Installation of a gas heating system in new construction 2023/2024

  • Erstellt am 2023-04-11 14:47:10

andimann

2023-04-26 17:00:43
  • #1
Hello again,



Like so many things you write, this is once again wrong....

This explicitly does not apply to low-temperature and condensing systems. That was already standard in the 90s. If you still find a constant temperature heater in the basement, it is probably much older than 30 years. Replacing it would probably really be a good idea....

Andreas
 

xMisterDx

2023-04-26 17:31:52
  • #2


Oh storytime, I’m grabbing cookies.
I have had 4 rental apartments so far, and in none of them would I have made it through even a mild winter with 40 °C flow temperature...

Even heat pumps for new buildings these days are usually designed for 38°C, if the person here doesn’t check the forum and let Flo put 25°C flow, not a degree more, into their head... why then lay ProHaus 2.5 km of heating pipe in the screed...

You think 37-40°C is enough for normal wall radiators? Quickly patent that; we’ve discovered new physics!
 

xMisterDx

2023-04-26 17:41:26
  • #3
By the way, the CO2 price in 2027 is not a done deal yet. There is still a lot of water to flow down the Rhine. We are currently in a war and in Europe also in a slowly taking shape, massive economic crisis. I can no longer even count the steps back that have already been taken in politics on major decisions. Intel, which actually wanted to invest several billion in Magdeburg, has already said, "More money from you and guaranteed electricity prices below 8 cents or we'd rather build in the 'land of the brave.' Uncle Biden is happy to give us the money." By the way, I don't want to heat with fossil gas at all. Green methane would be preferable to me. Because this idea of first converting electricity into hydrogen, then storing it, then converting it back into electricity in winter, sending it over power lines that we don’t even have enough of to operate heat pumps... That is absurd. There is a dense natural gas network under Germany. Convert the hydrogen directly into methane and burn it in heating systems. Efficiency 110%. Besides, what are all those gas power plants doing in summer? Standing around and costing money?
 

xMisterDx

2023-04-26 18:07:51
  • #4
This rotor engine is certainly Habeck's advisor. Do you know each other from writing children's books or from studying philology? Well, there is no physics, that’s true. And what the farmer doesn't understand... he laughs about it. Right? ;)
 

RotorMotor

2023-04-26 18:22:11
  • #5
Oh, oh, so you don't write all that nonsense as satire at all?
 

andimann

2023-04-26 18:49:33
  • #6


Unfortunately not, since it's nothing new. Of course that's enough, you can easily calculate that yourself. Grab a good book on thermodynamics and get started.
The circulation pump must of course be set so that heat still reaches the last radiator.
The heating then ran continuously, almost 24/7 in winter, and not this nonsense with the heating almost off during the day etc. The amount of heating energy a house needs remains (largely) the same, whether you heat continuously at a low level 24/7 or think you only need to run the heating for 2 hours in the morning and 2 hours in the evening. In the latter case, you naturally need a bit more pressure on the line, meaning higher flow temperatures.

The 38 °C flow temperature as the standard design, even for heat pumps, comes from the savings potential for heating professionals and from completely outdated calculation methods that assume temperatures of -30°C for weeks in winter. And unfortunately probably also from insufficient knowledge in thermodynamics among heating technicians. And nobody should later complain that the bathroom doesn't reach 25°C, etc.
Technically, what is being done there is really complete rubbish. Whether 25 °C flow temperature really has to be must be debated. For a modern house, a good 30-33 °C should really be enough.

Best regards,

Andreas
 

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