Hello
I am currently facing a problem. Starting from July 1, 2022, the new Climate Protection Act comes into effect in Schleswig-Holstein. My house was built at the end of the 1960s and so far has only been insulated on the roof. At the moment, I have an oil heating system that is about 20 years old and could probably still run for another 5 to 10 years. After that, I planned to switch to gas. But this new law changes everything, as after July 1, I will not easily get approval for a gas heating system. It is also difficult to find information or options. The law states that 15% of the thermal energy must come from renewable sources. None of the options seem to work with my situation. Here is a list of the possibilities and the problems I see with each.
Gas heating with a supplier contract that includes a biomethane share / not possible because my domestic hot water supply is provided by an instantaneous water heater. In this case, the hot water supply must also come 15% from renewables.
Solar thermal / My roof is already fully covered with a photovoltaic system.
Heat pump / my insulation is too poor for this (although I do have an air conditioner in the bedroom that can also provide heating).
Additional pellet stove / I have a large pellet stove in the living room, but it must heat at least 30% of the total living area. This would mean I would have to remove doors between the living room and bedroom.
The domestic hot water supply with the instantaneous water heater is already the most sensible solution for me since I live alone and am often away for work. Therefore, the hot water consumption is very low and is also generated by the photovoltaic system.
Does anyone know another solution to meet the 15% requirement?
I would prefer not to have my heating system replaced in a rush. Also, I don’t even know how quickly the gas connection can be installed.
I appreciate any advice.
Regards
Sebastian
I am currently facing a problem. Starting from July 1, 2022, the new Climate Protection Act comes into effect in Schleswig-Holstein. My house was built at the end of the 1960s and so far has only been insulated on the roof. At the moment, I have an oil heating system that is about 20 years old and could probably still run for another 5 to 10 years. After that, I planned to switch to gas. But this new law changes everything, as after July 1, I will not easily get approval for a gas heating system. It is also difficult to find information or options. The law states that 15% of the thermal energy must come from renewable sources. None of the options seem to work with my situation. Here is a list of the possibilities and the problems I see with each.
Gas heating with a supplier contract that includes a biomethane share / not possible because my domestic hot water supply is provided by an instantaneous water heater. In this case, the hot water supply must also come 15% from renewables.
Solar thermal / My roof is already fully covered with a photovoltaic system.
Heat pump / my insulation is too poor for this (although I do have an air conditioner in the bedroom that can also provide heating).
Additional pellet stove / I have a large pellet stove in the living room, but it must heat at least 30% of the total living area. This would mean I would have to remove doors between the living room and bedroom.
The domestic hot water supply with the instantaneous water heater is already the most sensible solution for me since I live alone and am often away for work. Therefore, the hot water consumption is very low and is also generated by the photovoltaic system.
Does anyone know another solution to meet the 15% requirement?
I would prefer not to have my heating system replaced in a rush. Also, I don’t even know how quickly the gas connection can be installed.
I appreciate any advice.
Regards
Sebastian
B
Benutzer20013 Feb 2022 15:46sebikiel schrieb:
Is a pellet heating system for 25,000€ compared to a gas heating system for 6,000€ already disproportionate, or is it still reasonable for climate protection? sebikiel schrieb:
There is another room between the heating system and the possible storage space. This would require complex conveying technology. That already gives you the answer. It is disproportionate.
sebikiel schrieb:
A hot water heat pump would not be worthwhile because my hot water usage is extremely low. That would also be disproportionate since you would need to install new pipes for it. So far, you only have instantaneous water heaters.
Once again: stay calm.
sebikiel schrieb:
But does the additional heat pump provide enough temperature to operate standard radiators? 60 degrees Celsius (140°F)? Is that sufficient for you?
Otherwise, consider consulting an energy advisor about switching to a heat pump. Perhaps standard heat pump radiators are enough for your house. Then with a heating curve of 40/34 and it could run efficiently.
D
Deliverer14 Feb 2022 10:34sebikiel schrieb:
Basically, I’m already using it in the bedroom with the air conditioner, where I heat a bit during the transitional seasons.For one, air-to-air heat pumps (air conditioners) have been, and possibly still are (I’m not completely up to date), subsidized by the Bafa if they are purchased "mainly for heating." So I would definitely check that option again. On the other hand, these units aren't so expensive that it wouldn’t make sense to install them without subsidies in some older buildings and use them for heating—at least until it gets colder than around -5°C (23°F). There are also models that operate down to -20°C (-4°F), but at some point, gas heating will probably become more economical.
sebikiel schrieb:
But does the additional heat pump deliver enough temperature to operate standard radiators?Yes. In many cases, a complete switch is even possible. If the heat output isn’t sufficient, you can replace individual radiators. It’s important to ensure good flow through the radiators and keep them fully open at all times. No nighttime setback or similar measures. This allows the supply temperature to be kept consistently low.
I recently read a study that found significant efficiency losses only above 55°C (131°F) supply temperature (for natural refrigerants). A supply temperature of 55°C (131°F) requires only 13% more electricity than 35°C (95°F), so there’s no need to make yourself anxious about it.
Modern heat pumps can also reach up to 70°C (158°F) if they use propane as a refrigerant. These models are therefore particularly suitable for older buildings and are not pushed to their limit if you occasionally need 50°C (122°F).
I wouldn’t pursue pellets further either—climate-wise, it doesn’t matter much whether the CO2 comes from gas or wood. It still ends up in the atmosphere.
Otherwise, I would also agree with @Benutzer200 and recommend staying calm for now. Don’t rush anything, plan carefully—there are good options available.
D
Deliverer14 Feb 2022 10:49Deliverer schrieb:
55°C (131°F) requires only 13% more electricity than 35°C (95°F) supply temperature.Of course, it should have said "13% more electricity."Thank you for your replies. That puts me a bit at ease, and I won’t worry unnecessarily.
However, today I already submitted an application for a gas connection. Hopefully, there will be a company that can deliver and install a gas heating system in time. Lately, I’ve had several issues with the shortage of skilled workers.
However, today I already submitted an application for a gas connection. Hopefully, there will be a company that can deliver and install a gas heating system in time. Lately, I’ve had several issues with the shortage of skilled workers.
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