ᐅ House construction, KfW 70 standard, approximately 150 m² – which heating system? Gas boiler or air-to-water heat pump?
Created on: 14 Apr 2015 12:58
L
LittleWulf
Hello, we plan to start building our own home this year. For various reasons, we want to work with a provider that offers a complete service package. Currently, we are deciding between Fischer Bau and Helma.
About our house:
We are about 95% sure that it will be the house shown in the attachment (attachment: image from the provider Fischer Bau).
We aim to achieve KFW70 standard. No basement, underfloor heating throughout the house, blinds all around, additional towel radiator in the bathroom, brick facade, and a hip roof with a dormer.
The plot is located in a village; the roof area (with dormer) probably faces south-southeast.
I have been researching and reading about all aspects of building a house for some time now. So far, I have been quite interested in the air-to-water heat pump. It seems to be a good and reliable heating system that is somewhat future-proof. However, the more I have looked into air-to-water heat pumps, the more negatives I have found.
Both providers initially proposed a gas heating system with solar panels in their basic offers. However, upon my inquiries, both also offered an air-to-water heat pump with ventilation and exhaust air heat recovery as an alternative.
At the moment, I am quite unsure what the best heating system for our house is. Many statements about air-to-water heat pumps, such as them being very noisy and inefficient, come from the years 2010–2012. I am not sure if that is still accurate. Gas is basically not bad either, a solid heating medium with mature technology.
I hope to receive some comments and suggestions here on how best to approach this. I think ventilation and exhaust ventilation are important today since houses are very airtight, and one cannot or does not ventilate as often as needed.
But gas? Solar? Air-to-water heat pump?
I am somewhat overwhelmed by the information, and I really can’t find any independent or unbiased advice.
---------------------------------
Hello,
I have edited your post regarding the link; please observe the forum rules. Thank you!
Best regards, Bauexperte
Bauexperte
About our house:
We are about 95% sure that it will be the house shown in the attachment (attachment: image from the provider Fischer Bau).
We aim to achieve KFW70 standard. No basement, underfloor heating throughout the house, blinds all around, additional towel radiator in the bathroom, brick facade, and a hip roof with a dormer.
The plot is located in a village; the roof area (with dormer) probably faces south-southeast.
I have been researching and reading about all aspects of building a house for some time now. So far, I have been quite interested in the air-to-water heat pump. It seems to be a good and reliable heating system that is somewhat future-proof. However, the more I have looked into air-to-water heat pumps, the more negatives I have found.
Both providers initially proposed a gas heating system with solar panels in their basic offers. However, upon my inquiries, both also offered an air-to-water heat pump with ventilation and exhaust air heat recovery as an alternative.
At the moment, I am quite unsure what the best heating system for our house is. Many statements about air-to-water heat pumps, such as them being very noisy and inefficient, come from the years 2010–2012. I am not sure if that is still accurate. Gas is basically not bad either, a solid heating medium with mature technology.
I hope to receive some comments and suggestions here on how best to approach this. I think ventilation and exhaust ventilation are important today since houses are very airtight, and one cannot or does not ventilate as often as needed.
But gas? Solar? Air-to-water heat pump?
I am somewhat overwhelmed by the information, and I really can’t find any independent or unbiased advice.
---------------------------------
Hello,
I have edited your post regarding the link; please observe the forum rules. Thank you!
Best regards, Bauexperte
Bauexperte
Take a look at this thread/post about the ventilation system:
https://www.hausbau-forum.de/threads/kontrollierte-be-und-Entlüftung-hygienische-Probleme-nach-5-6-Jahren.10867/page-8#post-80826
There has already been a lot of discussion on this topic... It really comes down to personal beliefs.
I know your heating dilemma; we had the exact same situation. Also the issue with the ventilation system. We were limited because we didn’t have access to gas and would have needed a tank. At first, geothermal energy (with a collector) was our favorite option, but due to cost reasons, we ended up going with an air-source heat pump.
If you have a gas supply line in your neighborhood, I would recommend gas. It has the lowest initial costs and clean combustion. The expenses for other heating systems don’t pay off for a long time…
https://www.hausbau-forum.de/threads/kontrollierte-be-und-Entlüftung-hygienische-Probleme-nach-5-6-Jahren.10867/page-8#post-80826
There has already been a lot of discussion on this topic... It really comes down to personal beliefs.
I know your heating dilemma; we had the exact same situation. Also the issue with the ventilation system. We were limited because we didn’t have access to gas and would have needed a tank. At first, geothermal energy (with a collector) was our favorite option, but due to cost reasons, we ended up going with an air-source heat pump.
If you have a gas supply line in your neighborhood, I would recommend gas. It has the lowest initial costs and clean combustion. The expenses for other heating systems don’t pay off for a long time…
L
LittleWulf15 Apr 2015 12:51Thanks, I will take a look at the thread.
B
Bauexperte15 Apr 2015 13:42WildThing schrieb:
If you have a gas line in the neighborhood, I would recommend gas. Lowest initial costs and clean combustion. Clean ... but what about the extraction of the gas?
WildThing schrieb:
The costs of other heating systems do not pay off for a long time... This statement is not generally true, as it always depends on the specific builder and their calculations. There are providers where a gas condensing boiler with heat recovery is cost-neutral compared to an air-to-water heat pump. However, regarding the other renewable energy options, I agree with you.
Regards, Bauexperte
L
LittleWulf15 Apr 2015 17:21Hmm, okay.
I have now read through the 12 pages about ventilation.
But I couldn’t really take away much valuable information. What I do like is that it clearly explained the difference between centralized and decentralized systems, but unfortunately, that was about the only useful information for me.
I still don’t know whether I’m better off with a centralized or a decentralized system.
I do know that what someone offered me corresponds to a "simple exhaust ventilation system" with heat recovery.
I have now read through the 12 pages about ventilation.
But I couldn’t really take away much valuable information. What I do like is that it clearly explained the difference between centralized and decentralized systems, but unfortunately, that was about the only useful information for me.
I still don’t know whether I’m better off with a centralized or a decentralized system.
I do know that what someone offered me corresponds to a "simple exhaust ventilation system" with heat recovery.
a) Do you live loudly or quietly? -> Loud: centralized, quiet: centralized/decentralized
b) Is money very tight? -> No: centralized, yes: decentralized (generally somewhat cheaper)
c) Are you afraid of the bad pipe? -> No: centralized/decentralized, yes: decentralized
d) Would you possibly like to rent out a floor? -> No: centralized/decentralized, yes: rather decentralized (otherwise there might be disputes about drafts – although you might also reduce outlets?!)
e) Do you care about the appearance? -> Yes: centralized, no: centralized/decentralized
f) Are you very sensitive to noise? -> Yes: centralized, no: decentralized/centralized
g) Does your building supervisor/site manager pressure you toward a certain solution? -> Take the one they want; they can’t or won’t accept the other option
b) Is money very tight? -> No: centralized, yes: decentralized (generally somewhat cheaper)
c) Are you afraid of the bad pipe? -> No: centralized/decentralized, yes: decentralized
d) Would you possibly like to rent out a floor? -> No: centralized/decentralized, yes: rather decentralized (otherwise there might be disputes about drafts – although you might also reduce outlets?!)
e) Do you care about the appearance? -> Yes: centralized, no: centralized/decentralized
f) Are you very sensitive to noise? -> Yes: centralized, no: decentralized/centralized
g) Does your building supervisor/site manager pressure you toward a certain solution? -> Take the one they want; they can’t or won’t accept the other option
BeHaElJa schrieb:
a) Are you afraid of the nasty pipe? Hahaha
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