ᐅ Suitable Heating Concept for a KfW 40 Energy-Efficient House?
Created on: 30 Nov 2024 18:20
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Newbee-BW
Hello everyone,
I am in the initial phase of planning a 75 sqm (800 sq ft) bungalow without a basement. I have an offer for a KfW 40 energy-efficient house equipped with an air-to-water heat pump Vaillant aroTherm plus uniTower with VWL 105/6, a central ventilation system with heat recovery, and a 190-liter (50-gallon) hot water storage tank. Additionally, a photovoltaic system with 7.9 kWp and a battery storage of 5.24 kWh would be installed.
The house is planned only for me, with a maximum of one additional person. I work a lot from home, and my comfort temperature is around 22–23°C (72–73°F). I would prefer a system that requires little effort or adjustments regarding settings, etc.
From your perspective, does this offer make sense, or would a different heating system be more advisable?
Good luck
I am in the initial phase of planning a 75 sqm (800 sq ft) bungalow without a basement. I have an offer for a KfW 40 energy-efficient house equipped with an air-to-water heat pump Vaillant aroTherm plus uniTower with VWL 105/6, a central ventilation system with heat recovery, and a 190-liter (50-gallon) hot water storage tank. Additionally, a photovoltaic system with 7.9 kWp and a battery storage of 5.24 kWh would be installed.
The house is planned only for me, with a maximum of one additional person. I work a lot from home, and my comfort temperature is around 22–23°C (72–73°F). I would prefer a system that requires little effort or adjustments regarding settings, etc.
From your perspective, does this offer make sense, or would a different heating system be more advisable?
Good luck
N
Newbee-BW30 Nov 2024 19:05The Nibe F2050 is probably oversized then?
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nordanney30 Nov 2024 19:11Newbee-BW schrieb:
The Nibe F2050 is probably oversized then?Suitable for three of your houses.Yes, you lack experience with alternatives. Off the top of my head, I can’t think of a suitable heat pump small enough. What heating load was calculated? You select the heating system based on that.
I would recommend that you read up on air-to-air heat pumps. Domestic hot water can then be provided via a hot water heat pump.
You should reasonably take enough time to look at these things yourself and experience them up close. The impressions vary too much to rely solely on other people’s reports, since every technology has its pros and cons. In particular, you should consider your individual usage and preferences.
Since you are on your own, it’s relatively “simple” because you only need to consider your own requirements; it’s hard to assess an imaginary other person in advance.
Such a project involves many different aspects, so a questionnaire would be a useful starting point here, along with perhaps your current floor plan idea.
I think it’s important to know how you want to live in the house; the heating system is only one element among many.
We live as a couple in a KfW40 house (or even better in terms of measured values). If I had small children or were in a different life phase, the house would look completely different, including the heating system.
Some people like a fireplace as a main or supplementary heating source, while others don’t for various reasons, or find maintaining the fire inconvenient. We enjoy it, but I can also understand the opposite view.
I would definitely insulate to the highest possible standard—I am absolutely convinced of this now that I live in such a house. Then consider good window planning and shading, and after that, you won’t need much heating.
For example, we use the Arostor by Vaillant for hot water, so I think a hot water heat pump could be part of your considerations.
Since you are on your own, it’s relatively “simple” because you only need to consider your own requirements; it’s hard to assess an imaginary other person in advance.
Such a project involves many different aspects, so a questionnaire would be a useful starting point here, along with perhaps your current floor plan idea.
I think it’s important to know how you want to live in the house; the heating system is only one element among many.
We live as a couple in a KfW40 house (or even better in terms of measured values). If I had small children or were in a different life phase, the house would look completely different, including the heating system.
Some people like a fireplace as a main or supplementary heating source, while others don’t for various reasons, or find maintaining the fire inconvenient. We enjoy it, but I can also understand the opposite view.
I would definitely insulate to the highest possible standard—I am absolutely convinced of this now that I live in such a house. Then consider good window planning and shading, and after that, you won’t need much heating.
For example, we use the Arostor by Vaillant for hot water, so I think a hot water heat pump could be part of your considerations.
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nordanney1 Dec 2024 00:01I am currently reading in another post that there isn’t even an initial plan for the house yet.
Perhaps you should start with the planning first and then focus on the heating system. It’s understandable that you didn’t answer my question about the heat load calculation.
Perhaps you should start with the planning first and then focus on the heating system. It’s understandable that you didn’t answer my question about the heat load calculation.
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Newbee-BW1 Dec 2024 09:42No, I don’t have any planning done yet; I’m still at the very beginning. However, I’m trying to clarify as much as possible beforehand so that I can at least roughly assess whether what is being offered to me makes sense. If I have the planning done by an architect (design phases 1-3), will topics like heating, photovoltaics, and similar be addressed during that?
Newbee-BW schrieb:
No, I don’t have any plans yet; I’m still at the very beginning. But I’m trying to clarify as much as possible beforehand so that I can at least roughly assess whether what is being offered to me makes sense. If I have an architect carry out the planning (phases 1–3), will topics like heating, photovoltaics, etc., be addressed? That’s incorrect. The heating system should adapt to the planning. It doesn’t make sense to decide on a wedding dress before the bride even exists.
Here’s a tip: instead of posting similar questions with the same unknowns across several subforums, create one thread in the Planning subforum that covers your entire project. Introduce yourself and your project, share your site plan and room program. There is also a pinned questionnaire available.
In my experience, this approach is more effective for a beginner.
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