Hello everyone,
We have built a KFW55 house and are now facing the choice of a wood stove. Underfloor heating with a heat pump and a horizontal ground loop collector is installed, no exhaust heat recovery system. There is no proper heat load calculation available, except for the one from the underfloor heating manufacturer. However, that can be ignored as it was created in a very general way. How all this will work in practice is still uncertain since we will only move in two weeks. The estimated flow temperature should be around 32°C (90°F).
The stove location is the open kitchen/living room area with 55 m² (592 ft²). A central controlled mechanical ventilation system is installed. The goal is to bridge the transitional seasons and create a cozy ambiance. No water-based stove is desired, and no masonry heater.
I was thinking about a 5 kW model – or is that already too much that it might overheat the room? With these conditions, do I even need to consider parameters like efficiency and similar factors, or does it not matter and I could just get a stove from a hardware store?
We have built a KFW55 house and are now facing the choice of a wood stove. Underfloor heating with a heat pump and a horizontal ground loop collector is installed, no exhaust heat recovery system. There is no proper heat load calculation available, except for the one from the underfloor heating manufacturer. However, that can be ignored as it was created in a very general way. How all this will work in practice is still uncertain since we will only move in two weeks. The estimated flow temperature should be around 32°C (90°F).
The stove location is the open kitchen/living room area with 55 m² (592 ft²). A central controlled mechanical ventilation system is installed. The goal is to bridge the transitional seasons and create a cozy ambiance. No water-based stove is desired, and no masonry heater.
I was thinking about a 5 kW model – or is that already too much that it might overheat the room? With these conditions, do I even need to consider parameters like efficiency and similar factors, or does it not matter and I could just get a stove from a hardware store?
nordanney schrieb:
A large thermal mass means that a lot of heat is absorbed and then released again. That’s what I use when I want to heat my home.
If I just want to enjoy a nice fire without heating the whole room, I avoid that as much as possible. A basic retail store stove from around 1,000€ works fine for that. And if you want to see a big fire, you choose a stove with a large firebox and a big glass window. These can be rated at 12kW – from my experience, they work very well and don’t overheat the room. That’s the purpose of a stove. For ambiance, you can also use ethanol burners, which are much cheaper.
Thermal mass is needed to distribute heat over a long period of time. For us, that’s over 12 hours. When we heat up, the room temperature rises from 22 to 24–25°C (72–77°F) and stays like that for a long time.
Without thermal mass, the temperature quickly shoots up to 28°C (82°F), you have to ventilate, and you never achieve a comfortable climate.
That’s why, in new builds, stoves should only be installed if they have a large heat storage capacity or are connected to a water-based heating system.
R
Reini12342 Dec 2019 08:23The chimney inspector has already been here. We have a room-sealed chimney, but a pressure monitor was still required. We have implemented everything accordingly.
A Hase Dehli stove was recommended to me here; it has a power range of 3–6 kW and can be operated for a long time with only a small amount of wood. This means you wouldn’t have to run the stove at full capacity all the time to achieve a low-soot, clean burn. Are there any other recommendations?
A Hase Dehli stove was recommended to me here; it has a power range of 3–6 kW and can be operated for a long time with only a small amount of wood. This means you wouldn’t have to run the stove at full capacity all the time to achieve a low-soot, clean burn. Are there any other recommendations?
Reini1234 schrieb:
The chimney inspector has already been here; we have a room-air-independent stove, yet a pressure monitor was still required. We have implemented everything accordingly.
Here, someone already recommended a Hase Dehli stove, which has a range of 3–6 kW and can be operated with a low amount of wood over a long period. So you wouldn’t have to run the stove at full capacity constantly to achieve a low-soot, clean burn. Are there any other recommendations? That’s just playing with definitions. The Justus Reno also has 3.2–6.3 kW, though that’s only in the datasheet, not on the homepage, and Hase skillfully omits the nominal heat output for their stove, only mentioning the heat output range.
The Delhi 114 has 5 kW.
It only accepts 25 cm (10 inch) logs and is neither a long-duration nor intermittent burn stove. I would avoid it. Maximum log length is 20 cm (8 inches), one layer only, maximum 1.5 kg (3.3 lb) of wood...
Sounds like an expensive toy. But on the other hand, exactly what you are looking for.
N
nordanney2 Dec 2019 10:37Bookstar schrieb:
Without storage, it shoots up to 28, you have to ventilate and never achieve a comfortable climate.We had around 12kW and never got the living room above 25°C (77°F) (starting at about 21.5–22°C (71–72°F)). Independent of room air, without additional storage – it was just for fun.R
Reini12342 Dec 2019 10:4312kW? Do you have underfloor heating? If so, what temperature do you normally set it to?
N
nordanney2 Dec 2019 11:45Reini1234 schrieb:
12 kW? Do you have underfloor heating? If so, what temperature do you usually set it to? Yes, we did. However, the room temperature controllers were only decorative.
It was set to maintain around 21.5–22°C (71–72°F). The supply water temperature was about 26°C (79°F) under normal conditions (here in the Lower Rhine region, winters are not really cold). The underfloor heating pipes were installed with a very close spacing.
Similar topics