Hello everyone!
We are currently considering what and how we want to build. It’s about a new build that will be constructed by a developer. At the moment, a 36cm (14 inch) Ytong exterior wall is being offered. I would like to replace the standard heating system—a gas burner with radiators—with a heat pump and underfloor heating throughout the house, completely eliminating the need for a gas connection.
I don’t really want to use an air-source heat pump because I don’t want the noise or the unit in the garden, and I’m not thrilled about the decreasing efficiency during the cold season.
However, I have a few questions about the design and implementation. First, I have no idea how much more expensive ground source heat pumps are compared to air-source heat pumps. Do you have any rough estimates? I would prefer to use ground probes, meaning boreholes, since I consider that the most reliable method.
But what happens if there is damage to the system? A technician can simply open up and repair an air-source heat pump. However, no one would want to dig up the ground probes, right?
Also, how much space is needed for something like this? I was thinking the boreholes could be made in front of the house—that is, between the house and the sidewalk. There’s only about 3–5 meters (10–16 feet) of space there. If someone needs to access the pipes, you would have to remove the paving. I won’t be able to bring in heavy machinery to the garden later on.
To increase the efficiency of the system in the long run, I would also like to add photovoltaic panels later, but that would have to wait a few years due to cost and planning reasons.
Thank you for your help!
We are currently considering what and how we want to build. It’s about a new build that will be constructed by a developer. At the moment, a 36cm (14 inch) Ytong exterior wall is being offered. I would like to replace the standard heating system—a gas burner with radiators—with a heat pump and underfloor heating throughout the house, completely eliminating the need for a gas connection.
I don’t really want to use an air-source heat pump because I don’t want the noise or the unit in the garden, and I’m not thrilled about the decreasing efficiency during the cold season.
However, I have a few questions about the design and implementation. First, I have no idea how much more expensive ground source heat pumps are compared to air-source heat pumps. Do you have any rough estimates? I would prefer to use ground probes, meaning boreholes, since I consider that the most reliable method.
But what happens if there is damage to the system? A technician can simply open up and repair an air-source heat pump. However, no one would want to dig up the ground probes, right?
Also, how much space is needed for something like this? I was thinking the boreholes could be made in front of the house—that is, between the house and the sidewalk. There’s only about 3–5 meters (10–16 feet) of space there. If someone needs to access the pipes, you would have to remove the paving. I won’t be able to bring in heavy machinery to the garden later on.
To increase the efficiency of the system in the long run, I would also like to add photovoltaic panels later, but that would have to wait a few years due to cost and planning reasons.
Thank you for your help!
B
Bauexperte22 Jul 2015 18:35SirSydom schrieb:
But maybe solar was excluded there.. I would tend to guess that; solar really doesn’t make any sense with an air-to-water heat pump.
PS: really true
Best regards, Bauexperte
Bauexperte schrieb:
If you want to build a true Passive House (PH), then yes. The alternative is an air-to-water heat pump (air-to-water heat pump). We have been installing these for years; they should be available at a price comparable to a gas condensing boiler with solar water heating.
Regards, BauexperteAt a recent trade fair, a representative from Buderus recommended going with gas because the initial purchase price is cheaper, and you can also support water heating with solar.
Then I told him I would also like to have a fireplace as an additional heating source, and he said there are also stoves with a water storage tank that feed the heated water into the heating circuit to further support the system. Although you have to consider how often you actually use the fireplace since it should only serve as emergency heating.
Overall, a gas heating system is generally cheaper in terms of initial costs compared to an air-to-water heat pump.
However, these essential heating systems are also heavily dependent on the price of energy resources; it is quite possible that the raw material price for gas could rise dramatically at some point.
I always say you need to heat anyway, whether with gas, oil, electricity, or something else.
We paid €9,290 for two 70-meter (230 feet) boreholes. Additionally, the heating system cost €11,000. Hopefully, we will get back €4,500 through the BAFA subsidy.
Would I do it again? Probably not... It was too exhausting for me. However, it’s not much more expensive than gas. A gas condensing boiler would also cost around €5,000 including installation and related expenses, a connection fee of €2,500, and solar thermal panels on the roof for about €5,000 (?).
Would I do it again? Probably not... It was too exhausting for me. However, it’s not much more expensive than gas. A gas condensing boiler would also cost around €5,000 including installation and related expenses, a connection fee of €2,500, and solar thermal panels on the roof for about €5,000 (?).
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