ᐅ Trench Collector Ground Source Heat Pump or Air Source Heat Pump?
Created on: 1 Mar 2015 10:25
L
Legurit
Hello everyone,
We had our first meeting with the builder yesterday. He quickly dismissed the heating topic since there is no gas connection but gave us some contact addresses.
The house has roughly 190 m² (2,045 sq ft) of living space and a heating demand of 6,600 kWh/year, or about 6 kW heating load.
So far, we have planned to install a ground-source heat pump with a horizontal collector, but the builder rightly pointed out that he would prefer some maneuvering space around the house. In the pink forum, there is a community advocating for DIY horizontal collectors, saying that the trenches including materials could be done for around €2,000. Including the heat pump gross price of €10,000, that would be €12,000 total. An air-source heat pump would cost at least that much for the unit alone.
Unfortunately, we are already a bit overwhelmed with the house planning and are not sure if we would trust ourselves to do the DIY installation. Does anyone have experience with the costs when contracting out the trenching and pipe laying?
As for consumption, we found a factor of about 1.5. So the air-source heat pump would be around 50% more expensive to operate than the ground-source heat pump, but we wouldn’t have to dig (in absolute terms, about €180 per year). We are also unsure whether having a photovoltaic system would be beneficial or not (we are skeptical).
Thanks for your experiences and advice.
We had our first meeting with the builder yesterday. He quickly dismissed the heating topic since there is no gas connection but gave us some contact addresses.
The house has roughly 190 m² (2,045 sq ft) of living space and a heating demand of 6,600 kWh/year, or about 6 kW heating load.
So far, we have planned to install a ground-source heat pump with a horizontal collector, but the builder rightly pointed out that he would prefer some maneuvering space around the house. In the pink forum, there is a community advocating for DIY horizontal collectors, saying that the trenches including materials could be done for around €2,000. Including the heat pump gross price of €10,000, that would be €12,000 total. An air-source heat pump would cost at least that much for the unit alone.
Unfortunately, we are already a bit overwhelmed with the house planning and are not sure if we would trust ourselves to do the DIY installation. Does anyone have experience with the costs when contracting out the trenching and pipe laying?
As for consumption, we found a factor of about 1.5. So the air-source heat pump would be around 50% more expensive to operate than the ground-source heat pump, but we wouldn’t have to dig (in absolute terms, about €180 per year). We are also unsure whether having a photovoltaic system would be beneficial or not (we are skeptical).
Thanks for your experiences and advice.
S
Sebastian798 Mar 2015 15:54Per kW? Bore meters are usually billed...?
Lexmaul79 schrieb:
What is included in the costs? The entire heating system including underfloor heating? Haha, that was good. No, unfortunately not, this is ONLY the heating system including the connection. Nothing else. Underfloor heating plus plumbing is extra on top.
Hard to compare – but 23,000 euros is rather expensive, isn’t it? As mentioned, we have a "quote" of 8,000 euros for the drilling plus an additional amount for the heating (although brine-water heat pumps are not usually that expensive – we were told to expect around 8,000 to 10,000 euros).
However, the drilling cost really depends on the specific conditions.
However, the drilling cost really depends on the specific conditions.
Lexmaul79 schrieb:
What is included in the costs? The complete heating system including underfloor heating?We paid 17,000 euros for the Vaillant geotherm heat pump, the ground collectors, and all the work (earthworks, installation, connection) for a single-family house of 160 m² (1,720 sq ft) with heavy soil.
Drilling often ends up being more expensive than initially quoted—trial drillings, then hitting an obstacle like a boulder where the drill can’t pass, meaning the required depth isn’t reached and additional drillings are needed (this was at least the case with my neighbor).
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