Happy Easter everyone.
We are building a two-story city villa with approximately 200 square meters (2,150 square feet) of living space. It will include three bathrooms in total (main bathroom with a bathtub, a children’s shower bathroom, and a guest toilet). We are building to the KfW 55 energy efficiency standard. Starting mid-year, there will be three of us, and a fourth pair of feet is already being planned in our minds.
The developer offers an air-to-water heat pump, model Novelan LAD 7 CSD. A controlled residential ventilation system is already planned.
However, I would like to discuss a different concept with you: gas condensing boiler combined with solar thermal, a large buffer tank, and a fireplace or pellet stove with a water jacket.
My idea is this: I consider solar thermal to be reasonable. Even with an air-to-water heat pump, I would add solar thermal. So having a large buffer tank would already be relevant for us. We also want to have a fireplace or pellet stove in the living room anyway. The additional cost for the water-heated version would therefore be completely acceptable.
I do not want to debate the general pros and cons of air-to-water heat pumps compared to a gas condensing boiler, but rather open my concept for discussion. Do you have any ideas or suggestions for me?
We are building a two-story city villa with approximately 200 square meters (2,150 square feet) of living space. It will include three bathrooms in total (main bathroom with a bathtub, a children’s shower bathroom, and a guest toilet). We are building to the KfW 55 energy efficiency standard. Starting mid-year, there will be three of us, and a fourth pair of feet is already being planned in our minds.
The developer offers an air-to-water heat pump, model Novelan LAD 7 CSD. A controlled residential ventilation system is already planned.
However, I would like to discuss a different concept with you: gas condensing boiler combined with solar thermal, a large buffer tank, and a fireplace or pellet stove with a water jacket.
My idea is this: I consider solar thermal to be reasonable. Even with an air-to-water heat pump, I would add solar thermal. So having a large buffer tank would already be relevant for us. We also want to have a fireplace or pellet stove in the living room anyway. The additional cost for the water-heated version would therefore be completely acceptable.
I do not want to debate the general pros and cons of air-to-water heat pumps compared to a gas condensing boiler, but rather open my concept for discussion. Do you have any ideas or suggestions for me?
Knallkörper schrieb:
The total cost for your maximum setup is already substantial. You need to integrate three different energy sources with their respective temperature levels, requiring a very large storage tank, probably with multiple heat exchangers, and a pump for each energy source, plus likely a backup pump for the stove. Just designing and controlling the system would be challenging for most heating installers. A wood stove probably won’t pay for itself, whether it has a water jacket or not.You are absolutely right. I have seriously considered this argument in my planning, and I have now moved away from the maximum setup (see my previous reply).
Baraja schrieb:
I slept on it overnight, and the issue with “painting over the last layer” was a dealbreaker for my concept. No offense intended, I didn’t mean for it to come across as rude or arrogant [emoji4]
A conventional panoramic fireplace will be included in our build as well, with a similar usage pattern to yours. At first, I also considered a water jacket because it sounded tempting to use the heat twice. After more careful consideration (payback period) and feedback from this forum, I quickly dropped the idea. So it was genuinely meant as constructive feedback, even though it might have seemed different on a second reading.
ruppsn schrieb:
No offense intended, I hope it didn’t come across as rude or arrogant [emoji4]
A simple panoramic fireplace will also be installed in our house, used in a similar way as yours. At first, I also wanted a water jacket because it sounded appealing to be able to use the heat twice. But after giving it more thought (payback period) and advice from this forum, I quickly dismissed the idea. So it really was meant constructively, even if it might have been interpreted differently on a second read.Same here. I found your comment really helpful. I read my post without the last sentence and had to smile. So no worries and thanks for the help.