ᐅ Heating System for New Construction – Which Is the Best Option?
Created on: 7 Oct 2017 20:33
F
FlohJoe
Hello,
starting next week, I will be building a single-family house of 180 m² (1,938 sq ft). Many details have already been finalized, but I keep changing my mind about the type of heating. Initially, I was convinced to go with a gas condensing boiler combined with tube collectors. Then I considered an air-to-water heat pump. Now I am leaning towards a pellet heating system. There is also the Vitovalor from Viessmann, which I find interesting—generating electricity myself..
Basically, I want to be as self-sufficient as possible regarding energy supply. So, perhaps an air-to-water heat pump with photovoltaic panels and a water-based fireplace? I’m a bit overwhelmed. Maybe someone here can give me some advice on what is feasible..
Best regards, Florian
starting next week, I will be building a single-family house of 180 m² (1,938 sq ft). Many details have already been finalized, but I keep changing my mind about the type of heating. Initially, I was convinced to go with a gas condensing boiler combined with tube collectors. Then I considered an air-to-water heat pump. Now I am leaning towards a pellet heating system. There is also the Vitovalor from Viessmann, which I find interesting—generating electricity myself..
Basically, I want to be as self-sufficient as possible regarding energy supply. So, perhaps an air-to-water heat pump with photovoltaic panels and a water-based fireplace? I’m a bit overwhelmed. Maybe someone here can give me some advice on what is feasible..
Best regards, Florian
R.Hotzenplotz schrieb:
Do you know where to find geological maps that indicate whether a geothermal heat pump makes sense or not?Yes, there are maps available for NRW. Just search online for "Geothermie NRW." The entire area is divided into classes. From class 4 onwards, it gets tight; above that, it works.
Apart from that, there may be regional restrictions, for example in groundwater protection zones or if the drilling would connect two aquifers, but the Geological Survey or the permitting authority can inform you about these, because:
The geothermal potential can be calculated for the specific site by the Geological Survey NRW for around 200-250€ (euros). No one knows better than them, especially not for such a reasonable cost.
If you also know the heating demand, the required drilling depth can easily be calculated. Everything else is just guesswork.
A drilling meter costs about 50-65€ (euros). Obviously, 100m (330 feet) is more manageable than 300-350m (980-1150 feet), which would be realistic for the assumed 18kW capacity.
R
R.Hotzenplotz24 Oct 2017 19:56Alex85 schrieb:
The entire land there is divided into classes. Starting from 4 it gets tight, above that it works.Only at a drilling depth of 100 meters (330 feet) do you reach class 3c, as far as I can tell.
Just now, an alternative house-building provider was here who said he checked and confirmed that using a geothermal probe there is definitely possible.
W
winnetou7824 Oct 2017 20:00Don’t just get turned away, a villa for 800,000 euros and a gas connection seems strange to me in 2017.
And you can also do several drillings, no problem.
They just aren’t interested because it’s still a niche product.
And you can also do several drillings, no problem.
They just aren’t interested because it’s still a niche product.
R
R.Hotzenplotz24 Oct 2017 20:18winnetou78 schrieb:
And you can also make several drillings, no problem.
They just aren’t interested because it’s still a niche product.I don’t know if they’re just not interested. From the start, they included it in the scope of work on their own. Now they just say you have to go so deep that it becomes uneconomical...
What do you mean by several drillings? Two probes side by side?
Multiple drillings would also cost twice as much. I simply suspect it’s a matter of economics.
R.Hotzenplotz schrieb:
What do you mean by several boreholes? Two probes next to each other? Yes, instead of drilling 100m (330 feet), you can drill 2x 50m (165 feet), but the two boreholes must have a certain distance between them (8m (26 feet) ?!). I don’t remember who said this, but someone in our area (Bavaria) mentioned that drilling deeper than 100m (330 feet) is generally not allowed in Bavaria... no idea if that’s true, but in that case, you’d have to make several boreholes. For 300m (990 feet), for example, 4x 75m (246 feet) or something like that.
R
R.Hotzenplotz24 Oct 2017 23:36A borehole costs 10,000 to 15,000