Hello everyone,
I would like to get your feedback on our offer for the heat pump and also your thoughts on groundwater heat pumps in general.
We are currently planning to use groundwater as the heat source and have received the following offer. It includes the complete installation of the underfloor heating, connection of the heat pump, etc. Only the drilling for the two wells would be an additional cost.
Water-water heat pump Ochsner GMWW 11 plus
Ochsner buffer tank PU800
Ochsner domestic hot water module
230 sqm (2,475 sq ft) underfloor heating including insulation
Various small components such as room thermostats, etc.
The total price is €30,100 gross.
What do you think? Is this a good offer? Is a groundwater heat pump a sensible choice?
I would like to get your feedback on our offer for the heat pump and also your thoughts on groundwater heat pumps in general.
We are currently planning to use groundwater as the heat source and have received the following offer. It includes the complete installation of the underfloor heating, connection of the heat pump, etc. Only the drilling for the two wells would be an additional cost.
Water-water heat pump Ochsner GMWW 11 plus
Ochsner buffer tank PU800
Ochsner domestic hot water module
230 sqm (2,475 sq ft) underfloor heating including insulation
Various small components such as room thermostats, etc.
The total price is €30,100 gross.
What do you think? Is this a good offer? Is a groundwater heat pump a sensible choice?
N
neubau201930 Aug 2019 16:44guckuck2 schrieb:
Heat pump one size smaller
Storage tank at a normal level
Fresh water station then unnecessary. I will pass this on to my heating engineer and see what he says...
boxandroof schrieb:
From my point of view, it is more important to ensure that there is no buffer tank installed in the heating circuit, that the underfloor heating is well designed, and that the heat pump is not oversized. If possible, circulation should also be avoided. Thanks for the advice, I will keep that in mind.
boxandroof schrieb:
Regarding the lift principle: I don’t know if this is a common option offered by manufacturers or heating installers or not; other forums provide more expertise on this. In any case, it does not seem to be planned. This is referring only to infiltration, not the suction well. But it is true, very few offer the lift principle.
N
neubau201930 Aug 2019 16:57What do you think about the annual costs compared to an air-to-water heat pump?
I mean, how does the better efficiency of the geothermal heat pump affect consumption and costs in euros compared to an air-to-water heat pump?
I mean, how does the better efficiency of the geothermal heat pump affect consumption and costs in euros compared to an air-to-water heat pump?
B
boxandroof30 Aug 2019 20:54Maybe a difference of 150-300€ per year, depending on the heating demand of the house and its location. With poor planning, the difference can be zero or even negative.
A well-planned air-to-water heat pump can come close to an average ground-source heat pump. Monitor the planning carefully. For ground-source heat pumps, don’t forget the BAFA subsidy.
A well-planned air-to-water heat pump can come close to an average ground-source heat pump. Monitor the planning carefully. For ground-source heat pumps, don’t forget the BAFA subsidy.
The annual performance factor (seasonal coefficient of performance) of an air-to-water heat pump may be around 4, while that of a groundwater heat pump is 5.5 to 6.
This means approximately 40-50% lower operating costs. And a 12m (39 feet) well at 250€ per meter is practically a bargain. The subsidy (BAFA) clearly exceeds the costs of developing the heat source.
This means approximately 40-50% lower operating costs. And a 12m (39 feet) well at 250€ per meter is practically a bargain. The subsidy (BAFA) clearly exceeds the costs of developing the heat source.
N
neubau201931 Aug 2019 17:45guckuck2 schrieb:
And a 12m (39 feet) well at €250 per meter is practically a bargain. The subsidy (BAFA) clearly exceeds the costs of developing the heat source. Unfortunately not entirely, around €3000 in additional costs will remain, including the inspector and permits/planning permission etc.
What do you think about passive cooling, is it practical or just a gimmick?
I have some concerns about condensation...
neubau2019 schrieb:
Unfortunately not entirely, there will be around 3000 € extra costs remaining, including the surveyor and permits / building permission.
What do you think about passive cooling, is it useful or just a gimmick?
I have some concerns about condensation...Nonsense, go for it. I have an active air-to-water heat pump, it’s great.