ᐅ Heating System for a Bungalow with Two Residential Units
Created on: 30 Jun 2023 11:34
H
Hausbau_Laien
Hello dear forum community,
My wife and I are currently planning a new build together with her parents.
It will be a bungalow with two adjacent residential units (total living area approximately 250 m² (2690 sq ft)).
As beginners in planning, we are now facing some questions that are quite challenging for us, and we are unsure what would be the best solution in the end.
One of these questions is how to design the heating system:
So far, the plan is to use a heat pump with geothermal drilling.
The main question is:
Should there be a single heating system for both units or separate systems for each?
Several people have advised us to choose one heating system for both units, while others recommend keeping them separate.
Therefore, we are very interested in your opinions and, especially, your experiences.
Currently, we have no idea how much the price difference would be between the two options.
Additionally, it is important for us to be able to continue using the unit for her parents.
As we do not have children yet, we would like to possibly rent out the unit later on.
At that point, we will need to be able to clearly separate the energy consumption without requiring a major renovation...
Thank you very much in advance for your opinions and input 🙂
My wife and I are currently planning a new build together with her parents.
It will be a bungalow with two adjacent residential units (total living area approximately 250 m² (2690 sq ft)).
As beginners in planning, we are now facing some questions that are quite challenging for us, and we are unsure what would be the best solution in the end.
One of these questions is how to design the heating system:
So far, the plan is to use a heat pump with geothermal drilling.
The main question is:
Should there be a single heating system for both units or separate systems for each?
Several people have advised us to choose one heating system for both units, while others recommend keeping them separate.
Therefore, we are very interested in your opinions and, especially, your experiences.
Currently, we have no idea how much the price difference would be between the two options.
Additionally, it is important for us to be able to continue using the unit for her parents.
As we do not have children yet, we would like to possibly rent out the unit later on.
At that point, we will need to be able to clearly separate the energy consumption without requiring a major renovation...
Thank you very much in advance for your opinions and input 🙂
H
Hausbau_Laien30 Jun 2023 18:46Thank you very much for the advisory and legal information.
Many friends, acquaintances, and even family members laughed at us when we said that we needed to clarify various things in writing with a lawyer before starting construction.
In a project like this, we simply owe it to each other to do so.
And just because we are dealing with these issues doesn’t mean that the problem will actually occur...
Regarding the heating room in the condominium ownership, I have a rather unusual idea:
Would it be possible to install everything up in the attic?
Both parties could access it through floor hatches.
Of course, there are probably some considerations regarding climate (insulation, etc.)...
Could you perhaps briefly explain why geothermal energy has high fixed costs?
Many friends, acquaintances, and even family members laughed at us when we said that we needed to clarify various things in writing with a lawyer before starting construction.
In a project like this, we simply owe it to each other to do so.
And just because we are dealing with these issues doesn’t mean that the problem will actually occur...
WilderSueden schrieb:
Even special assets of an owners’ association can be easily sold. The problem with this setup is that you may end up in legal frameworks that are more applicable to an apartment building with 30 flats than to a duplex.
If you stick with a condominium ownership (WEG), I would tend to go for a heating system billed based on heat meters. Geothermal energy has relatively high fixed costs and usually doesn’t pay off for a single residential unit with today’s new build standards. With two units, it becomes significantly more viable. A potential issue might be where the heating room is located and how both parties have access to it. As mentioned, the topic of owners’ associations mainly applies to multi-family buildings.
In terms of cost, you will definitely be cheaper with a single heating system serving two units. A heat pump (whether air or geothermal) is not twice as expensive for double the capacity.
Regarding the heating room in the condominium ownership, I have a rather unusual idea:
Would it be possible to install everything up in the attic?
Both parties could access it through floor hatches.
Of course, there are probably some considerations regarding climate (insulation, etc.)...
Could you perhaps briefly explain why geothermal energy has high fixed costs?
Hausbau_Laien schrieb:
Regarding the heating room in a multi-owner property, I have a somewhat unusual idea:
Would it be possible to place it up in the attic?
Both parties could access it through floor hatches.
Of course, there are certainly some considerations regarding climate (insulation, etc.)...We already discussed the topic of the "heating room" in the attic with @Golfi90 https://www.hausbau-forum.de/threads/gedaemmten-technikraum-fuer-die-gastherme-auf-dem-dachboden-schaffe.32450/, and there was also a—unfortunately now lost—thread where someone and his brother built a semi-detached house with four apartments (including a centrally located technical room at the front). In your other thread, I also linked you the two-party bungalow by @blaupuma.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
W
WilderSueden30 Jun 2023 19:08Hausbau_Laien schrieb:
Could you briefly explain why geothermal energy has high fixed costs?You need a drilling operation, which involves mobilizing drilling equipment, a wheel loader, several truck trailers with containers, and so on. That currently costs around 10,000 (currency). For a standard-sized residential unit, the efficiency gains in heating hardly justify this expense. With two units, you have to drill a few meters deeper, but the equipment convoy only needs to be mobilized once.11ant schrieb:
Please quickly add the completed #Questionnaire https://www.hausbau-forum.de/threads/grundriss-planung-unbedingt-vor-beitrag-erstellung-lesen.11714/ ... before we move even further away from the start of the thread 🙂
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
S
Sunshine38730 Jun 2023 21:03Take a look at the floor plan of Bungalow 8.1.1_2WEH_145_pdf on Team Massivhaus. You can find it on the homepage under “The Houses,” then “Floor Plans,” and then “House with second dwelling unit or granny flat.” If you scale the floor plan and keep the boiler room exactly as shown, you will probably have the best layout for your needs.
Hausbau_Laien schrieb:
A shared heating system for both housing units or separate ones for each? According to condominium law, it would be a two-family house, not a semi-detached house.
Hausbau_Laien schrieb:
Would it be possible to place the whole system upstairs under the roof?
Both parties could access it through floor hatches. No, because fire safety regulations must be followed: each unit must be separated from the other and from the neighbor, which cannot be achieved with conventional floor hatches.
Floor hatches are also unsuitable for routing technical installations to the connection point.
By the way, I am not in favor of accessing a technical room only through a floor hatch or fold-down ladder, as it would require frequent access to that room.
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