Trench collector brine-water heat pump or air-water heat pump?

The certification matters are all in the documents – it also says that as the builder you have to have such insurance. Not the drilling company, which already has something like that...

My drilling company is currently checking this with their insurance and will let me know.

The note is nice, but you have to specify the exact pump, etc. – how is that supposed to work if the data isn’t even properly known? How do they want to approve an application if it’s not even certain that the pump meets the requirements (which it certainly does, but it's an authority after all...)?

I will request a written response again.

I consider a new pump from a good manufacturer to be rather unproblematic – technically the parts are quite simply constructed.

Okay, then take out insurance through the drilling company - maybe that was it. Our drilling company, for example, only has the WS120... on their website, not the WS120-2... we now need to ask again. It's all a bit annoying since the plumber/heating specialist was supposed to install a few pipes already at the base plate...

Hello. If the subsidy is now included in the profitability comparison excl. follow-up costs (electricity), is there still a difference compared to an air-water heat pump?

Not to say in general - in my opinion, the brine-water heat pump has already been cost-effective compared to the air-water heat pump... at least over the duration of the drilling.

What has become of all the brine-water heat pumps here? Can you share your experiences and annual performance factor?

I thought the air pump was fixed for you? The annual performance factor with brine will ALWAYS be better than with air pumps - that's the nature of the thing.

I would even go so far as to say that this type is always preferable to any other heat pump - if it weren't for the expensive drilling. You have to decide that for yourself, but with the drilling, you don't have to worry about freezing of the garden soil or problems in the deepest winter.