Experiences with brine heat pump

Sorry, I am now a bit confused myself: Regarding above: 4.8 kW is the guaranteed cooling capacity – is this then also the total capacity of the probe? Regarding point 5: this has been clarified: the expert is already included in the offer.

The total capacity of the probe is approximately 80% of the selected heat pump's capacity.

- Disposal of drilling mud, if not possible via sewer (flat rate +500 euros)

Rather expensive.

- Backfill material is standard with thermal conductivity of about 1 watt :-(

Bad.

- Bureaucratic processing etc. is all included.

Normal.

As said: about 15,000 euros for 4.8 kW (guaranteed). What do you think?

Abandon the project, it's not worth it. And I say this as a geothermal fan.

Abandoning the project is not worthwhile. And I say this as a geothermal energy fan.

Phew, clear statement.

He is right about that.

Unfortunately, there is no room to negotiate the price any further. Our system roughly cost half that amount, with a drilling depth of 120m (one borehole). 15,000€ was also offered once, but that was an all-in offer from a heating contractor who would have had a subcontractor for the drilling and knew nothing about the location and drilling depth during the offer phase. So it was calculated with a large safety margin (for him).

Unfortunately, the pricing no longer allows for much wiggle room. Our system roughly cost half at 120m drilling depth (one borehole)

May I ask where your system is located? I have compared my offer with some other acquaintances and here in the south they always came out around this value like mine: about €13,000-14,500 all in. Is it because of the region? I have heard that the further south, the more expensive it gets...

May I ask where your system is located? I compared my offer with some other acquaintances and here in the south they always came out around this value like mine: approx. €13,000-14,500 all in. Is that due to the region? I've heard the further south you go, the more expensive it gets...

NRW. Sure, the south is more expensive and the subsoil will play a role. But even if the offer is reasonable under these circumstances, it no longer makes any economic sense. Then you’d better get an air-to-water heat pump. You’ll never recoup the thousands of euros extra cost of the drilling with the lower consumption.