[INDENT] Hello everyone,
We will soon start building our house. It will have 120 m2 (1300 sq ft) plus a habitable basement, totaling 160 m2 (1720 sq ft). It will meet KfW 70 standards according to the 2009 energy saving regulations, with an air-to-water heat pump.
A chimney for a fireplace is also included.
Now, my wife is currently choosing the most beautiful wood stoves with about 10 kW output, but I’m worried that because the house is so well insulated, it will soon feel like we have a 160 m2 (1720 sq ft) sauna.
What output should the fireplace have? Or is my concern unnecessary?
Regards, Uwe
We will soon start building our house. It will have 120 m2 (1300 sq ft) plus a habitable basement, totaling 160 m2 (1720 sq ft). It will meet KfW 70 standards according to the 2009 energy saving regulations, with an air-to-water heat pump.
A chimney for a fireplace is also included.
Now, my wife is currently choosing the most beautiful wood stoves with about 10 kW output, but I’m worried that because the house is so well insulated, it will soon feel like we have a 160 m2 (1720 sq ft) sauna.
What output should the fireplace have? Or is my concern unnecessary?
Regards, Uwe
B
Bauexperte14 Jan 2014 00:10Good evening Uwe,
Do you already have a building permit / planning permission?
You should have a thermal protection certificate for the house; ideally a heating load calculation. You should find the information there.
Regards, Bauexperte
uwe72 schrieb:
We will soon start building our house. 120 m2 (1290 sq ft) plus a heated basement. (Total 160 m2 (1722 sq ft))
KfW 70 standard according to the 2009 Energy Saving Ordinance with an air-to-water heat pump.
Do you already have a building permit / planning permission?
uwe72 schrieb:
What output is allowed for the fireplace?
You should have a thermal protection certificate for the house; ideally a heating load calculation. You should find the information there.
Regards, Bauexperte
D
DerBjoern14 Jan 2014 08:07Actually, for new builds you can generally assume that a chimney like this is oversized. I would choose one with the lowest possible output. However, it becomes challenging to find one with less than 5 kW (17,000 BTU/h).
uwe72 schrieb:
.... we will soon start building our house. 120 m2 plus a finished basement. (Total 160 m2 (1722 sq ft)) KFW 70 standard according to the Energy Saving Ordinance 2009 with an air-to-water heat pump......What heating capacity is allowed for the fireplace?.. As a smart builder, you surely have a detailed system plan and sizing, which is especially important for air heat pumps. The heating load calculation should indicate the room heating load for the space where the unit is installed. You can base your decision on that! uwe72 schrieb:
....Or is my concern unfounded? No!Best regards,
In general, you can assume two things: 10 kW is too much, and the wood stove only heats the room it is located in...
Ours has 5 kW and is placed right by the door to the living room. However, hardly any heat reaches the stairwell without a fan.
Some heat is recovered through the ventilation system, but for us, the stove is just a nice addition when we want to create a cozy warmth in the evening.
If you actually plan to use the stove to cover part of your heating demand, you will need a designer to properly size the system for you.
Ours has 5 kW and is placed right by the door to the living room. However, hardly any heat reaches the stairwell without a fan.
Some heat is recovered through the ventilation system, but for us, the stove is just a nice addition when we want to create a cozy warmth in the evening.
If you actually plan to use the stove to cover part of your heating demand, you will need a designer to properly size the system for you.
D
Doc.Schnaggls14 Jan 2014 13:34Hello,
I also think that 10 kW is probably somewhat oversized.
In our new build, a soapstone stove with 5 kW will be installed in the open living/dining area of about 60 m² (650 sq ft) – and even that is more than what the heating demand calculation suggests. We should ideally install a stove with a maximum of 4 kW, but it was impossible for us to find a stove of that size that we also liked...
Best regards,
Dirk
I also think that 10 kW is probably somewhat oversized.
In our new build, a soapstone stove with 5 kW will be installed in the open living/dining area of about 60 m² (650 sq ft) – and even that is more than what the heating demand calculation suggests. We should ideally install a stove with a maximum of 4 kW, but it was impossible for us to find a stove of that size that we also liked...
Best regards,
Dirk
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