We are currently building a single-family house (Pinneberg, construction company Kage, 119 sqm (1280 sq ft), 40-degree gable roof, no basement) and I am considering a ground source heat pump. The building consultant advised against it because it is too expensive: 13,000 euros more than a conventional gas heating system.
At the moment, we live in a rented semi-detached house (3 people, built in 2008, 130 sqm (1400 sq ft), gas heating) and our gas consumption costs about 60 euros/month = 720 euros/year.
If the heating cost with a ground source heat pump is only half as much (according to the advisor’s rough estimate), then you calculate 13,000 / (0.5 * 720) = 36 years performance factor!!!
Is that correct?
What do you think about the economic efficiency of a ground source heat pump?
PS
Sorry, German is not my best language, please be patient... :-{
At the moment, we live in a rented semi-detached house (3 people, built in 2008, 130 sqm (1400 sq ft), gas heating) and our gas consumption costs about 60 euros/month = 720 euros/year.
If the heating cost with a ground source heat pump is only half as much (according to the advisor’s rough estimate), then you calculate 13,000 / (0.5 * 720) = 36 years performance factor!!!
Is that correct?
What do you think about the economic efficiency of a ground source heat pump?
PS
Sorry, German is not my best language, please be patient... :-{
I would also recommend gas, possibly combined with some solar panels on the roof... we decided on an air-source heat pump because gas is not available here. We looked into geothermal energy, but the drilling costs were so much higher that it absolutely didn’t fit into the budget compared to other heating technologies... unfortunately.
An additional cost of 13k seems high for Pinneberg, but of course this is compared to gas, not compared to an air-to-water heat pump (which is usually the choice homeowners are deciding between). Are these 13k the extra costs that Kage is asking for? If so, you should subtract the cost of the gas connection to the house, which you will save. The BAFA (German funding agency) also provides a grant of about 5k, depending on the specific system, for ground-source heat pumps, which you should deduct as well. And (if you are not planning to install a stove) the chimney sweep is not needed either, which is not only a financial advantage but also a convenience gain. When you take everything into account, the difference is not as large as it initially seems. However, projecting running costs into the future always remains a matter of belief, especially since you have various energy options to choose from.
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