it provides.
Hello karliseppel,
thank you very much for your detailed post.
I am a complete beginner and therefore very grateful for your information.
I just have the concern of spending a lot of money on the chimney and fireplace, only to find out later that their performance does not meet expectations.
thank you very much for your detailed post.
I am a complete beginner and therefore very grateful for your information.
I just have the concern of spending a lot of money on the chimney and fireplace, only to find out later that their performance does not meet expectations.
cuhnie schrieb:
.....I am just worried about spending a lot of money on the chimney and fireplace, only to find out that their performance does not meet expectations. Your concerns are definitely justified! Check your heating load calculation, especially the room heating load of the installation space, and compare it with the minimum heat output required for a wood stove!
By the way: a dedicated air supply is always more efficient than a combined system!
Best regards
€uro schrieb:
By the way: a separate air supply is always more efficient than the combined system! Hello €uro, could you please explain that in more detail?
Hello,
When I was installing my masonry heater, I faced the same question. I calculated everything and then decided on a separate combustion air supply from below.
Excessive draft can sometimes be simply throttled back, but insufficient draft cannot be corrected afterwards!
The amount of air depends on the stove’s output. Based on that, both the air supply and the chimney need to be properly sized.
Best regards
cuhnie schrieb:In my opinion, the gap is often too small. Unlike with the air supply system (LAS) of a gas condensing boiler, there is no fan here to help overcome pressure losses.
Hello €uro, could you please explain that in more detail?
When I was installing my masonry heater, I faced the same question. I calculated everything and then decided on a separate combustion air supply from below.
Excessive draft can sometimes be simply throttled back, but insufficient draft cannot be corrected afterwards!
The amount of air depends on the stove’s output. Based on that, both the air supply and the chimney need to be properly sized.
Best regards
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