Computational Consideration of Various Energy Concepts

  • Erstellt am 2014-01-26 16:29:59

K.Brodbeck

2014-01-28 11:44:36
  • #1


With such 'combination stones', I think caution is warranted!

Poroton is available with perlite (good) and with mineral wool (MW, I would stay away from that). Twinstone is an aerated concrete block (if I have seen that correctly), similar to the Yong system. From an ecological and building biology perspective, aerated concrete blocks and Poroton with perlite can certainly be rated as good. Gisoton, on the other hand, has a foam filling, which I would avoid.

Besides the price, there are other decision criteria that can be considered.

A filling made of mineral wool or foam certainly restricts vapor diffusion through the masonry (although if the inside of the house is painted with dispersion paint, it all doesn't matter anyway).

Regarding aerated concrete, I have heard disadvantages concerning sound insulation (you hear a lot from the street, or vice versa) and mechanical fastening of objects to the wall (screwing), but I have no practical experience with it!

Best regards

K. Brodbeck
 

Mycraft

2014-01-28 11:58:52
  • #2
There are plenty of comparisons... just search for them, e.g. type in "Gas Wärmepumpe Kostenvergleich" and you will get various forecasts...

Due to the high initial costs, heat pumps are usually ranked towards the back...
 

klblb

2014-01-28 11:58:55
  • #3
@K.Brodbeck

Sure, price isn't everything! Absolutely right!
I share your ecological, building physics, and building biology assessment of the 3 stones (Poroton, Twinstone, Gisoton).
Sound insulation must of course be assessed individually. Regarding screwing objects onto the wall, I have not heard of any restrictions with aerated concrete so far.
 

Bauexperte

2014-01-28 12:29:13
  • #4
Hello,



I'll start from the end ...

It is incomprehensible to me that builders like you are willing to invest a lot of money to realize their dream home. But at a significant point, the vast majority of home builders have in common that they want to "save," preferring to save their money for extras in the equipment. A good energy consultant (provided this service is not covered by the favored, reputable provider) – characterized by appropriate training and not by the IHK stamp proving he attended a 3-hour seminar – costs between EUR 1,000 and 3,000 depending on the scope of the assignment and the size of the construction project. This is very well-invested money if it leads to an economically sensible decision at the end of the day. Also regarding energy consulting, there is no one-size-fits-all solution for all construction projects; meaning, each project must be considered individually.

I also observe this tendency myself as a mod here on the HBF. Depending on the time limit, I try to answer the questions in my field of expertise as well as possible. And yet there are almost weekly jokers who think I would evaluate their entire construction documents for free just because I conveniently provide information for everyone here on the HBF. With an investment mostly over EUR 300,000 per project, I can only shake my head that a few hundred euros are supposed to be “saved” this way at my expense so that there are reserves for a more valuable washbasin or whatever for mom...

For you, this means – regardless of the fact that this topic has already been discussed x times here on the HBF and thus reading educates – that you should put yourself in the hands of a reputable sales consultant you trust, arrange a meeting at the Energy Agency NRW, or consult a trained energy consultant. In my opinion, you do not possess the required knowledge to make this decision alone and without accompanying expertise. And if it costs you money, that is only fair – every service must be paid for. The primary thing is that it leads you to your goal. One or the other extra in equipment can also be purchased over the years.


Why do you prefer to install a geothermal heat pump? Maybe it is not economically reasonable for your project because the ground conditions do not allow it at all?

Why do you calculate with 30 years? A current gas condensing boiler already reaches the end of its life after about 15 years +/- because its technology produces condensate.

Maybe a air-to-water heat pump would be exactly the right decision for your construction project – or do you believe the statements of laypeople saying your electricity meter will explode?

There are many roads to Rome. Which technology ultimately is the most economically sensible decision for your project cannot be limited solely to the question of amortization. As I have written multiple times, no construction project is comparable to another.

Rhenish greetings
 

Bauexperte

2014-01-28 12:34:25
  • #5
Hello,


With 36.5 cm walls and thicker, sound insulation no longer plays a role; special anchors are needed for almost every type of masonry. A running gag among seller colleagues is, for example, the advice to have quick-setting cement on hand for masonry made of high perforated bricks.

As good as it gets - everything has advantages and disadvantages.

Rhenish greetings
 

€uro

2014-01-28 14:09:48
  • #6
Hello,
Correct. However, there is never amortization for heating systems, as they always generate losses, never profits! Maybe one should say goodbye to this terminology in this area!

Best regards
 

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