Does it make sense to install a heat pump in a newly built single-family house without a photovoltaic system, or would the electricity consumption be too high? We were considering an air-to-water or water-to-water heat pump.
I need to clarify a few points.
1) I like the comparison with refrigerators. Those things also tend to break down easily and can be noisy. Besides, they consume a significant amount of electricity.
2) With gas heating, I don’t need a wood stove. This also has nothing to do with underfloor heating. I can certainly operate that at higher supply temperatures. It makes a huge difference whether it’s 26°C (79°F) or 31°C (88°F).
3) Heat pumps also require annual maintenance, which can easily cost around 250 euros. Whether you do it yourself is another matter, but this is the manufacturer’s recommendation and sometimes required to maintain the warranty (depending on the manufacturer).
4) The investment for a heat pump is higher than for a gas heating system, even with mandatory solar thermal collectors. Unless you install a geothermal heat pump yourself, but very few homeowners manage to do that.
I have to strongly disagree with the last paragraph. Forums are full of cases like this. Heating technicians switch the system on and that’s it. Adjustments to the heating curve, etc., are usually not done. Hydraulic balancing is often performed but on its own, it has little effect.
The result is electricity consumption figures like those you find all over the internet. I adjusted my own heat pump settings and cut electricity use by 50%. But not everyone can or wants to do this. With gas heating, this is not necessary.
Our air-to-water heat pump runs very well now, I can’t complain. It’s relatively quiet, reasonably efficient, and mostly trouble-free. Still, gas would have saved me a lot of hassle and money. Unfortunately, there is no gas connection here, and LPG was never an option due to the tank.
Heat pumps were popular in the 1980s, then faded away, and now they are back. I am firmly convinced they will soon disappear from the market again because they are neither ecologically nor economically sustainable.
1) I like the comparison with refrigerators. Those things also tend to break down easily and can be noisy. Besides, they consume a significant amount of electricity.
2) With gas heating, I don’t need a wood stove. This also has nothing to do with underfloor heating. I can certainly operate that at higher supply temperatures. It makes a huge difference whether it’s 26°C (79°F) or 31°C (88°F).
3) Heat pumps also require annual maintenance, which can easily cost around 250 euros. Whether you do it yourself is another matter, but this is the manufacturer’s recommendation and sometimes required to maintain the warranty (depending on the manufacturer).
4) The investment for a heat pump is higher than for a gas heating system, even with mandatory solar thermal collectors. Unless you install a geothermal heat pump yourself, but very few homeowners manage to do that.
I have to strongly disagree with the last paragraph. Forums are full of cases like this. Heating technicians switch the system on and that’s it. Adjustments to the heating curve, etc., are usually not done. Hydraulic balancing is often performed but on its own, it has little effect.
The result is electricity consumption figures like those you find all over the internet. I adjusted my own heat pump settings and cut electricity use by 50%. But not everyone can or wants to do this. With gas heating, this is not necessary.
Our air-to-water heat pump runs very well now, I can’t complain. It’s relatively quiet, reasonably efficient, and mostly trouble-free. Still, gas would have saved me a lot of hassle and money. Unfortunately, there is no gas connection here, and LPG was never an option due to the tank.
Heat pumps were popular in the 1980s, then faded away, and now they are back. I am firmly convinced they will soon disappear from the market again because they are neither ecologically nor economically sustainable.
hausnrplus253 May 2020 21:47Um, well, the discussion is quite amusing and maybe helpful in some aspects, but overall it has already been discussed multiple times in the forum (with the same outcome as here) and unfortunately completely misses the original poster’s question.
He doesn’t want a gas heating system; he is asking about the advantages and disadvantages of a photovoltaic system with a heat pump.
?!
He doesn’t want a gas heating system; he is asking about the advantages and disadvantages of a photovoltaic system with a heat pump.
?!
D
Denk_Mal194 May 2020 14:34Heat pumps are now technically mature and operate reliably – high electricity consumption is often caused by faulty system design and installation. Heat pumps also have another advantage: in summer, they can actively or passively cool the house and keep temperatures comfortable even during extended heatwaves.
By the way, the benefits of low gas prices will no longer apply in a few years. Then, saving money with a gas boiler will be over. From 2021 onwards, CO2 pricing will increase stepwise, and if Germany adopts the pricing levels of other countries/pioneers (120.00 € per ton), gas prices will be 80% higher by 2035 compared to today’s levels! Where is the savings effect then?
So my tip and experience: heat pump plus photovoltaic system is the optimal solution. Don’t cut costs in the wrong place here!
By the way, the benefits of low gas prices will no longer apply in a few years. Then, saving money with a gas boiler will be over. From 2021 onwards, CO2 pricing will increase stepwise, and if Germany adopts the pricing levels of other countries/pioneers (120.00 € per ton), gas prices will be 80% higher by 2035 compared to today’s levels! Where is the savings effect then?
So my tip and experience: heat pump plus photovoltaic system is the optimal solution. Don’t cut costs in the wrong place here!
T
T_im_Norden4 May 2020 15:24Can you quickly lend me your crystal ball?
Back when night storage heaters were promoted and subsidized with special tariffs, it was also said that this would be the optimal solution.
Whether it is the optimal solution has to be calculated individually and also depends on assumptions about the future price development of gas and electricity, whether the 52 GW cap is lifted, and whether expensive smart meters become mandatory.
Back when night storage heaters were promoted and subsidized with special tariffs, it was also said that this would be the optimal solution.
Whether it is the optimal solution has to be calculated individually and also depends on assumptions about the future price development of gas and electricity, whether the 52 GW cap is lifted, and whether expensive smart meters become mandatory.
N
nordanney4 May 2020 16:05Bookstar schrieb:
2) With gas, I don’t need a wood stove. It also has nothing to do with underfloor heating. I can certainly run it with higher supply temperatures. There is a huge difference between 26 degrees and 31 degrees.Let’s set the other points aside for now. How do you quickly raise your place from 20 to 24 degrees with a gas heating system (with underfloor heating)? To do that, you need to heat the entire screed in the living area to 24 degrees. And then quickly down to 20 degrees again (sure, with windows open permanently this works well and economically in winter)?Similar topics