Hello,
we are planning a prefabricated house with 140 m² (1,507 sq ft) of living space and are still unsure which heating system to choose.
The house will be built in the Ulm area on a slab-on-grade foundation. Therefore, only a relatively small utility room is available.
We are moving away from the ground source heat pump because we have read quite a lot of negative things about it.
What are your experiences? Also regarding the price?
we are planning a prefabricated house with 140 m² (1,507 sq ft) of living space and are still unsure which heating system to choose.
The house will be built in the Ulm area on a slab-on-grade foundation. Therefore, only a relatively small utility room is available.
We are moving away from the ground source heat pump because we have read quite a lot of negative things about it.
What are your experiences? Also regarding the price?
Hello,
When I think about the "why," I rarely arrive at 19??
Back when I knew nothing in Germany… so long ago!?!
Where the devices were developed is also irrelevant.
And the conditions today are certainly different.
Explain to those who don’t have time for a language course
why I should cut holes into an airtight and windproof building,
why I should use the building as a heat source for a heat pump.
Olli
When I think about the "why," I rarely arrive at 19??
Back when I knew nothing in Germany… so long ago!?!
Where the devices were developed is also irrelevant.
And the conditions today are certainly different.
Explain to those who don’t have time for a language course
why I should cut holes into an airtight and windproof building,
why I should use the building as a heat source for a heat pump.
Olli
Mycraft schrieb:
Well, I still prefer gas condensing boilers and nothing else...I don’t understand all these calculations! With an air-to-water heat pump, you don’t need a chimney flue (about €3000 (around $3300)) or a chimney sweep, and you also save quite a bit on heating costs annually thanks to special heat pump electricity tariffs. So after 7 to 10 years, you easily make back the difference and end up saving compared to a gas boiler, even without considering possible future gas price increases!?
WT1987 schrieb:
You can also save quite a bit on heating costs with heat pump electricity tariffs You might save a few cents per kWh, but that doesn’t necessarily translate into heating cost savings if you are heating with a condensing gas boiler instead.
According to forum consensus, a modern average-sized house currently incurs around EUR 50.00 per month in heating costs. If consumption drops by 10% for an additional investment of, for example, EUR 1000, the investment pays off after at least 17 years (not taking into account additional financing costs, etc.)...
WT1987 schrieb:
then it heats at a profit compared to the gas boiler, without considering the possible increase in gas prices!? Predicting the future development of electricity and gas prices is just guesswork. It’s not only gas prices that can rise!
Yes, the fact is that with a heat pump you save the following costs!
That means I save approximately 6300€ just on the initial investment compared to gas, not including the savings on energy consumption. So, it doesn’t take 17 years for it to pay off!
- Chimney installation about 3000€
- Gas connection about 2500€
- Chimney sweep about 800€ over 10 years
That means I save approximately 6300€ just on the initial investment compared to gas, not including the savings on energy consumption. So, it doesn’t take 17 years for it to pay off!
You mentioned that the air-to-water heat pump only pays off after 7-10 years.
I cannot judge whether the numbers you provided for your project reflect reality, as prices vary widely.
I only pointed out that savings in heating and primary energy do not necessarily translate into significantly lower heating costs that justify the additional investment.
However, it is quite clear that many people calculate their preferred heating system to show a positive return. The same applies to your numbers above. I doubt that your heat pump can be operated maintenance-free for 10 years, so you will likely incur additional costs to some extent. To my knowledge, an efficient air-to-water heat pump is more expensive than a gas condensing boiler, which then reduces the savings for the gas connection and so on.
Whether you save money with an electric heating system compared to gas strongly depends on the insulation and location of your building. An air-to-water heat pump is not suitable for every house...
Due to the changed framework conditions since April 1, 2016, however, there are many arguments in favor of a heat pump.
I cannot judge whether the numbers you provided for your project reflect reality, as prices vary widely.
I only pointed out that savings in heating and primary energy do not necessarily translate into significantly lower heating costs that justify the additional investment.
However, it is quite clear that many people calculate their preferred heating system to show a positive return. The same applies to your numbers above. I doubt that your heat pump can be operated maintenance-free for 10 years, so you will likely incur additional costs to some extent. To my knowledge, an efficient air-to-water heat pump is more expensive than a gas condensing boiler, which then reduces the savings for the gas connection and so on.
Whether you save money with an electric heating system compared to gas strongly depends on the insulation and location of your building. An air-to-water heat pump is not suitable for every house...
Due to the changed framework conditions since April 1, 2016, however, there are many arguments in favor of a heat pump.
oleda222 schrieb:
It is quite clear that many people calculate their preferred heating system in a way that suits them, just like you did with your numbers above. I doubt that your heat pump can operate maintenance-free for 10 years, so you will incur at least some additional costs there. To my knowledge, an efficient air-to-water heat pump is more expensive than a gas condensing boiler, which then eats up savings on the gas connection and so on.
Whether you save money with an electrically powered heating system compared to gas strongly depends on the insulation and location of your building. An air-to-water heat pump is not suitable for every house... I would like to partially disagree here.
An air-to-water heat pump can generally be used in most houses. These units cover a wide range of capacities, suitable for everything from small to large single-family homes. Some models also feature capacity modulation.
When it comes to actual savings, it is generally true that investing in an efficient heating system pays off more the worse a building is insulated (as you basically mentioned). However, I think location is even more important—at colder locations, gas is usually more economical, while in warmer areas a heat pump definitely makes more sense.
I also believe that a good air-to-water heat pump is more expensive than a gas condensing boiler, but there are no connection costs for gas or similar expenses, so the overall cost for an air-to-water heat pump is not significantly higher! Additionally, with gas, you might also need solar thermal systems (for hot water), just to meet (at least theoretically) appropriate primary energy values. In that case, the gas condensing boiler becomes less cost-effective compared to the air-to-water heat pump.
Maintenance for heat pumps, other than that, is very low. How often do you service your refrigerator? Also, with a gas condensing boiler, after 10 years you might need more than just routine maintenance, to take your example. I think there is little bias in this comparison.
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