Hello, we are quite confused and hope you can help us. The developer Aktuell Bau wants to install a 180m2 (1,937 sq ft) large collector field with 8 external loops for extracting geothermal energy using ground collectors. Our living area is also 180m2 (1,937 sq ft). Everywhere we read and hear that at least 1.5 times the collector area is required. However, Aktuell Bau says that due to their highly efficient system from Heliotherm, see link:
it is not necessary, and they will definitely only install 180m2 (1,937 sq ft). What do you think? Is this correct?
Thank you very much for your help!
Best regards, Mareike
it is not necessary, and they will definitely only install 180m2 (1,937 sq ft). What do you think? Is this correct?
Thank you very much for your help!
Best regards, Mareike
We have our underfloor heating system with surface collectors serviced every year. The cost per maintenance is 170€ gross.
In the first year, there was too little coolant in the system, so only part of the surface was used. This caused significant lifting and sinking. I estimate that the entire surface was raised by about 20 to 30 cm (8 to 12 inches) and then sank again in spring. Last winter, I could not observe any visible lifting or sinking.
Especially in spring, you can notice that growth is somewhat delayed. Snow remains on the grass longer, and everything grows a bit later. I estimate this delay to be around 14 days to 3 weeks in spring. One advantage is that you don’t need to take out the lawn mower as early.
In the first year, there was too little coolant in the system, so only part of the surface was used. This caused significant lifting and sinking. I estimate that the entire surface was raised by about 20 to 30 cm (8 to 12 inches) and then sank again in spring. Last winter, I could not observe any visible lifting or sinking.
Especially in spring, you can notice that growth is somewhat delayed. Snow remains on the grass longer, and everything grows a bit later. I estimate this delay to be around 14 days to 3 weeks in spring. One advantage is that you don’t need to take out the lawn mower as early.
C
Carsten-le25 Nov 2016 14:08You are having the maintenance done, ok, but does a leak test really need to be carried out?
I have read that the ground under your house has lifted by 20-30cm (8-12 inches), which I find quite significant. But that was apparently due to the missing refrigerant. Did the heating company cover the cost for that themselves? I believe you also have a heat pump from Heliotherm, right?
I have read that the ground under your house has lifted by 20-30cm (8-12 inches), which I find quite significant. But that was apparently due to the missing refrigerant. Did the heating company cover the cost for that themselves? I believe you also have a heat pump from Heliotherm, right?
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