Lückenfüller
2018-04-23 17:42:34
- #1
Since our previously planned heating system (brine heat pump) literally fell through (requirements from the environmental authority for the groundwater protection area IIIa), we are looking for alternatives but are still not clear about the ideas.
Here are a few frame data:
- The new building will have about 390sqm (14x14m, two apartments per full floor, two smaller apartments on the staggered floor).
- We have to build KfW55 (requirement from the city).
- Heating load estimated about 16,000W/a
- Controlled residential ventilation planned
We therefore see three alternatives:
- Gas & solar thermal: It will be very tricky to get this approved as a KfW55 house. Needs to be calculated more precisely. Otherwise, it seems very attractive to us.
- Air-water heat pump: The warm area at the Rhine speaks in favor of this, which promises only little electric supplementary heating in winter. Against it, for us, is the bulky unit in the (front) garden, especially with the above-mentioned amount of energy. Does anyone of you have experience with air-water heat pumps for this scale, possibly also for indoor installation?
- Well heat pump: Would be possible despite the groundwater protection area, but an expert wants 750€ for the test drilling to be able to make informed statements.
- Trench collector is out, as the plot is too small for it.
What would you advise us?
Here are a few frame data:
- The new building will have about 390sqm (14x14m, two apartments per full floor, two smaller apartments on the staggered floor).
- We have to build KfW55 (requirement from the city).
- Heating load estimated about 16,000W/a
- Controlled residential ventilation planned
We therefore see three alternatives:
- Gas & solar thermal: It will be very tricky to get this approved as a KfW55 house. Needs to be calculated more precisely. Otherwise, it seems very attractive to us.
- Air-water heat pump: The warm area at the Rhine speaks in favor of this, which promises only little electric supplementary heating in winter. Against it, for us, is the bulky unit in the (front) garden, especially with the above-mentioned amount of energy. Does anyone of you have experience with air-water heat pumps for this scale, possibly also for indoor installation?
- Well heat pump: Would be possible despite the groundwater protection area, but an expert wants 750€ for the test drilling to be able to make informed statements.
- Trench collector is out, as the plot is too small for it.
What would you advise us?