Allegro-Haus GmbH experiences

  • Erstellt am 2012-05-03 11:14:21

Shism

2012-06-22 12:53:17
  • #1


Whether solar-supported water heating is reasonable is a topic in itself... economically, it is often not sensible... it is often done in combination with gas heating to reduce primary energy demand in order to achieve a certain KfW classification...

When you consider the costs for the solar system + pump + electricity costs + financing costs + service life, etc., it is often more expensive than simply heating the water with gas...



A heat pump does not provide water temperatures high enough to properly operate a "conventional" radiator... therefore, in new buildings, almost always underfloor heating is used nowadays.. this works with significantly lower water temperatures in the range of about 35°C

So if you want to use panel radiators, it might be sensible to use a gas heating system.. but the question is why do you want to use panel radiators???



And exactly that is an important point... if you cannot connect to the city network, you need a tank... that costs money, takes up space, must be refilled regularly, etc... furthermore, gas heating systems with liquid gas do not seem to be as efficient as with natural gas from the supply network... at least that is what I infer from €uro's explanations...

To be able to make a qualified decision about what is better for you, you need a proper heating load calculation... then you can better foresee which option would be more expensive and which might be more economically reasonable in the long term...
 

Condor

2012-06-22 15:42:20
  • #2
Thank you very much for your cooperation, I still have to think everything over.

Condor
 

Condor

2012-07-11 18:25:51
  • #3
Hello, to all home builders, I have now decided on a ground source heat pump from Viessmann. Does anyone have experience with the Vitocal 333-G model, 7.7 KW combination unit with 170-liter domestic hot water storage tank?
 

BratacDD

2012-07-12 09:47:13
  • #4
Hello Condor,

nice to read that your planning is progressing. Our planning is also moving forward a bit now... Have you already received all the documents (Flurkarte, Teilungsvorschlag, Bauleistungsbeschreibung, Entwurf Kaufvertrag)? Do you know what the max. floor area for your property was?

Best regards

Bratac
 

Condor

2012-07-12 11:27:52
  • #5


Hello Bratac,

We dropped out of Allegro, it was too unreliable for us. We are looking for something new again. But I am already getting informed about this and that in case things get serious again.

Regards, Condor
 

€uro

2012-07-12 11:28:43
  • #6
What is the actual demand (power, energy) for heating and DHW? Unfortunately, full modulation is not available with these devices.

Best regards
 

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