ᐅ Alternatives to Outdoor Installation of an Air Source Heat Pump
Created on: 12 Jan 2022 17:45
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ConnyJash
Hello dear house building forum,
We are building a KFW55 semi-detached house with approximately 150m² (1,615 sq ft) of living space. The project is being carried out with a general contractor. During planning, it turned out that the proposed location for the air source heat pump (behind the garage, at the neighbor’s property line) is not allowed because:
Our general contractor has suggested the following options:
ConnyJash
We are building a KFW55 semi-detached house with approximately 150m² (1,615 sq ft) of living space. The project is being carried out with a general contractor. During planning, it turned out that the proposed location for the air source heat pump (behind the garage, at the neighbor’s property line) is not allowed because:
- The location is behind the building boundary line
- The required setback of 3m (10 feet) from the neighboring property is not met
Our general contractor has suggested the following options:
- Ground source heat pump, with additional costs of at least 15,000 EUR
- Exhaust air heat pump, probably no additional costs
- Where can I find reliable information about alternatives to outdoor installation of an air source heat pump? Which organizations or professionals could provide expert advice (possibly for a fee)?
- What is the difference between an air source heat pump and an exhaust air heat pump?
- Is an exhaust air heat pump even suitable for a KFW55 house?
ConnyJash
KingJulien20 Jan 2022 12:01Someone wrote here recently. Stiebel Eltron or their subsidiary brand Tecalor offer a wide range of combined units. They are also efficient to operate; I have actually only read good things about them.
However, I think the builder will not easily switch from their usual, trusted brand.
However, I think the builder will not easily switch from their usual, trusted brand.
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ConnyJash20 Jan 2022 14:00@hanse987: The utility room is located at the front right. Size approximately 5.5m² (59 ft²).
@kati1337: I will check out the device and blog. Then I can see if my utility room is large enough.
@face26: Front is excluded. Utility room at the front right.
@Tolentino: Taking legal action against the city is not an option for us. We would like to start promptly.
@Mycraft: Thanks for the picture. I still haven’t understood where I’m supposed to hang the pump? As mentioned, the back wall has the children’s rooms with floor-to-ceiling windows. Hanging the unit there doesn’t seem ideal.
Where could I get independent advice again regarding indoor installation, specifically about the Nibe (F750) unit, whether indoor installation is really nonsense?
@kati1337: I will check out the device and blog. Then I can see if my utility room is large enough.
@face26: Front is excluded. Utility room at the front right.
@Tolentino: Taking legal action against the city is not an option for us. We would like to start promptly.
@Mycraft: Thanks for the picture. I still haven’t understood where I’m supposed to hang the pump? As mentioned, the back wall has the children’s rooms with floor-to-ceiling windows. Hanging the unit there doesn’t seem ideal.
Where could I get independent advice again regarding indoor installation, specifically about the Nibe (F750) unit, whether indoor installation is really nonsense?
ConnyJash schrieb:
@face26: Front excluded. Utility room front right. Sorry, I missed that.
ConnyJash schrieb:
Where could I get independent advice again on indoor installation, specifically regarding the Nibe (F750) unit, whether indoor installation is actually nonsense? Wait, don’t mix things up.
I’m not familiar with Nibe, but isn’t the F750 an exhaust air heat pump?
Indoor installation is not inherently related to exhaust air heat pumps.
When I (or others) talk about indoor installation, we mean a standard air-to-water heat pump. The difference is that there is no outdoor unit, but it is integrated into a single compact indoor unit. For that, you need two wall openings: supply air and exhaust air. Ideally, these should be around the corner of the house (to avoid thermal short-circuiting) or the air ducting needs to be adjusted.
You should also pay attention to noise when installing. Since the whole unit is inside, make sure to decouple it properly, and so on.
Edit: I just saw the utility room is 5.5m² (59ft²). What else is supposed to fit in there? :-O That’s really quite small.
Then the only real option left is the indoor installation of an air-to-water heat pump, not an exhaust air heat pump!
It looks something like this, and you will need more space in the utility room as well as slightly larger ventilation ducts and openings in the exterior wall to allow for air circulation.
It looks something like this, and you will need more space in the utility room as well as slightly larger ventilation ducts and openings in the exterior wall to allow for air circulation.
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