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Additional costs due to incorrect installation of the heating system.

Hello,
My question is as follows:
We built a turnkey new building at a fixed price with a local construction company. We moved into it in September of last year. Already in January, we had problems with our heating system, and in April 2010, it was determined that this type of heating system does not work for us. Our heating system is a groundwater heat pump, where the water is used to extract residual heat. However, because our water is high in iron, the rust particles clog everything up and the well overflows.
This could have been easily detected before the drilling work began through a water sample, but the drilling company neglected to do so because it is very costly, and there are already 2 functioning systems of the same type and from the same company in the area. However, there was also a failed system from the same company in the area.

Now, the drilling company is offering us, or rather our construction manager, a deep drilling with a brine circulation pump, and we are expected to cover the additional costs for the increased drilling depth of 7000 euros. Our construction manager has already negotiated it down to 2500 euros. My question now is, who is responsible for covering the costs. Since it is partly a failure of the water sample, and on the other hand, it is a turnkey construction, albeit with a different heating system.
Is it us, our construction manager, or the drilling company?
I would appreciate a response.

Bernhard Müller

Dear inquirer,

It depends. If you ordered a groundwater heating system without consultation and it cannot function at the location of your building, then you are responsible for the additional costs incurred. This is because the ordered service has been provided. If you had received advice from the construction company and they recommended the groundwater heating system without mentioning that it would not work with water high in iron content and that this could only be determined through a water sample, then there is a consultation error and the company must compensate you as if they had advised you correctly. With the right advice, you would probably have ordered a deep borehole with a brine circulation pump and would have had to pay the price for it. If the groundwater heating system cost X euros, the subsequent installation of the deep borehole with brine circulation pump costs 4,500 euros (7,000 - the negotiated 2,500 = 4,500), and it would have cost x+y euros to do the deep borehole installation initially, you must pay Y euros and the construction company, which provided incorrect advice, must pay 4,500 - Y euros. The extent of the advice owed can only be determined by a colleague on-site who must read through all completed contracts.

Best regards,

Bernhard Müller Attorney

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Bernhard Müller

Bernhard Müller

Berlin

Bernhard Müller ist seit April 2004 als Einzelanwalt tätig. Wer Streit mit seinem Vermieter hat, etwas erbt, vererben will, sich scheiden lassen will, wer Ärger mit der Polizei oder sonst ein rechtliches Problem hat, findet bei Rechtsanwalt Bernhard Müller kompetente Beratung. Im Jahr 2009 hat er 2 mal hintereinander den Jusline Kommentierwettbewerb gewonnen.

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