ᐅ Which Heat Pump? Ventilation System / Air-to-Water Heat Pump

Created on: 17 Aug 2016 20:27
M
Maderl
Hello,
My husband and I are currently trying to decide which heating system to install in our planned house.
I insist on having a ventilation system and a wood-burning stove in the living room. So the heating should be compatible with these.
Our chosen construction company has now offered us three heat pumps:

Air-to-water heat pump: Nibe F2040-8 with Nibe VVM320
Exhaust air heat pump: Nibe F750 P with supply air module SAM 40
Ground source heat pump: Nibe 1245-6 with deep drilling

My husband currently prefers the exhaust air heat pump because he thinks it works like the air-to-water heat pump but makes better use of the warm air from running computers... Everywhere I read, though, it says: "Avoid exhaust air heat pumps unless you are building a passive house."
Does the supply air module actually make it function somewhat like an air-to-water heat pump, but with better use of the warm indoor air?

The house is planned as a two-story timber frame construction with KfW 55 standard. To be honest, I am completely overwhelmed by this complicated heating topic. The more information I get, the more complex it seems.
S
Saruss
18 Oct 2016 14:21
In general, groundwater pumps depend on the type of groundwater available, meaning how suitable it is (maintenance costs) or whether it is feasible at all. Then, you need to obtain a building permit / planning permission.

Efficiency and initial costs are reasonable if the conditions mentioned above are met.
C
Carsten-le
18 Oct 2016 16:14
Is it necessary or at least recommended to have a test drilling done to directly check the actual water quality and flow rate? I once read about this, but 2-3 thousand euros for it is quite a lot. Of course, the hole can then be used for one of the two wells, but it could also turn out that using a groundwater heat pump is not advisable...
S
Saruss
18 Oct 2016 20:03
It can also happen with a geothermal drilling that the drilling does not succeed (e.g., cavities that prevent grouting or similar issues).
C
Carsten-le
18 Oct 2016 20:30
But there, it is even more expensive, or the financial loss due to deeper drilling is even greater.
Is something like this very rare, or does it happen fairly often?