ᐅ Trench collector for brine heat pumps

Created on: 22 Sep 2017 13:18
Z
Zaba12
Hello everyone,

I have always been keen on an air-to-water heat pump combined with a central ventilation system, for example, the Stiebel Eltron LWZ 504.

But what is your opinion if both options were possible (there seems to be hardly any price difference, especially due to subsidies)? Which option would you choose?

A trench collector for a brine-to-water heat pump plus central ventilation, or the above-mentioned air-to-water heat pump plus central ventilation as a combined unit?
Z
Zaba12
22 Sep 2017 18:15
Just read it. That explains the low costs. There you have it. Without personal labor, it’s not cost-neutral :-(
W
winnetou78
22 Sep 2017 18:21
Most companies also told me about an additional cost of 16,000 or more, just because they don't want to deal with it.
With everything included, it is now costing me about 800 euros (around $860) more than gas.
Of course, this calculation only includes the 5,000 euro (about $5,400) BAFA subsidy.
Z
Zaba12
22 Sep 2017 18:31
winnetou78 schrieb:
Most companies also told me about an additional cost of 16,000 or more, just because they’re not interested in doing it.
With everything included, it now costs me almost 800 euros (about 860 USD) more than gas.
This, of course, only considering the 5,000 euro (about 5,400 USD) government subsidy.

Could you please list the cost items roughly, so I get an idea of the price? Which brine heat pump model did you choose?
W
winnetou78
22 Sep 2017 18:40
Vaillant Flexotherm,

Additional cost for geothermal heat pump with drilling: 6800 euros,
Bafa subsidy: 5000 euros,
Gas connection saved: 1200 euros,
200 euros paid for permit from the local water authority
W
winnetou78
22 Sep 2017 18:44
There were also companies that wanted 9,000 for the drilling.
Z
Zaba12
22 Sep 2017 18:53
A trench collector doesn’t require drilling, right? Do you only need to dig a trench up to 2m (6.5 feet) deep?